Powered by Deep Web Technologies
Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Radiation Exposure Monitoring Systems (REMS)  

NLE Websites -- All DOE Office Websites (Extended Search)

format. HEADLINES... 2012 Annual Report 2012 draft data available through the REMS query tool 2012 Submittal Notification REMS Reporting Guide, containing the required format...

2

ORISE: DOE's Radiation Exposure Monitoring System (REMS)  

NLE Websites -- All DOE Office Websites (Extended Search)

Monitoring System (REMS) Monitoring System (REMS) ORISE maintains large database of radition exposure records for the U.S. Department of Energy ORISE staff monitoring radiation data for DOE Rule 10 CFR 835 establishes the U.S. Department of Energy's (DOE) occupational protection rule and requires assessment and recording of radiation doses to individuals who are exposed to sources of radiation or contamination. The Radiation Exposure Monitoring System (REMS) database is the radiation exposure data repository for all monitored DOE employees, contractors, subcontractors and members of the public. REMS maintains dose records for all monitored individuals dating back to 1969. Aggregated, site-specific data are available on the Radiation Exposure Monitoring System website for all years since 1986. Currently,

3

Rem&al Action Performed  

Office of Legacy Management (LM)

Rem&al Action Performed Rem&al Action Performed at the B&T Metals Site in * Columbus, Ohio Department of Energy Office of Assistant Manager for Environmenta/ Management Oak Ridge Operations June 2007 Printed on recycled/recyclable paper. 1.41 2503.2 CERTIFICATION DOCKET FOR THE REMEDIAL ACTION PER-FORMED AT THE B&T METALS SITE IN COLUMBUS, OHIO JUNE 200 1 Prepared for United States Department of Energy Under Contract No. DACW45-98-D-0028 BY Bechtel National, Inc. Oak Ridge, Tennessee Bechtel Job No. 14501 B&TFinal 6/2001 CONTENTS FIGURES ..................................................................................................................................................... iv ACRON-YhiS ...............................................................................................................................................

4

Building Energy Software Tools Directory: REM/Rate  

NLE Websites -- All DOE Office Websites (Extended Search)

REM/Rate REM/Rate REM/Rate logo. User-friendly, yet highly sophisticated, residential energy analysis, code compliance and rating software developed specifically for the needs of HERS providers. REM/Rate calculates heating, cooling, hot water, lighting, and appliance energy loads, consumption and costs for new and existing single and multi-family homes. Climate data is available for cities and towns throughout North America. A home energy rating is calculated based on the proposed DOE HERS guidelines (10 CFR 437) as modified by the RESNET/NASEO HERS Technical Committee. In addition to an energy rating, REM/Rate creates value added information including energy efficiency mortgage report, energy appraisal addendum, energy code compliance (MEC, IECC, and ASHRAE), improvement analysis (existing homes), design optimization (new homes),

5

Building Energy Software Tools Directory: REM/Design  

NLE Websites -- All DOE Office Websites (Extended Search)

REM/Design REM/Design REM/Design logo. User-friendly, yet highly sophisticated, residential energy analysis and code compliance software which eliminates the uncertainty and guesswork from energy design and code compliance decisions. Developed specifically with the needs of homebuilders, remodelers, energy consultants and designers in mind, REM/Design calculates heating, cooling, hot water, lights and appliance loads, consumption and costs for single and multi-family designs in over 250 North American cities. This Windows-based software automatically analyzes the energy and economic performance of numerous energy design features including envelope insulation, air leakage control, duct leakage control, active and passive solar systems, heating and cooling equipment, mechanical ventilation and more. In addition to

6

Aging gauge  

DOE Patents (OSTI)

An aging gauge comprising a container having a fixed or a variable sized t opening with a cap which can be opened to control the sublimation rate of a thermally sublimational material contained within the container. In use, the aging gauge is stored with an item to determine total heat the item is subjected to and also the maximum temperature to which the item has been exposed. The aging gauge container contains a thermally sublimational material such as naphthalene or similar material which has a low sublimation rate over the temperature range from about 70.degree. F. to about 160.degree. F. The aging products determined by analyses of a like item aged along with the aging gauge for which the sublimation amount is determined is employed to establish a calibration curve for future aging evaluation. The aging gauge is provided with a means for determining the maximum temperature exposure (i.e., a thermally indicating material which gives an irreversible color change, Thermocolor pigment). Because of the relationship of doubling reaction rates for increases of 10.degree. C., equivalency of item used in accelerated aging evaluation can be obtained by referring to a calibration curve depicting storage temperature on the abscissa scale and multiplier on the ordinate scale.

Betts, Robert E. (Huntsville, AL); Crawford, John F. (Huntsville, AL)

1989-01-01T23:59:59.000Z

7

Strain gauge installation tool  

SciTech Connect

A tool and a method for attaching a strain gauge to a test specimen by maaining alignment of, and applying pressure to, the strain gauge during the bonding of the gauge to the specimen. The tool comprises rigid and compliant pads attached to a spring-loaded clamp. The pads are shaped to conform to the specimen surface to which the gauge is to be bonded. The shape of the pads permits the tool to align itself to the specimen and to maintain alignment of the gauge to the specimen during the bond curing process. A simplified method of attaching a strain gauge is provided by use of the tool.

Conard, Lisa Marie (Swissvale, PA)

1998-01-01T23:59:59.000Z

8

Strain gauge installation tool  

DOE Patents (OSTI)

A tool and a method for attaching a strain gauge to a test specimen by maintaining alignment of, and applying pressure to, the strain gauge during the bonding of the gauge to the specimen. The tool comprises rigid and compliant pads attached to a spring-loaded clamp. The pads are shaped to conform to the specimen surface to which the gauge is to be bonded. The shape of the pads permits the tool to align itself to the specimen and to maintain alignment of the gauge to the specimen during the bond curing process. A simplified method of attaching a strain gauge is provided by use of the tool.

Conard, Lisa Marie

1997-12-01T23:59:59.000Z

9

Evaluation of 2 Rem per Year Occupational Dose Limit: Potential Effects on U.S. Nuclear Utilities  

Science Conference Proceedings (OSTI)

This interim report provides an evaluation of potential impacts on the U.S. nuclear power industry of a reduction in the occupational radiation dose limit from 5 rem per year to 2 rem per year.

2006-12-22T23:59:59.000Z

10

Manifestly Gauge Invariant QCD  

E-Print Network (OSTI)

Building on recent work in SU(N) Yang-Mills theory, we construct a manifestly gauge invariant exact renormalization group for QCD. A gauge invariant cutoff is constructed by embedding the physical gauge theory in a spontaneously broken SU(N|N) gauge theory, regularized by covariant higher derivatives. Intriguingly, the construction is most efficient if the number of flavours is a multiple of the number of colours. The formalism is illustrated with a very compact calculation of the one-loop beta function, achieving a manifestly universal result and without fixing the gauge.

Tim R. Morris; Oliver J. Rosten

2006-06-20T23:59:59.000Z

11

Strain gauge installation tool  

DOE Patents (OSTI)

A tool and a method are disclosed for attaching a strain gauge to a test specimen by maintaining alignment of, and applying pressure to, the strain gauge during the bonding of the gauge to the specimen. The tool comprises rigid and compliant pads attached to a spring-loaded clamp. The pads are shaped to conform to the specimen surface to which the gauge is to be bonded. The shape of the pads permits the tool to align itself to the specimen and to maintain alignment of the gauge to the specimen during the bond curing process. A simplified method of attaching a strain gauge is provided by use of the tool. 6 figs.

Conard, L.M.

1998-06-16T23:59:59.000Z

12

Optical heat flux gauge  

DOE Patents (OSTI)

A heat flux gauge comprising first and second thermographic phosphor layers separated by a layer of a thermal insulator. The gauge may be mounted on a surface with the first thermographic phosphor in contact with the surface. A light source is directed at the gauge, causing the phosphors to luminesce. The luminescence produced by the phosphors is collected and its spectra analyzed in order to determine the heat flux on the surface. First and second phosphor layers must be different materials to assure that the spectral lines collected will be distinguishable. 9 figs.

Noel, B.W.; Borella, H.M.; Cates, M.R.; Turley, W.D.; MacArthur, C.D.; Cala, G.C.

1989-06-07T23:59:59.000Z

13

Rod examination gauge  

DOE Patents (OSTI)

The present invention is directed to a semi-automatic rod examination gauge for performing a large number of exacting measurements on radioactive fuel rods. The rod examination gauge performs various measurements underwater with remote controlled machinery of high reliability. The rod examination gauge includes instruments and a closed circuit television camera for measuring fuel rod length, free hanging bow measurement, diameter measurement, oxide thickness measurement, cladding defect examination, rod ovality measurement, wear mark depth and volume measurement, as well as visual examination. A control system is provided including a programmable logic controller and a computer for providing a programmed sequence of operations for the rod examination and collection of data.

Bacvinskas, W.S.; Bayer, J.E.; Davis, W.W.; Fodor, G.; Kikta, T.J.; Matchett, R.L.; Nilsen, R.J.; Wilczynski, R.

1991-12-31T23:59:59.000Z

14

The Hotplate Precipitation Gauge  

Science Conference Proceedings (OSTI)

A new instrument designed to measure precipitation, the “hotplate precipitation gauge,” is described. The instrument consists of a heated thin disk that provides a reliable, low-maintenance method to measure precipitation rate every minute ...

Roy M. Rasmussen; John Hallett; Rick Purcell; Scott D. Landolt; Jeff Cole

2011-02-01T23:59:59.000Z

15

Gauge/Gravity Duality (Gauge Gravity Duality)  

SciTech Connect

Gauge theories, which describe the particle interactions, are well understood, while quantum gravity leads to many puzzles. Remarkably, in recent years we have learned that these are actually dual, the same system written in different variables. On the one hand, this provides our most precise description of quantum gravity, resolves some long-standing paradoxes, and points to new principles. On the other, it gives a new perspective on strong interactions, with surprising connections to other areas of physics. I describe these ideas, and discuss current and future directions.

Polchinski, Joseph (Kavli Institute for Theoretical Physics)

2010-02-24T23:59:59.000Z

16

Data processing unit and power system for the LANL REM instrument package. Final report  

SciTech Connect

The NEPSTP spacecraft needs highly reliable instrumentation to measure the nuclear reactor health and performance. These reactor measurements are essential for initial on-orbit phase operations and documentation of performance over time. Los Alamos National Laboratory (LANL), under the guidance of W. C. Feldman, principal investigator, has designed the Radiation Environment Monitoring (REM) package to meet these needs. The instrumentation package contains two neutron detectors, one gamma-ray detector, a data processing unit, and an instrument power system. The REM package is an integration of quick turn-around, state of the practice technology for detectors, data processors, and power systems. A significant portion of REM consists of subsystems with flight history. Southwest Research Institute (SwRI) has been tasked by LANL to design support electronics, including the Data Processing Unit (DPU) and Power System for REM. The goal for this project is to use technologies from current programs to speed up and simplify the design process. To meet these design goals, the authors use an open architecture VME bus for the DPU and derivatives of CASSINI power supplies for the instrument power system. To simplify integration and test activities, they incorporate a proven software development strategy and tool kits from outside vendors. The objective of this report is to illustrate easily incorporated system level designs for the DPU, power system and ground support electronics (GSE) in support of the important NEPSTP program.

Lockhart, W. [Southwest Research Inst., San Antonio, TX (United States). Instrumentation and Space Research Div.

1994-03-01T23:59:59.000Z

17

Gravity in Gauge Mediation  

E-Print Network (OSTI)

We investigate O'Raifeartaigh-type models for F-term supersymmetry breaking in gauge mediation scenarios in the presence of gravity. It is pointed out that the vacuum structure of those models is such that in metastable vacua gravity mediation contribution to scalar masses is always suppressed to the level below 1 percent, almost sufficient for avoiding FCNC problem. Close to that limit, gravitino mass can be in the range 10-100 GeV, opening several interesting possibilities for gauge mediation models, including Giudice-Masiero mechanism for mu and Bmu generation. Gravity sector can include stabilized moduli.

Zygmunt Lalak; Stefan Pokorski; Krzysztof Turzynski

2008-08-04T23:59:59.000Z

18

Holographic Gauge Mediation  

SciTech Connect

We discuss gravitational backgrounds where supersymmetry is broken at the end of a warped throat, and the SUSY-breaking is transmitted to the Standard Model via gauginos which live in (part of) the bulk of the throat geometry. We find that the leading effect arises from splittings of certain 'messenger mesons,' which are adjoint KK-modes of the D-branes supporting the Standard Model gauge group. This picture is a gravity dual of a strongly coupled field theory where SUSY is broken in a hidden sector and transmitted to the Standard Model via a relative of semi-direct gauge mediation.

Benini, Francesco; /Princeton U.; Dymarsky, Anatoly; /Stanford U., ITP; Franco, Sebastian; /Santa Barbara, KITP; Kachru, Shamit; Simic, Dusan; /Stanford U., ITP /SLAC; Verlinde, Herman; /Princeton, Inst. Advanced Study

2009-06-19T23:59:59.000Z

19

Gauge transformations in non-perturbative chiral gauge theories  

E-Print Network (OSTI)

We reconsider gauge-transformation properties in chiral gauge theories on the lattice observing all pertinent information and show that these properties are actually determined in a general way for any gauge group and for any value of the index. In our investigations we also clarify several related issues.

Werner Kerler

2005-07-20T23:59:59.000Z

20

Chiral Gauge Theory for Graphene  

E-Print Network (OSTI)

We construct a chiral gauge theory to describe fractionalization of fermions in graphene. Thereby we extend a recently proposed model, which relies on vortex formation. Our chiral gauge fields provide dynamics for the vortices and also couple to the fermions.

R. Jackiw; S. -Y. Pi

2007-01-30T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Gauge theory and group representations  

SciTech Connect

The mathematical foundations of gauge theories based on indecomposable representations of space-time symmetry groups are investigated. In particular, twistors and singletons are given a uniform treatment as gauge theories of this type. This is a step toward geometrically unifying all representation based gauge theories. In addition, some implications with respect to the geometric construction of group representations are noted.

Nakashima, M.M.

1988-01-01T23:59:59.000Z

22

Optical Rain Gauge and Tipping Bucket Rain Gauge Comparisons  

NLE Websites -- All DOE Office Websites (Extended Search)

Rain Gauge and Tipping Bucket Rain Gauge Comparisons Rain Gauge and Tipping Bucket Rain Gauge Comparisons at the ARM Climate Research Facility TWP Sites Michael T. Ritsche 1 , Donna J. Holdridge 1 , Amanda Deieso 2 , Amy Kanta 2 , and Jenni Prell 2 1 Environmental Science Division, Argonne National Laboratory, Argonne, IL 2 Department of Geography, Northern Illinois University, DeKalb, IL 1. Introduction Measurement of rainfall and precipitation is a difficult task even in the best of circumstances. Different types of gauges are used depending on the type of precipitation expected (solid or liquid) and the rate at which it falls. The ARM Program uses two types of precipitation sensors in its surface meteorological systems: the optical rain gauge (ORG) and the tipping bucket rain gauge (TBRG). The ORG was originally

23

Fiber optic gap gauge  

DOE Patents (OSTI)

A lightweight, small size, high sensitivity gauge for indirectly measuring displacement or absolute gap width by measuring axial strain in an orthogonal direction to the displacement/gap width. The gap gauge includes a preferably titanium base having a central tension bar with springs connecting opposite ends of the tension bar to a pair of end connector bars, and an elongated bow spring connected to the end connector bars with a middle section bowed away from the base to define a gap. The bow spring is capable of producing an axial strain in the base proportional to a displacement of the middle section in a direction orthogonal to the base. And a strain sensor, such as a Fabry-Perot interferometer strain sensor, is connected to measure the axial strain in the base, so that the displacement of the middle section may be indirectly determined from the measurement of the axial strain in the base.

Wood, Billy E. (Livermore, CA); Groves, Scott E. (Brentwood, CA); Larsen, Greg J. (Brentwood, CA); Sanchez, Roberto J. (Pleasanton, CA)

2006-11-14T23:59:59.000Z

24

Methodology and results of the impacts of modeling electric utilities ; a comparative evaluation of MEMM and REM  

E-Print Network (OSTI)

This study compares two models of the U.S. electric utility industry including the EIA's electric utility submodel in the Midterm Energy Market Model (MEMM), and the Baughman-Joskow Regionalized Electricity Model (REM). ...

Baughman, Martin L.

1981-01-01T23:59:59.000Z

25

Ballistic impulse gauge  

DOE Patents (OSTI)

This invention is comprised of a gauge for detecting the impulse generated in sample materials by X-rays or other impulse producing mechanisms which utilizes a pair of flat annular springs to support a plunger relative to a housing which may itself be supported by a pair of flat annular springs in a second housing. The plunger has a mounting plate mounted on one end and at the other, a position or velocity transducer is mounted. The annular springs consist of an outer ring and an inner ring with at least three arcuate members connecting the outer within the inner ring.

Ault, S.K.

1992-12-31T23:59:59.000Z

26

Cold cathode vacuum gauging system  

DOE Patents (OSTI)

A vacuum gauging system of the cold cathode type is provided for measuring the pressure of a plurality of separate vacuum systems, such as in a gas centrifuge cascade. Each casing is fitted with a gauge tube assembly which communicates with the vacuum system in the centrifuge casing. Each gauge tube contains an anode which may be in the form of a slender rod or wire hoop and a cathode which may be formed by the wall of the gauge tube. The tube is provided with an insulated high voltage connector to the anode which has a terminal for external connection outside the vacuum casing. The tube extends from the casing so that a portable magnet assembly may be inserted about the tube to provide a magnetic field in the area between the anode and cathode necessary for pressure measurements in a cold cathode-type vacuum gauge arrangement. The portable magnetic assembly is provided with a connector which engages the external high voltage terminal for providing power to the anode within in the gauge tube. Measurement is made in the same manner as the prior cold cathode gauges in that the current through the anode to the cathode is measured as an indication of the pressure. By providing the portable magnetic assembly, a considerable savings in cost, installation, and maintenance of vacuum gauges for pressure measurement in a gas centrifuge cascade is realizable.

Denny, Edward C. (Knoxville, TN)

2004-03-09T23:59:59.000Z

27

Warped General Gauge Mediation  

E-Print Network (OSTI)

We develop the formalism of "General gauge mediation" for five dimensional theories in a slice of AdS space. A set of current correlators encodes the effect of a supersymmetry breaking hidden sector localised on the IR brane. These current correlators provide a tree-level gaugino mass and loop-level sfermion masses on the UV brane. We also use this formalism to calculate the Casimir energy and masses for bulk hyperscalars. To illustrate this general construction we consider a perturbative hidden sector of generalised messengers coupled to a spurion. For models with large warping, we find that when the AdS warp factor $k$ is less than the characteristc mass scale $M$ of the hidden sector, the whole Kaluza-Klein tower of vector superfields propagate supersymmetry breaking effects to the UV brane. When $M$ is less than $k$, the zero modes dominate.

Moritz McGarrie; Daniel C. Thompson

2010-09-23T23:59:59.000Z

28

Gauge transformations in lattice chiral theories  

E-Print Network (OSTI)

We show that gauge-transformation properties of correlation functions in chiral gauge theories on the finite lattice are determined in a general way.

Werner Kerler

2004-12-21T23:59:59.000Z

29

2.4. Gauge R & R studies  

Science Conference Proceedings (OSTI)

... 2.4. Gauge R & R studies. ... What are the issues for a gauge R & R study? What are the design considerations for the study? ...

2013-10-30T23:59:59.000Z

30

Microsoft Word - Final Annual TRU Waste Inventory Report-2009...  

Office of Environmental Management (EM)

Conservation and Recovery Act rem Roentgen equivalent man RFETS Rocky Flats Environmental Technology Site RH Remote-handled RN Radionuclide SNL-A Sandia National Laboratories -...

31

Building Gauge Theories: The Natural Way  

E-Print Network (OSTI)

The construction of a gauge field theory for elementary particles usually starts by promoting global invariance of the matter action to a local one, this in turn implying the introduction of gauge fields. We present here a procedure that runs the other way: starting from the action for gauge fields, matter is gauge invariantly coupled on the basis of Lorentz invariance and charge conservation. This natural approach prevents using the concept of particles separated from gauge fields that mediate interactions.

C. A. Garcia Canal; F. A. Schaposnik

2011-10-17T23:59:59.000Z

32

Gauge Interaction as Periodicity Modulation  

E-Print Network (OSTI)

The paper is devoted to a geometrical interpretation of gauge invariance in terms of the formalism of field theory in compact space-time dimensions [arXiv:0903.3680]. In this formalism, the kinematic information of an interacting elementary particle is encoded on the relativistic geometrodynamics of the boundary of the theory through local transformations of the underlying space-time coordinates. Therefore, gauge interaction is described as invariance of the theory under local deformations of the boundary, the resulting local variations of field solution are interpreted as internal transformations, and the internal symmetries of the gauge theory turn out to be related to corresponding local space-time symmetries. In the case of local infinitesimal isometric transformations, Maxwell's kinematics and gauge invariance are inferred directly from the variational principle. Furthermore we explicitly impose periodic conditions at the boundary of the theory as semi-classical quantization condition in order to investigate the quantum behavior of gauge interaction. In the abelian case the result is a remarkable formal correspondence with scalar QED.

Donatello Dolce

2011-10-03T23:59:59.000Z

33

Geometrical Methods in Gauge Theory  

E-Print Network (OSTI)

In this work we explore the geometrical interpretation of gauge theories through the formalism of fiber bundles. Moreover, we conduct an investigation in the topology of fiber bundles, providing a proof of the Classification Theorem. In the last chapter we present some applications, such as electromagnetism and generalized Kaluza-Klein Theory.

Henrique de A. Gomes

2006-10-25T23:59:59.000Z

34

A manifestly gauge invariant exact renormalization group  

E-Print Network (OSTI)

In these lectures we describe the construction of a gauge invariant renormalization group equation for pure non-Abelian gauge theory. In the process, a non-perturbative gauge invariant continuum Wilsonian effective action is precisely defined. The formulation makes sense without gauge fixing and thus manifest gauge invariance may be preserved at all stages. In the large N limit (of SU(N) gauge theory) the effective action simplifies: it may be expressed through a path integral for a single particle whose trajectory describes a Wilson loop. Regularization is achieved with the help of a set of Pauli-Villars fields whose formulation follows naturally in this picture. Finally, we show how the one loop beta function was computed, for the first time without any gauge fixing.

Tim R. Morris

1998-10-14T23:59:59.000Z

35

A gauge invariant exact renormalization group II  

E-Print Network (OSTI)

A manifestly gauge invariant and regularized renormalization group flow equation is constructed for pure SU(N) gauge theory in the large N limit. In this way we make precise and concrete the notion of a non-perturbative gauge invariant continuum Wilsonian effective action. Manifestly gauge invariant calculations may be performed, without gauge fixing, and receive a natural interpretation in terms of fluctuating Wilson loops. Regularization is achieved by covariant higher derivatives and by embedding in a spontaneously broken SU(N|N) supergauge theory; the resulting heavy fermionic vectors are Pauli-Villars fields. We prove the finiteness of this method to one loop and any number of external gauge fields. A duality is uncovered that changes the sign of the squared coupling constant. As a test of the basic formalism we compute the one loop beta function, for the first time without any gauge fixing, and prove its universality with respect to cutoff function.

Tim R. Morris

2000-06-09T23:59:59.000Z

36

Asymptotically Free Gauge Theories. I  

DOE R&D Accomplishments (OSTI)

Asymptotically free gauge theories of the strong interactions are constructed and analyzed. The reasons for doing this are recounted, including a review of renormalization group techniques and their application to scaling phenomena. The renormalization group equations are derived for Yang-Mills theories. The parameters that enter into the equations are calculated to lowest order and it is shown that these theories are asymptotically free. More specifically the effective coupling constant, which determines the ultraviolet behavior of the theory, vanishes for large space-like momenta. Fermions are incorporated and the construction of realistic models is discussed. We propose that the strong interactions be mediated by a "color" gauge group which commutes with SU(3)xSU(3). The problem of symmetry breaking is discussed. It appears likely that this would have a dynamical origin. It is suggested that the gauge symmetry might not be broken, and that the severe infrared singularities prevent the occurrence of non-color singlet physical states. The deep inelastic structure functions, as well as the electron position total annihilation cross section are analyzed. Scaling obtains up to calculable logarithmic corrections, and the naive lightcone or parton model results follow. The problems of incorporating scalar mesons and breaking the symmetry by the Higgs mechanism are explained in detail.

Wilczek, Frank; Gross, David J.

1973-07-00T23:59:59.000Z

37

Quantum Gauged Neural Network: U(1) Gauge Theory  

E-Print Network (OSTI)

A quantum model of neural network is introduced and its phase structure is examined. The model is an extension of the classical Z(2) gauged neural network of learning and recalling to a quantum model by replacing the Z(2) variables, $S_i = \\pm1$ of neurons and $J_{ij} =\\pm1$ of synaptic connections, to the U(1) phase variables, $S_i = \\exp(i\\phi_i)$ and $J_{ij} = \\exp(i\\theta_{ij}) $. These U(1) variables describe the phase parts of the wave functions (local order parameters) of neurons and synaptic connections. The model takes the form similar to the U(1) Higgs lattice gauge theory, the continuum limit of which is the well known Ginzburg-Landau theory of superconductivity. Its current may describe the flow of electric voltage along axons and chemical materials transfered via synaptic connections. The phase structure of the model at finite temperatures is examined by the mean-field theory, and Coulomb, Higgs and confinement phases are obtained. By comparing with the result of the Z(2) model, the quantum effects is shown to weaken the ability of learning and recalling.

Yukari Fujita; Tetsuo Matsui

2002-06-30T23:59:59.000Z

38

A gauge invariant exact renormalization group I  

E-Print Network (OSTI)

A manifestly gauge invariant continuous renormalization group flow equation is constructed for pure SU(N) gauge theory. The formulation makes sense without gauge fixing and manifestly gauge invariant calculations may thus be carried out. The flow equation is naturally expressed in terms of fluctuating Wilson loops, with the effective action appearing as an integral over a `gas' of Wilson loops. At infinite N, the effective action collapses to a path integral over the trajectory of a single particle describing one Wilson loop. We show that further regularization of these flow equations is needed. (This is introduced in part II.)

Tim R. Morris

1999-10-06T23:59:59.000Z

39

Thread gauge for tapered threads  

DOE Patents (OSTI)

The thread gauge permits the user to determine the pitch diameter of tapered threads at the intersection of the pitch cone and the end face of the object being measured. A pair of opposed anvils having lines of threads which match the configuration and taper of the threads on the part being measured are brought into meshing engagement with the threads on opposite sides of the part. The anvils are located linearly into their proper positions by stop fingers on the anvils that are brought into abutting engagement with the end face of the part. This places predetermined reference points of the pitch cone of the thread anvils in registration with corresponding points on the end face of the part being measured, resulting in an accurate determination of the pitch diameter at that location. The thread anvils can be arranged for measuring either internal or external threads. 13 figures.

Brewster, A.L.

1994-01-11T23:59:59.000Z

40

Thread gauge for tapered threads  

DOE Patents (OSTI)

The thread gauge permits the user to determine the pitch diameter of tapered threads at the intersection of the pitch cone and the end face of the object being measured. A pair of opposed anvils having lines of threads which match the configuration and taper of the threads on the part being measured are brought into meshing engagement with the threads on opposite sides of the part. The anvils are located linearly into their proper positions by stop fingers on the anvils that are brought into abutting engagement with the end face of the part. This places predetermined reference points of the pitch cone of the thread anvils in registration with corresponding points on the end face of the part being measured, resulting in an accurate determination of the pitch diameter at that location. The thread anvils can be arranged for measuring either internal or external threads.

Brewster, Albert L. (R.R. #2, Box 264, Pleasant Hill, MO 64080)

1994-01-11T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Can (Electric-Magnetic) Duality Be Gauged?  

E-Print Network (OSTI)

There exists a formulation of the Maxwell theory in terms of two vector potentials, one electric and one magnetic. The action is then manifestly invariant under electric-magnetic duality transformations, which are rotations in the two-dimensional internal space of the two potentials, and local. We ask the question: can duality be gauged? The only known and battled-tested method of accomplishing the gauging is the Noether procedure. In its decanted form, it amounts to turn on the coupling by deforming the abelian gauge group of the free theory, out of whose curvatures the action is built, into a non-abelian group which becomes the gauge group of the resulting theory. In this article, we show that the method cannot be successfully implemented for electric-magnetic duality. We thus conclude that, unless a radically new idea is introduced, electric-magnetic duality cannot be gauged. The implication of this result for supergravity is briefly discussed.

Claudio Bunster; Marc Henneaux

2010-11-25T23:59:59.000Z

42

Flavor mixing in gauge-Higgs unification  

SciTech Connect

Gauge-Higgs unification is the fascinating scenario solving the hierarchy problem without supersymmetry. In this scenario, the Standard Model (SM) Higgs doublet is identified with extra component of the gauge field in higher dimensions and its mass becomes finite and stable under quantum corrections due to the higher dimensional gauge symmetry. On the other hand, Yukawa coupling is provided by the gauge coupling, which seems to mean that the flavor mixing and CP violation do not arise at it stands. In this talk, we discuss that the flavor mixing is originated from simultaneously non-diagonalizable bulk and brane mass matrices. Then, this mechanism is applied to various flavor changing neutral current (FCNC) processes via Kaluza-Klein (KK) gauge boson exchange at tree level and constraints for compactification scale are obtained.

Adachi, Y.; Kurahashi, N.; Lim, C. S.; Maru, N.; Tanabe, K. [Department of Sciences, Matsue College of Technology, Matsue 690-8518 (Japan); Department of Physics, Kobe University, Kobe 657-8501 (Japan); Department of Physics, and Research and Education Center for Natural Sciences, Keio University, Yokohama 223-8521 (Japan); Department of Physics, Kobe University, Kobe 657-8501 (Japan)

2012-07-27T23:59:59.000Z

43

Gauging Improvements in Urban Building Energy Policy in India  

NLE Websites -- All DOE Office Websites (Extended Search)

Gauging Improvements in Urban Building Energy Policy in India Title Gauging Improvements in Urban Building Energy Policy in India Publication Type Conference Proceedings Year of...

44

Thermodynamics, Hydrodynamics and Critical Phenomena in Strongly Coupled Gauge Theories.  

E-Print Network (OSTI)

??The gauge theory / string theory correspondence has led to great progress in the study of strongly-coupled gauge theories. In this work, we start with… (more)

Pagnutti, Christopher

2011-01-01T23:59:59.000Z

45

An Improved Model of Direct Gauge Mediation  

E-Print Network (OSTI)

We present a new, improved model of gauge mediation of dynamical SUSY Breaking: the model does not have gauge messengers or $\\sim 10$ TeV scalars charged under the Standard Model (SM), thus avoiding the problem of negative (mass)$^2$ for supersymmetric SM (SSM) scalars faced by some earlier models. The gauge mediation is direct, i.e., the messengers which communicate SUSY breaking to the SSM fields carry quantum numbers of the gauge group which breaks SUSY. These messenger fields couple to a modulus field. The model has a very simple particle content: the modulus and the messengers are the only chiral superfields (other than the SSM fields) in the model. The inverted hierarchy mechanism is used to generate a local SUSY breaking minimum for the modulus field in a perturbative regime thus making the model calculable.

Agashe, K S

1998-01-01T23:59:59.000Z

46

A Deep-Sea Differential Pressure Gauge  

Science Conference Proceedings (OSTI)

A pressure gauge configured to respond to the difference between the ocean pressure and the pressure within a confined volume of compressible oil is found to be especially useful for detecting pressure fluctuations in the frequency range from a ...

Charles Cox; Thomas Deaton; Spahr Webb

1984-09-01T23:59:59.000Z

47

Translational-invariant noncommutative gauge theory  

Science Conference Proceedings (OSTI)

A generalized translational-invariant noncommutative field theory is analyzed in detail, and a complete description of translational-invariant noncommutative structures is worked out. The relevant gauge theory is described, and the planar and nonplanar axial anomalies are obtained.

Ardalan, F. [Department of Physics, Sharif University of Technology, P.O. Box 11155-9161, Tehran (Iran, Islamic Republic of); Institute for Studies in Theoretical Physics and Mathematics (IPM), School of Physics, P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); Sadooghi, N. [Department of Physics, Sharif University of Technology, P.O. Box 11155-9161, Tehran (Iran, Islamic Republic of)

2011-01-15T23:59:59.000Z

48

Galilean Covariance versus Gauge Invariance Germain Rousseaux  

E-Print Network (OSTI)

existence of a superior principle called Gauge Symmetry which would rule all the laws of Physics: Phys- ical-343, 1997. [17] E. Guyon, J.-P. Hulin, L. Petit and C. D. Mitescu, Phys- ical Hydrodynamics, Oxford

Paris-Sud XI, Université de

49

GAUGE AND HIGGS BOSONS --- 1998 UPDATE  

NLE Websites -- All DOE Office Websites (Extended Search)

GAUGE AND HIGGS BOSONS in the 1998 Review of Particle Physics Please use this CITATION: C. Caso et al. (Particle Data Group), The European Physical Journal C3 (1998) 1 Cut-off date...

50

Temporal Sampling Requirements for Automatic Rain Gauges  

Science Conference Proceedings (OSTI)

Automatic rain gauges are needed to obtain rainfall statistics from remote locations and platforms. Many of these platforms cannot be serviced regularly, thus requiring unattended operations for many months. At such locations there is often a ...

Jeffrey A. Nystuen

1998-12-01T23:59:59.000Z

51

Towards Gravity-Gauge-Higgs Unification  

E-Print Network (OSTI)

We discuss a possibility to solve the gauge hierarchy problem in the framework of Gravity-Gauge-Higgs Unification scenario. We have calculated 1-loop correction to the mass of the scalar field, which is originated from 55-component of the metric, in five dimensional gravity theory with the bulk scalar field compactified on S^1. It is shown that the quadratic divergences are canceled and the finite mass is generated by explicit diagrammatic calculations and the effective potential calculations.

K. Hasegawa; C. S. Lim; Nobuhito Maru

2004-08-24T23:59:59.000Z

52

Chaotic thermalization in classical gauge theories  

SciTech Connect

We explore the idea that chaos concepts might be useful for understanding the thermalization in gauge theories. The SU(2) Higgs model is discussed as a prototype of system with gauge fields coupled to matter fields. Through the numerical solution of the equations of motion, we are able to characterize chaotic behavior via the corresponding Lyapunov exponent. Then it is demonstrated that the system's approach to equilibrium can be understood through direct application of the principles of Statistical Mechanics.

Woitek, Marcio; Krein, Gastao [Instituto de Fisica Teorica, Universidade Estadual Paulista Rua Dr. Bento Teobaldo Ferraz, 271 - Bloco II, Sao Paulo, SP (Brazil)

2013-05-06T23:59:59.000Z

53

Quantum simulations of gauge theories with ultracold atoms: local gauge invariance from angular momentum conservation  

E-Print Network (OSTI)

Quantum simulations of High Energy Physics, and especially of gauge theories, is an emerging and exciting direction in quantum simulations. However, simulations of such theories, compared to simulations of condensed matter physics, must satisfy extra restrictions, such as local gauge and Lorentz invariance. In this paper we discuss these special requirements, and present a new method for quantum simulation of lattice gauge theories using ultracold atoms. This method allows to include local gauge invariance as a fundamental symmetry of the atomic Hamiltonian, arising from natural atomic interactions and conservation laws (and not as a property of a low energy sector). This allows us to implement elementary gauge invariant interactions for three lattice gauge theories: compact QED (U(1)), SU(N) and Z_N, which can be used to build quantum simulators in 1+1 dimensions. We also present a new loop method, which uses the elementary interactions as building blocks in the effective construction of quantum simulations for d+1 dimensional lattice gauge theories (d>1), without having to use Gauss's law as a constraint, as in previous proposals. We discuss in detail the quantum simulation of 2+1 dimensional compact QED and provide a numerical proof of principle. The simplicity of the already gauge invariant elementary interactions of this model suggests it may be useful for future experimental realizations.

Erez Zohar; J. Ignacio Cirac; Benni Reznik

2013-03-20T23:59:59.000Z

54

Gauge-Higgs Unification in six dimensions  

E-Print Network (OSTI)

Motivated by the pressing problem of the ``little hierarchies'', the possibility of realizing a consistent model of Electroweak Symmetry Breaking via the so-called ``Gauge-Higgs Unification Mechanism'' is discussed. We identify a class of 6 dimensional SU(3) gauge models in which a single Higgs doublet originates from the internal components of the gauge fields. The Higgs mass is beautifully predicted at the tree-level to be twice the $W$-boson mass. At the quantum level, a 1-loop quadratically divergent localized operator is generated and it can contribute to the Higgs mass, reintroducing then the little hierarchy problem. We show that, in some particular case, the presence of this operator does not destabilize the Electroweak Symmetry Breaking Scale and we obtain a framework in which realistic models could be formulated.

Andrea Wulzer

2004-05-19T23:59:59.000Z

55

Feynman rules for Coulomb gauge QCD  

Science Conference Proceedings (OSTI)

The Coulomb gauge in nonabelian gauge theories is attractive in principle, but beset with technical difficulties in perturbation theory. In addition to ordinary Feynman integrals, there are, at 2-loop order, Christ-Lee (CL) terms, derived either by correctly ordering the operators in the Hamiltonian, or by resolving ambiguous Feynman integrals. Renormalization theory depends on the sub-graph structure of ordinary Feynman graphs. The CL terms do not have a sub-graph structure. We show how to carry out renormalization in the presence of CL terms, by re-expressing these as 'pseudo-Feynman' integrals. We also explain how energy divergences cancel. - Highlights: Black-Right-Pointing-Pointer In Coulomb gauge QCD, we re-express Christ-Lee terms in the Hamiltonian as pseudo-Feynman integrals. Black-Right-Pointing-Pointer This gives a subgraph structure, and allows the ordinary renormalization process. Black-Right-Pointing-Pointer It also leads to cancellation of energy-divergences.

Andrasi, A. [Rudjer Boskovic Institute, Zagreb (Croatia)] [Rudjer Boskovic Institute, Zagreb (Croatia); Taylor, J.C., E-mail: jct@damtp.cam.ac.uk [Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge (United Kingdom)

2012-10-15T23:59:59.000Z

56

Signatures of confinement in axial gauge QCD  

SciTech Connect

A comparative dynamical study of axial gauge QED and QCD is presented. Elementary excitations associated with particular field configurations are investigated. Gluonic excitations analogous to linearly polarized photons are shown to acquire infinite energy. Suppression of this class of excitations in QCD results from quantization of the chromo-electric flux and is interpreted as a dual Meissner effect, i.e., as expulsion from the QCD vacuum of chromo-electric fields which are constant over significant distances. This interpretation is supported by a comparative evaluation of the interaction energy of static charges in the axial gauge representation of QED and QCD. {copyright} 1995 Academic Press, Inc.

Lenz, F. [Institute for Theoretical Physics, University of Erlangen-Nuernberg, Staudtstrasse 7, 91058 Erlangen (Germany)]|[Center for Theoretical Physics, Laboratory for Nuclear Science, MIT, Cambridge, Massachusetts 02139 (United States); Moniz, E.J. [Center for Theoretical Physics, Laboratory for Nuclear Science, MIT, Cambridge, Massachusetts 02139 (United States)]|[Institute for Theoretical Physics, University of Erlangen-Nuernberg, Staudtstrasse 7, 91058 Erlangen (Germany); Thies, M. [Institute for Theoretical Physics, University of Erlangen-Nuernberg, Staudtstrasse 7, 91058 Erlangen (Germany)

1995-09-01T23:59:59.000Z

57

Performance of stem flow gauges in greenhouse and desert environments  

DOE Green Energy (OSTI)

This study was conducted to evaluate the accuracy and general performance of a heat balance method for estimating transpirational sap flow through plant stems on two tree species in greenhouse and field experiments in Tucson, Arizona. Sap flow through 20-mm diameter stems of oak (Quercus virginiana `Heritage`) and mesquite (Prosopis alba `Colorado`.) trees in containers was measured using stem flow gauges and a precision balance, from January to October, 1991. Overall gauge accuracy, and the effects of gauge location on the tree stem, gauge ventilation, gauge insulation, sheath conductance factor (Ksh) selection method, and increased numbers of vertical thermocouple pairs on gauge performance were evaluated.

Levitt, D.G. [Reynolds Electrical and Engineering Co., Inc., Las Vegas, NV (United States); Simpson, J.R. [California Univ., Davis, CA (United States). Dept. of Environmental Horticulture; Tipton, J.L. [Arizona Univ., Tucson, AZ (United States). Dept. of Plant Sciences

1995-06-01T23:59:59.000Z

58

Gauged Axions and their QCD Interactions  

Science Conference Proceedings (OSTI)

We present a brief overview of axion models associated to anomalous abelian (gauge) symmetries, discussing their main phenomenological features. Among these, the mechanism of vacuum misalignment introduced at the QCD and at the electroweak phase transitions, with the appearance of periodic potentials, responsible for the generation of a mass for these types of axions.

Coriano, Claudio; Mariano, Antonio [Dipartimento di Fisica, Universita del Salento and INFN Sezione di Lecce, Via Arnesano 73100 Lecce (Italy); Guzzi, Marco [Department of Physics, Southern Methodist University, Dallas, TX 75275-0175 (United States)

2010-12-22T23:59:59.000Z

59

Cosmological properties of a gauged axion  

SciTech Connect

We analyze the most salient cosmological features of axions in extensions of the standard model with a gauged anomalous extra U(1) symmetry. The model is built by imposing the constraint of gauge invariance in the anomalous effective action, which is extended with Wess-Zumino counterterms. These generate axionlike interactions of the axions to the gauge fields and a gauged shift symmetry. The scalar sector is assumed to acquire a nonperturbative potential after inflation, at the electroweak phase transition, which induces a mixing of the Stueckelberg field of the model with the scalars of the electroweak sector, and at the QCD phase transition. We discuss the possible mechanisms of sequential misalignments which could affect the axions of these models, and generated, in this case, at both transitions. We compute the contribution of these particles to dark matter, quantifying their relic densities as a function of the Stueckelberg mass. We also show that models with a single anomalous U(1) in general do not account for the dark energy, due to the presence of mixed U(1)-SU(3) anomalies.

Coriano, Claudio; Mariano, Antonio [Dipartimento di Fisica, Universita del Salento, Via Arnesano 73100 Lecce (Italy) and INFN Sezione di Lecce, Via Arnesano 73100 Lecce (Italy); Guzzi, Marco [Department of Physics, Southern Methodist University, Dallas Texas 75275 (United States); Lazarides, George [Physics Division, School of Technology, Aristotle University of Thessaloniki, Thessaloniki 54124 (Greece)

2010-09-15T23:59:59.000Z

60

Exotic Gauge Bosons in the 331 Model  

SciTech Connect

We analize the bosonic sector of the 331 model which contains exotic leptons, quarks and bosons (E,J,U,V) in order to satisfy the weak gauge SU(3){sub L} invariance. We develop the Feynman rules of the entire kinetic bosonic sector which will let us to compute some of the Z(0)' decays modes.

Romero, D.; Ravinez, O.; Diaz, H.; Reyes, J. [Instituto de Fisica Universidad Nacional de Ingenieria (Peru)

2009-04-30T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Gauge Theories, D-Branes and Holography  

E-Print Network (OSTI)

Based on a generalization of the string theoretic concept of D-brane probe, we propose a new approach to large N gauge theories which makes the holographic properties manifest. For any gauge theory, we define from first principles an effective action for a fixed number of "probe" D-branes in the presence of N "background" D-branes on which the gauge theory lives. This effective action is shown to encode all the information about the large N gauge theory. The analysis of the planar diagram expansion which computes the effective action yields a simple and generic mechanism explaining the emergence of holographic space dimensions: the probe D-branes move in a higher dimensional dual holographic space-time. The construction yields a new perspective on the notion of bulk space-time locality and draws unexpected links with some aspects of the 't Hooft Abelian projection ideas. It also provides a new non-perturbative approximation scheme, able to capture both the weak and strong coupling regimes. We sketchily illustrate the basic ideas on a few examples, including the pure four dimensional Yang-Mills theory.

Frank Ferrari

2013-10-24T23:59:59.000Z

62

The Optimization and Calibration of a Rain Intensity Gauge  

Science Conference Proceedings (OSTI)

The high temporal variability of rainfall requires that measurements be taken at a high frequency for that variability to be recorded well, but most conventional gauges do not have this capability. The gauge described has a resolution estimated ...

John Sansom; Warren R. Gray

2002-01-01T23:59:59.000Z

63

Intercomparison of Recording and Standard Nonrecording U.S. Gauges  

Science Conference Proceedings (OSTI)

Existing adjustment procedures for precipitation measured by the 8-in. standard nonrecording rain gauge (SNRG) take into account gauge undercatch mostly due to wind-induced turbulence over its orifice. The goal of this paper is to “reduce” the ...

Pavel Ya Groisman; Eugene L. Peck; Robert G. Quayle

1999-05-01T23:59:59.000Z

64

Monitoring the Stability of Satellite Altimeters with Tide Gauges  

Science Conference Proceedings (OSTI)

A method is described for using tide gauge sea levels to monitor time-dependent drift in satellite altimetric measurements of sea surface height. The method depends on a careful assessment of the quality of the tide gauge measurements available ...

Gary T. Mitchum

1998-06-01T23:59:59.000Z

65

A Piezoelectrical Rain Gauge for Application on Buoys  

Science Conference Proceedings (OSTI)

Rain gauge systems are required to measure rainfall data on buoys at oceanic sites that are not suited for conventional rain sensors. A piezoelectrical rain gauge has been developed for use on buoys, to provide rain measurements just above the ...

Jörg Förster; Giselher Gust; Siegfried Stolte

2004-02-01T23:59:59.000Z

66

Emerging of massive gauge particles in inhomogeneous local gauge transformations: replacement of Higgs mechanism  

E-Print Network (OSTI)

A generalized theory of gauge transformations is presented on the basis of the covariant Hamiltonian formalism of field theory, for which the covariant canonical field equations are equivalent to the Euler-Lagrange field equations. Similar to the canonical transformation theory of point dynamics, the canonical transformation rules for fields are derived from generating functions. Thus---in contrast to the usual Lagrangian description---the covariant canonical transformation formalism automatically ensures the mappings to preserve the action principle, and hence to be {\\em physical}. On that basis, we work out the theory of inhomogeneous local gauge transformations that generalizes the conventional local SU(N) gauge transformation theory. It is shown that massive gauge bosons naturally emerge in this description, which thus could supersede the Higgs mechanism.

Jürgen Struckmeier

2013-03-26T23:59:59.000Z

67

Coulomb gauge Green functions and Gribov copies in SU(2) lattice gauge theory  

E-Print Network (OSTI)

We reconsider the lattice measurement of Green functions in Coulomb gauge, both in 2+1 and 3+1 dimensions, using an improved gauge fixing scheme. The influence of Gribov copies is examined and we find clear indications that Green functions are more strongly affected than previously assumed, in particular for low momenta. Qualitatively, our improved lattice results in the infra-red compare more favourably with recent continuum calculations in the Hamiltonian approach.

M. Quandt; G. Burgio; S. Chimchinda; H. Reinhardt

2007-10-02T23:59:59.000Z

68

Prospects for Multiple Weak Gauge Boson Production at Supercollider Energies  

E-Print Network (OSTI)

We discuss the prospects for observing multiple weak gauge boson production at the SSC and LHC. We summarize conventional perturbative cross sections for processes involving 1-6 final state weak gauge bosons and compare them with more speculative scenarios including 1) a toy model of a strongly interacting Higgs sector patterned after hadronic multipion production and 2) the nonperturbative production of O(30) weak gauge bosons in a weakly coupled gauge sector.

D. A. Morris

1993-08-24T23:59:59.000Z

69

An exact RG formulation of quantum gauge theory  

E-Print Network (OSTI)

A gauge invariant Wilsonian effective action is constructed for pure SU(N) Yang-Mills theory by formulating the corresponding flow equation. Manifestly gauge invariant calculations can be performed i.e. without gauge fixing or ghosts. Regularisation is implemented in a novel way which realises a spontaneously broken SU(N|N) supergauge theory. As an example we sketch the computation of the one-loop beta function, performed for the first time without any gauge fixing.

Tim R. Morris

2001-02-19T23:59:59.000Z

70

A class of gauges for the Einstein equations  

E-Print Network (OSTI)

A class of gauges for the Einstein vacuum equations is introduced, along with three symmetric hyperbolic systems. The first implies the local realizability of the gauge. The second is the dynamical subset of the field equations. The third is used to show that the constraints propagate. The gauges are for an orthonormal frame formalism, with first order, quadratically nonlinear equations. The unknowns are 16 frame components and 28 connection components. After gauge-fixing, a total of 33 remain.

Michael Reiterer; Eugene Trubowitz

2011-04-26T23:59:59.000Z

71

Cold quark matter, quadratic corrections, and gauge/string duality  

Science Conference Proceedings (OSTI)

We make an estimate of the quadratic correction in the pressure of cold quark matter using gauge/string duality.

Andreev, Oleg [Arnold Sommerfeld Center for Theoretical Physics, LMU-Muenchen, Theresienstrasse 37, 80333 Muenchen (Germany)

2010-04-15T23:59:59.000Z

72

Determination of equivalent circuit for PVDF shock-pressure gauges  

SciTech Connect

Broadband impedance measurements of a PVDF shock-pressure gauge are used to build an equivalent circuit for the gauge. The essential components are a gauge capacitance and a low-loss transmission line. Component features are consistent with the physical characteristics. With knowledge of this circuit, troublesome oscillations can be anticipated and prevented.

Kotulski, J.D.; Anderson, M.U.; Brock, B.C.; Gomez, J.; Graham, R.A.; Vittitoe, C.N.

1993-07-01T23:59:59.000Z

73

Determination of equivalent circuit for PVDF shock-pressure gauges  

SciTech Connect

Broadband impedance measurements of a PVDF shock-pressure gauge are used to build an equivalent circuit for the gauge. The essential components are a gauge capacitance and a low-loss transmission line. Component features are consistent with the physical characteristics. With knowledge of this circuit, troublesome oscillations can be anticipated and prevented. [copyright]American Institute of Physics

Kotulski, J.D.; Anderson, M.U.; Brock, B.C.; Gomez, J.; Graham, R.A.; Vittitoe, C.N. (Sandia National Laboratories, Albuquerque, New Mexico 87185-5800 (United States))

1994-07-10T23:59:59.000Z

74

Light-induced gauge fields for ultracold atoms  

E-Print Network (OSTI)

Gauge fields are central in our modern understanding of physics at all scales. At the highest energy scales known, the microscopic universe is governed by particles interacting with each other through the exchange of gauge bosons. At the largest length scales, our universe is ruled by gravity, whose gauge structure suggests the existence of a particle - the graviton - that mediates the gravitational force. At the mesoscopic scale, solid-state systems are subjected to gauge fields of different nature: materials can be immersed in external electromagnetic fields, but they can also feature emerging gauge fields in their low-energy description. In this review, we focus on another kind of gauge field: those engineered in systems of ultracold neutral atoms. In these setups, atoms are suitably coupled to laser fields that generate effective gauge potentials in their description. Neutral atoms "feeling" laser-induced gauge potentials can potentially mimic the behavior of an electron gas subjected to a magnetic field, but also, the interaction of elementary particles with non-Abelian gauge fields. Here, we review different realized and proposed techniques for creating gauge potentials - both Abelian and non-Abelian - in atomic systems and discuss their implication in the context of quantum simulation. While most of these setups concern the realization of background and classical gauge potentials, we conclude with more exotic proposals where these synthetic fields might be made dynamical, in view of simulating interacting gauge theories with cold atoms.

N. Goldman; G. Juzeliunas; P. Ohberg; I. B. Spielman

2013-08-29T23:59:59.000Z

75

Approximate gauge symmetry of composite vector bosons  

SciTech Connect

It can be shown in a solvable field theory model that the couplings of the composite vector bosons made of a fermion pair approach the gauge couplings in the limit of strong binding. Although this phenomenon may appear accidental and special to the vector bosons made of a fermion pair, we extend it to the case of bosons being constituents and find that the same phenomenon occurs in a more intriguing way. The functional formalism not only facilitates computation but also provides us with a better insight into the generating mechanism of approximate gauge symmetry, in particular, how the strong binding and global current conservation conspire to generate such an approximate symmetry. Remarks are made on its possible relevance or irrelevance to electroweak and higher symmetries.

Suzuki, Mahiko [Lawrence Berkeley National Laboratory and Department of Physics, University of California, Berkeley, California 94720 (United States)

2010-08-15T23:59:59.000Z

76

Approximate gauge symemtry of composite vector bosons  

SciTech Connect

It can be shown in a solvable field theory model that the couplings of the composite vector mesons made of a fermion pair approach the gauge couplings in the limit of strong binding. Although this phenomenon may appear accidental and special to the vector bosons made of a fermion pair, we extend it to the case of bosons being constituents and find that the same phenomenon occurs in more an intriguing way. The functional formalism not only facilitates computation but also provides us with a better insight into the generating mechanism of approximate gauge symmetry, in particular, how the strong binding and global current conservation conspire to generate such an approximate symmetry. Remarks are made on its possible relevance or irrelevance to electroweak and higher symmetries.

Suzuki, Mahiko

2010-06-01T23:59:59.000Z

77

Search for new heavy charged gauge bosons  

SciTech Connect

Additional gauge bosons are introduced in many theoretical extensions to the Standard Model. A search for a new heavy charged gauge boson W{prime} decaying into an electron and a neutrino is presented. The data used in this analysis was taken with the D0 detector at the Fermilab proton-antiproton collider at a center-of-mass energy of 1.96 TeV and corresponds to an integrated luminosity of about 1 fb{sup -1}. Since no significant excess is observed in the data, an upper limit is set on the production cross section times branching fraction {sigma}{sub W{prime}}xBr (W{prime} {yields} e{nu}). Using this limit, a W{prime} boson with mass below {approx}1 TeV can be excluded at the 95% confidence level assuming that the new boson has the same couplings to fermions as the Standard Model W boson.

Magass, Carsten Martin; /RWTH Aachen U.

2007-11-01T23:59:59.000Z

78

A viable axion from gauged flavor symmetries  

E-Print Network (OSTI)

We consider a string inspired non-supersymmetric extension of the standard model with gauged anomalous U(1) flavor symmetries. Consistency requires the Green-Schwarz mechanism to cancel mixed anomalies. The additional required scalars provide Stuckelberg masses for the $Z'$ particles associated to the gauged flavor symmetry, so they decouple at low energies. Our models also include a complex scalar field $\\phi$ to generate Froggatt-Nielsen mass terms for light particles giving a partial solution to the fermion mass problem. A residual approximate (anomalous) global symmetry survives at low energies. The associated pseudo-Goldstone mode is the phase of the $\\phi$ scalar field, and it becomes the dominant contribution to the physical axion. An effective field theory analysis that includes neutrino masses gives a prediction for the axion decay constant. We find a simple modeI where the axion decay constant is in the center of the allowed window.

Berenstein, David

2010-01-01T23:59:59.000Z

79

Chiral symmetry and lattice gauge theory  

E-Print Network (OSTI)

I review the problem of formulating chiral symmetry in lattice gauge theory. I discuss recent approaches involving an infinite tower of additional heavy states to absorb Fermion doublers. For hadronic physics this provides a natural scheme for taking quark masses to zero without requiring a precise tuning of parameters. A mirror Fermion variation provides a possible way of extending the picture to chirally coupled light Fermions. Talk presented at "Quark Confinement and the Hadron Spectrum," Como, Italy, 20-24 June 1994.

Michael Creutz

1994-10-19T23:59:59.000Z

80

Chiral symmetry and lattice gauge theory  

Science Conference Proceedings (OSTI)

I review the problem of formulating chiral symmetry in lattice gauge theory. I discuss recent approaches involving an infinite tower of additional heavy states to absorb Fermion doublers. For hadronic physics this provides a natural scheme for taking quark masses to zero without requiring a precise tuning of parameters. A mirror Fermion variation provides a possible way of extending the picture to chirally coupled light Fermions.

Creutz, M.

1994-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Neutrino and Z gauge boson physics  

SciTech Connect

We present a short review of the physics of neutrino-photon interactions and the rare decays of the Z and Z Prime gauge bosons. In particular, we emphasize on processes induced by the anomalous trilinear and quartic vertices VVV and VVVV, where V=Z,Z Prime or a photon, within the Standard Model (SM), the 331 model and some extensions of the SM. We also include the phenomenological and experimental limits reported for these couplings.

Larios, F. [Departamento de Fisica Aplicada, CINVESTAV-Merida, A.P. 73, 97310 Merida, Yucatan (Mexico); Perez, M. A. [Departamento de Fisica, CINVESTAV, A.P. 14-740, 07000, Mexico D.F (Mexico)

2013-06-12T23:59:59.000Z

82

The gauged BPS baby Skyrme model  

E-Print Network (OSTI)

The baby Skyrme model is a well-known nonlinear field theory supporting topological solitons in two space dimensions. In the limit where the term quadratic in derivatives (the "sigma model term") vanishes some additional structure emerges. The resulting ("extreme" or "restricted" or "BPS") baby Skyrme model has exact soliton solutions saturating a BPS bound which exists for this restricted model. Further, the restricted model has infinitely many symmetries and infinitely many conservation laws. Here we consider the gauged version of the restricted baby Skyrme model with gauge group U(1) and the usual Maxwell term for the gauge field. We find that, again, there exists a BPS bound and BPS solutions saturating this bound. We further find that the whole problem is essentially determined by a new kind of superpotential equation. The BPS bound and the corresponding BPS solitons only may exist for potentials such that the superpotential equation has a solution which exists globally, i.e., on the whole target space. ...

Adam, C; Sanchez-Guillen, J; Wereszczynski, A

2012-01-01T23:59:59.000Z

83

Mass spectrum and thermodynamics of quasiconformal gauge theories from gauge/gravity duality  

SciTech Connect

We use gauge/gravity duality to study simultaneously the mass spectrum and the thermodynamics of a generic quasiconformal gauge theory, specified by its beta function. The beta function of a quasiconformal theory almost vanishes, and the coupling is almost constant between two widely separated energy scales. Depending on whether the gravity dual has a black hole or not, the mass spectrum is either a spectrum of quasinormal oscillations or a normal T=0 mass spectrum. The mass spectrum is quantitatively correlated with the thermal properties of the system. As the theory approaches conformality, the masses have to vanish. We show that in this limit, the masses calculated via gauge/gravity duality satisfy expected scaling properties.

Alanen, J.; Kajantie, K. [Department of Physics, P.O. Box 64, FI-00014 University of Helsinki (Finland); Helsinki Institute of Physics, P.O. Box 64, FI-00014 University of Helsinki (Finland); Alho, T.; Tuominen, K. [Helsinki Institute of Physics, P.O. Box 64, FI-00014 University of Helsinki (Finland); Department of Physics, University of Jyvaeskylae (Finland)

2011-10-15T23:59:59.000Z

84

Aging in reversible dynamics of disordered systems. II. Emergence of the arcsine law in the random hopping time dynamics of the REM  

E-Print Network (OSTI)

Applying the new tools developed in [G1], we investigate the arcsine aging regime of the random hopping time dynamics of the REM. Our results are optimal in several ways. They cover the full time-scale and temperature domain where this phenomenon occurs. On this domain the limiting clock process and associated time correlation function are explicitly constructed. Finally, all convergence statements w.r.t. the law of the random environment are obtained in the strongest sense possible, except perhaps on the very last scales before equilibrium.

Véronique Gayrard

2010-08-23T23:59:59.000Z

85

Thread gauge for measuring thread pitch diameters  

DOE Patents (OSTI)

A thread gauge which attaches to a vernier caliper to measure the thread pitch diameter of both externally threaded and internally threaded parts is disclosed. A pair of anvils are externally threaded with threads having the same pitch as those of the threaded part. Each anvil is mounted on a stem having a ball on which the anvil can rotate to properly mate with the parts to which the anvils are applied. The stems are detachably secured to the caliper blades by attachment collars having keyhole openings for receiving the stems and caliper blades. A set screw is used to secure each collar on its caliper blade. 2 figs.

Brewster, A.L.

1985-11-19T23:59:59.000Z

86

Thread gauge for measuring thread pitch diameters  

DOE Patents (OSTI)

A thread gauge which attaches to a vernier caliper to measure the thread pitch diameter of both externally threaded and internally threaded parts. A pair of anvils are externally threaded with threads having the same pitch as those of the threaded part. Each anvil is mounted on a stem having a ball on which the anvil can rotate to properly mate with the parts to which the anvils are applied. The stems are detachably secured to the caliper blades by attachment collars having keyhole openings for receiving the stems and caliper blades. A set screw is used to secure each collar on its caliper blade.

Brewster, Albert L. (R.R. 2, Box 190A, Pleasant Hill, MO 64080)

1985-01-01T23:59:59.000Z

87

Gauge conservation laws in a general setting. Superpotential  

E-Print Network (OSTI)

The fact that the conserved current of a gauge symmetry is reduced to a superpotential is proved in a very general setting.

Sardanashvily, G

2009-01-01T23:59:59.000Z

88

A New Framework for Gauge Theory of Gravity  

Science Conference Proceedings (OSTI)

In this talk we present some conceptual new ideas to face the formulation of gauge theory including space?time symmetries. As a particular case

E. Sánchez?Sastre

2006-01-01T23:59:59.000Z

89

Generation of Neutrino Masses and Mixings in Gauge Theories  

E-Print Network (OSTI)

I review models which present large flavor mixings of the lepton sector based on the gauge theory. (Invited talk at WIN99) 1

Morimitsu Tanimoto

1999-01-01T23:59:59.000Z

90

Gauge Theories on an Interval: Unitarity Without a Higgs Boson  

E-Print Network (OSTI)

breaking without a Higgs boson. Gauge Theories on anscattering amplitude. The Higgs boson is localized at y = ?Rreal scalar ?eld, the Higgs boson. At tree level, the

Csaki, Csaba; Grojean, Christophe; Murayama, Hitoshi; Luigi, Pilo; Terning, John

2004-01-01T23:59:59.000Z

91

Divergences of generalized quantum electrodynamics on the Lorenz gauge  

Science Conference Proceedings (OSTI)

In this paper we study the Generalized Quantum Electrodynamics (GQED4) on the Lorenz gauge condition and show that divergences are still present in the theory.

Bufalo, R.; Pimentel, B. M. [Instituto de Fisica Teorica, UNESP - Sao Paulo State University P. O. Box 70532-2, 01156-970, Sao Paulo, SP (Brazil); Zambrano, G. E. [Departamento de Fisica, Universidad de Narino Calle 18 Carrera 50, San Juan de Pasto, Narino (Colombia)

2013-03-25T23:59:59.000Z

92

The role of gauge symmetry in spintronics  

SciTech Connect

In this work we employ a field theoretical approach to explain the nature of the non-conserved spin current in spintronics. In particular, we consider the usual U(1) gauge theory for the electromagnetism at classical level in order to obtain the broken continuity equation involving the spin current and spin-transfer torque. Inspired by the recent work of A. Vernes, B. L. Gyorffy and P. Weinberger where they obtain such an equation in terms of relativistic quantum mechanics, we formalize their result in terms of the well known currents of field theory such as the Bargmann-Wigner current and the chiral current. Thus, an interpretation of spintronics is provided in terms of Noether currents (conserved or not) and symmetries of the electromagnetism. In fact, the main result of the present work is that the non-conservation of the spin current is associated with the gauge invariance of physical observables where the breaking term is proportional to the chiral current. Moreover, we generalize their result by including the electromagnetic field as a dynamical field instead of an external one.

Sobreiro, R.F., E-mail: sobreiro@if.uff.br [UFF - Universidade Federal Fluminense, Instituto de Fisica, Campus da Praia Vermelha, Av. General Milton Tavares de Souza s/n, 24210-346, Niteroi, RJ (Brazil); Vasquez Otoya, V.J. [IFSEMG - Instituto Federal de Educacao, Ciencia e Tecnologia do Sudeste de Minas Gerais, Rua Bernardo Mascarenhas 1283, 36080-001, Juiz de Fora, MG (Brazil)

2011-12-15T23:59:59.000Z

93

The Higgs sector of gravitational gauge theories  

E-Print Network (OSTI)

Gravitational gauge theories with de Sitter, Poincare and affine symmetry group are investigated under the aspect of the breakdown of the initial symmetry group down to the Lorentz subgroup. We review the theory of spontaneously broken de Sitter gravity by Stelle and West and apply a similar approach to the case of the Poincare and affine groups. Especially, we find that the groundstate of the metric affine theory leads to the determination of the Lorentzian signature of the metric in the groundstate. We show that the Higgs field remains in its groundstate, i.e., that the metric will have Lorentzian signature, unless we introduce matter fields that explicitely couple to the symmetric part of the connection. We also show that some features, like the necessity of the introduction of a dilaton field, that seem artificial in the context of the affine theory, appear most natural if the gauge group is taken to be the special linear group in five dimensions. Finally, we present an alternative model which is based on the spinor representation of the Lorentz group and is especially adopted to the description of spinor fields in a general linear covariant way, without the use of the infinite dimensional representations which are usually considered to be unavoidable.

M. Leclerc

2005-02-02T23:59:59.000Z

94

IDENTIFYING ABBERANT SEGMENTS IN PERMANENT DOWNHOLE GAUGE DATA  

E-Print Network (OSTI)

for interpretation of subsurface conditions in a well. The data from permanent downhole gauges are voluminous the world supplying continuous real time data about subsurface reservoir conditions. Permanent downhole gauges are used in reservoir monitoring and management by interpreting the pressure, flow rate

95

Search for gauge extensions of the MSSM at the LHC  

SciTech Connect

The extensions of the minimal supersymmetric model (MSSM), driving mainly from the need to solve the {mu} problem, involve novel matter species and gauge groups. These extended MSSM models can be searched for at the LHC via the effects of the gauge and Higgs bosons or their fermionic partners. Traditionally, the focus has been on the study of the extra forces induced by the new gauge and Higgs bosons present in such models. An alternative way of studying such effects is through the superpartners of matter species and the gauge forces. We thus consider a U(1)' gauge extension of the MSSM, and perform an extensive study of the signatures of the model through the production and decays of the scalar quarks and gluino, which are expected to be produced copiously at the LHC. After a detailed study of the distinctive features of such models with regard to the signatures at the LHC, we carry out a detailed Monte Carlo analysis of the signals from the process pp{yields}n leptons+m jets+Ee{sub T}, and compare the resulting distributions with those predicted by the MSSM. Our results show that the searches for the extra gauge interactions in the supersymmetric framework can proceed not only through the forces mediated by the gauge and Higgs bosons but also through the superpartner forces mediated by the gauge and Higgs fermions. Analysis of the events induced by the squark/gluino decays presented here is complementary to the direct Z' searches at the LHC.

Ali, Ahmed [Deutsches Elektronen - Synchrotron DESY, Notkestr. 85, D-22603 Hamburg (Germany); Demir, Durmus A. [Deutsches Elektronen - Synchrotron DESY, Notkestr. 85, D-22603 Hamburg (Germany); Department of Physics, Izmir Institute of Technology, IZTECH, TR35430 Izmir (Turkey); Frank, Mariana; Turan, Ismail [Department of Physics, Concordia University, 7141 Sherbrooke St. West, Montreal, Quebec, H4B 1R6 (Canada)

2009-05-01T23:59:59.000Z

96

Searches for new gauge bosons at future colliders  

SciTech Connect

The search reaches for new gauge bosons at future hadron and lepton colliders are summarized for a variety of extended gauge models. Experiments at these energies will vastly improve over present limits and will easily discover a Z` and/or W` in the multi-TeV range.

Rizzo, T.G.

1996-09-01T23:59:59.000Z

97

Development of a Low-Cost Tide Gauge  

Science Conference Proceedings (OSTI)

A low-cost tide gauge was developed and field tested to demonstrate a technology that would enable more cost-effective and greater sampling of spatially variable water levels and ocean surface waves. The gauge was designed to be adaptable to ...

Mark F. Giardina; Marshall D. Earle; John C. Cranford; Daniel A. Osiecki

2000-04-01T23:59:59.000Z

98

Estimating Rain Rates from Tipping-Bucket Rain Gauge Measurements  

Science Conference Proceedings (OSTI)

This paper describes the cubic spline–based operational system for the generation of the Tropical Rainfall Measuring Mission (TRMM) 1-min rain-rate product 2A-56 from tipping-bucket (TB) gauge measurements. A simulated TB gauge from a Joss–...

Jianxin Wang; Brad L. Fisher; David B. Wolff

2008-01-01T23:59:59.000Z

99

Hydrodynamic gradient expansion in gauge theory plasmas  

E-Print Network (OSTI)

We utilize the fluid-gravity duality to investigate the large order behavior of hydrodynamic gradient expansion of the dynamics of a gauge theory plasma system. This corresponds to the inclusion of dissipative terms and transport coefficients of very high order. Using the dual gravity description, we calculate numerically the form of the stress tensor for a boost-invariant flow in a hydrodynamic expansion up to terms with 240 derivatives. We observe a factorial growth of gradient contributions at large orders, which indicates a zero radius of convergence of the hydrodynamic series. Furthermore, we identify the leading singularity in the Borel transform of the hydrodynamic energy density with the lowest nonhydrodynamic excitation corresponding to a `nonhydrodynamic' quasinormal mode on the gravity side.

Michal P. Heller; Romuald A. Janik; Przemyslaw Witaszczyk

2013-02-04T23:59:59.000Z

100

Bulk Higgs with 4D Gauge Interactions  

E-Print Network (OSTI)

We consider a model with an extra compact dimension in which the Higgs is a bulk field while all other Standard Model fields are confined on a brane. We find that four-dimensional gauge invariance can still be achieved by appropriate modification of the brane action. This changes accordingly the Higgs propagator so that, the Higgs, in all its interactions with Standard Model fields, behaves as an ordinary 4D field, although it has a bulk kinetic term and bulk self-interactions. In addition, it cannot propagate from the brane to the bulk and, thus, no charge can escape into the bulk but it remains confined on the brane. Moreover, the photon remains massless, while the dependence of the Higgs vacuum on the extra dimension induces a mixing between the graviphoton and the Z-boson. This results in a modification of the sensitive \\rho-parameter.

Alex Kehagias; Kyriakos Tamvakis

2005-07-14T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Gauge field localization on brane worlds  

Science Conference Proceedings (OSTI)

We consider the effects of spacetime curvature and brane thickness on the localization of gauge fields on a brane via kinetic terms induced by localized fermions. We find that in a warped geometry with an infinitely thin brane, both the infrared and the ultraviolet behavior of the electromagnetic propagator are affected, providing a more stringent bound on the brane's tension than that coming from the requirement of four-dimensional gravity on the brane. On the other hand, for a thick wall in a flat spacetime, where the fermions are localized by means of a Yukawa coupling, we find that four-dimensional electromagnetism is recovered in a region bounded from above by the same critical distance appearing in the thin case, but also from below by a new scale related to the brane's thickness and the electromagnetic couplings. This imposes very stringent bounds on the brane's thickness which seem to invalidate the localization mechanism for this case.

Guerrero, Rommel; Rodriguez, R. Omar [Departamento de Fisica, Universidad Centroccidental Lisandro Alvarado, 400 Barquisimeto (Venezuela, Bolivarian Republic of); Melfo, Alejandra; Pantoja, Nelson [Centro de Fisica Fundamental, Universidad de Los Andes, Merida (Venezuela, Bolivarian Republic of)

2010-04-15T23:59:59.000Z

102

Former Auto Worker Gauges Efficiency of American Homes | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Former Auto Worker Gauges Efficiency of American Homes Former Auto Worker Gauges Efficiency of American Homes Former Auto Worker Gauges Efficiency of American Homes December 2, 2009 - 5:20pm Addthis Joshua DeLung Doing good deeds for others is what Pete Boogaart in Holland, Mich., is all about. Pete, who's a married empty-nester with four kids, lost his job in January after keeping Americans safe and comfortable by testing car parts for the last 15 years. But through volunteering for a local action agency, he retooled his old skills and scored a new job as a weatherization inspector. His experience using gauges and other testing equipment made him a shoo-in. When he was in the car industry, he used gauges to test everything, down to the latch that holds the center console closed. "There are certain mandatory tests in weatherization that you have to do

103

Former Auto Worker Gauges Efficiency of American Homes | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Former Auto Worker Gauges Efficiency of American Homes Former Auto Worker Gauges Efficiency of American Homes Former Auto Worker Gauges Efficiency of American Homes December 2, 2009 - 5:20pm Addthis Joshua DeLung Doing good deeds for others is what Pete Boogaart in Holland, Mich., is all about. Pete, who's a married empty-nester with four kids, lost his job in January after keeping Americans safe and comfortable by testing car parts for the last 15 years. But through volunteering for a local action agency, he retooled his old skills and scored a new job as a weatherization inspector. His experience using gauges and other testing equipment made him a shoo-in. When he was in the car industry, he used gauges to test everything, down to the latch that holds the center console closed. "There are certain mandatory tests in weatherization that you have to do

104

Atomic Quantum Simulation of Lattice Gauge-Higgs Model: Higgs Couplings and Emergence of Exact Local Gauge Symmetry  

E-Print Network (OSTI)

Recently, the possibility of quantum simulation of dynamical gauge fields was pointed out by using a system of cold atoms trapped on each link in an optical lattice. However, to implement exact local gauge invariance, fine-tuning the interaction parameters among atoms is necessary. In the present paper, we study the effect of violation of the U(1) local gauge invariance by relaxing the fine-tuning of the parameters and showing that a wide variety of cold atoms is still to be a faithful quantum simulator for a U(1) gauge-Higgs model containing a Higgs field sitting on sites. Clarification of the dynamics of this gauge-Higgs model sheds some lights upon various unsolved problems including the inflation process of the early universe. We study the phase structure of this model by Monte Carlo simulation, and also discuss the atomic characteristics of the Higgs phase in each simulator.

Kenichi Kasamatsu; Ikuo Ichinose; Tetsuo Matsui

2012-12-20T23:59:59.000Z

105

The confining N = 1 supersymmetric gauge theories: A review  

Science Conference Proceedings (OSTI)

The authors give a classification and overview of the confining N = 1 supersymmetric gauge theories. For simplicity they consider only theories based on simple gauge groups and no tree-level superpotential. Classification of these theories can be done according to whether or not there is a superpotential generated for the confined degrees of freedom. The theories with the superpotential include s-confining theories and also theories where the gauge fields participate in the confining spectrum, while theories with no superpotential include theories with a quantum deformed moduli space and theories with an affine moduli space.

Csaki, C. [Univ. of California, Berkeley, CA (United States). Dept. of Physics]|[Lawrence Berkeley National Lab., CA (United States). Physics Div.

1998-08-01T23:59:59.000Z

106

Multi-Higgs Mass Spectrum in Gauge-Higgs Unification  

E-Print Network (OSTI)

We study an SU(2) supersymmetric gauge model in a framework of gauge-Higgs unification. Multi-Higgs spectrum appears in the model at low energy. We develop a useful perturbative approximation scheme for evaluating effective potential to study the multi-Higgs mass spectrum. We find that both tree-massless and massive Higgs scalars obtain mass corrections of similar size from finite parts of the loop effects. The corrections modify multi-Higgs mass spectrum, and hence, the loop effects are significant in view of future verifications of the gauge-Higgs unification scenario in high-energy experiments.

Kojima, Kentaro; Yamashita, Toshifumi

2008-01-01T23:59:59.000Z

107

DS1922/DS1923 Battery Gas Gauge  

E-Print Network (OSTI)

Abstract: Tracking remaining available energy is critical for battery-operated equipment. Energy consumption depends on the temperature and usage history of the product. With temperature loggers, this data is largely a byproduct of normal use. This application note shows how to estimate the energy consumed during a mission and how to use the OneWireViewer to maintain a battery "gas gauge " in the memory of the logger. Motivation—The Need to Know The reliability of portable equipment depends on the status of the energy source. The best equipment cannot function properly with a low battery. For rechargeable batteries as in cell phones, sophisticated battery monitors are now the norm. Is there a way to determine the remaining charge of a conventional battery? In the case of a temperature logger, how can one know whether there is enough power for the next mission? Precondition Batteries lose energy over time through self-discharge (aging) and through normal use when the equipment is switched on. Both the rate of battery self-discharge and the energy consumption of a silicon chip strongly depend on the temperature. The higher the temperature, the higher the energy consumption. If one knows the charge of a fresh battery, the temperature history, and the discharge rate during normal use, one has all the data needed to estimate the battery's remaining charge. The initial battery charge, measured in mAh, is found in battery data sheets. The challenging

unknown authors

2006-01-01T23:59:59.000Z

108

Building Energy Software Tools Directory: EnergyGauge Summit Premier  

NLE Websites -- All DOE Office Websites (Extended Search)

EnergyGauge Summit Premier EnergyGauge Summit Premier EnergyGauge Summit Premier logo EnergyGauge Summit Premier offers automatic reference building generation allowing considerable time savings for analyzing buildings for code compliance and green building certification. After entering a building, the software can automatically compare the building to ASHRAE Standard 90.1 2001, 2004 or 2007 reference building models, and for the appropriate building types, the ASHRAE Advanced design guidelines. Additional capabilities include the ability to run a whole building simulation as per ASHRAE Standard 90.1 Appendix G guidelines for LEED New Construction 2.2, and for computing Federal Tax Deductions as per EPACT 2005 guidelines from the Internal Revenue Service (IRS) and DOE. The software also offers the

109

Soil Density/Moisture Gauge | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Soil Density/Moisture Gauge Soil Density/Moisture Gauge Soil Density/Moisture Gauge This scenario provides the planning instructions, guidance, and evaluation forms necessary to conduct an exercise involving a highway shipment of a soil moisture/density gauge (Class 7 - Radioactive). This exercise manual is one in a series of five scenarios developed by the Department of Energy Transportation Emergency Preparedness Program (TEPP). Responding agencies may include several or more of the following: local municipal and county fire, police, sheriff and Emergency Medical Services (EMS) personnel; state, local, and federal emergency response teams; emergency response contractors; and other emergency response resources that could potentially be provided by the carrier and the originating facility (shipper).

110

On relationship of gauge transformation with Wigner's little group  

E-Print Network (OSTI)

Wigner's little group of a massless particle is ISO(2) which contains rotation and two translations. As well-known, eigenvalues of the rotation are helicity. On the other hand, by S. Weinberg et al., it has been shown that two translations generate abelian gauge transformation by acting on polarization vectors. In this paper, we include unphysical modes and show abelian case result can be generalized to the case of non-abelian gauge transformation. By including the unphysical modes, we obtain Nakanishi-Lautrup physical state condition from the requirement of unitarity of the transformation. As a result, non-abelian gauge transformation is realized as the translation of the little group which acts on gauge group. We also obtain similar results for any spacetime dimensions.

Hiroshi Yoda

2012-12-06T23:59:59.000Z

111

ATLAS Self-Siphoning Rain Gauge Error Estimates  

Science Conference Proceedings (OSTI)

This report describes sampling and error characteristics of self-siphoning rain gauges used on moored buoys designed and assembled at NOAA's Pacific Marine Environmental Laboratory (PMEL) for deployment in the tropical Pacific and Atlantic Oceans ...

Yolande L. Serra; Patrick A'Hearn; H. Paul Freitag; Michael J. McPhaden

2001-12-01T23:59:59.000Z

112

Frontiers of the Gauge Principle and the Unit of Charge  

Science Conference Proceedings (OSTI)

It is shown that the gauge principle (to be traced back to potential difference) displays a new facet as one approaches the Planck-wall: availability of naked alternatives (symbolized as (—) or (—)), (due to "squeezing" by scaleless regime). ...

Anne Magnon

2000-06-01T23:59:59.000Z

113

Window For Higgs Boson Mass From Gauge-Higgs Unification  

E-Print Network (OSTI)

We consider six dimensional gauge models compactified on the orbifold T^2/Z_N (N=2,3,4,6) such that the Standard Model (SM) Higgs doublet arises from the extra-dimensional components of the gauge field. For \\Lambda \\leq 10^{19} GeV, where \\Lambda denotes the compactification scale, we obtain 114.4 GeV \\leq m_H \\leq 164 GeV for the SM Higgs boson mass. We also consider gauge-Higgs-top and gauge-Higgs-bottom Yukawa unification which respectively yield m_H = 131^{+4}_{-5} GeV and m_H = 150^{+2}_{-2} GeV for a top quark pole mass M_t =170.9^{+1.8}_{-1.8} GeV. As a special case we recover the result m_H \\leq 132 GeV previously obtained for five dimensional models.

Ilia Gogoladze; Nobuchika Okada; Qaisar Shafi

2007-08-18T23:59:59.000Z

114

The Higgs boson as a gauge field in extra dimensions  

E-Print Network (OSTI)

I review, at a general non-technical level, the main properties of models in extra dimensions where the Higgs field is identified with some internal component of a gauge field.

Marco Serone

2005-08-01T23:59:59.000Z

115

Relative Performance of Automatic Rain Gauges under Different Rainfall Conditions  

Science Conference Proceedings (OSTI)

Six different types of automatic rain gauges, including tipping bucket, weighing, capacitance, optical, disdrometer, and acoustical sensors, were deployed for 17 months (September 1993–January 1995) at the NOAA Atlantic Oceanographic and ...

Jeffrey A. Nystuen

1999-08-01T23:59:59.000Z

116

Nonintrusive Measurement of Ocean Waves: Lidar Wave Gauge  

Science Conference Proceedings (OSTI)

In December 1999, a nonintrusive directional lidar wave gauge (LWG) was field tested at the Field Research Facility (FRF) in North Carolina. The LWG uses proven lidar technology to directly measure water surface elevation from above the water’s ...

Jennifer L. Irish; Jennifer M. Wozencraft; A. Grant Cunningham; Claudine Giroud

2006-11-01T23:59:59.000Z

117

Load cell having strain gauges of arbitrary location  

DOE Patents (OSTI)

A load cell utilizes a plurality of strain gauges mounted upon the load cell body such that there are six independent load-strain relations. Load is determined by applying the inverse of a load-strain sensitivity matrix to a measured strain vector. The sensitivity matrix is determined by performing a multivariate regression technique on a set of known loads correlated to the resulting strains. Temperature compensation is achieved by configuring the strain gauges as co-located orthogonal pairs.

Spletzer, Barry (Albuquerque, NM)

2007-03-13T23:59:59.000Z

118

Four Fermion Interactions in Non-Abelian Gauge Theory  

E-Print Network (OSTI)

We continue our earlier study of the phase structure of a SU(2) gauge theory whose action contains additional chirally invariant four fermion interactions. Our lattice theory uses a reduced staggered fermion formalism to generate two Dirac flavors in the continuum limit. In the current study we have tried to reduce lattice spacing and taste breaking effects by using an improved fermion action incorporating stout smeared links. As in our earlier study we observe two regimes; for weak gauge coupling the chiral condensate behaves as an order parameter differentiating a phase at small four fermi coupling where the condensate vanishes from a phase at strong four fermi coupling in which chiral symmetry is spontaneously broken. This picture changes qualitatively when the gauge coupling is strong enough to cause confinement; in this case we observe a first order phase transition for some critical value of the four fermi coupling associated with a strong enhancement of the chiral condensate. We observe that this critical four fermi coupling varies monotonically with bare gauge coupling - decreasing, as expected, as the gauge coupling is increased. We have checked that these results remain stable under differing levels of smearing. They appear to rule out the appearance of new fixed points associated with chirally invariant four fermion interactions in confining non abelian gauge theories.

Simon Catterall; Aarti Veernala

2013-03-25T23:59:59.000Z

119

Low-energy U(1) x USp(2M) gauge theory from simple high-energy gauge group  

E-Print Network (OSTI)

We give an explicit example of the embedding of a near BPS low-energy (U(1) x USp(2M))/Z_2 gauge theory into a high-energy theory with a simple gauge group and adjoint matter content. This system possesses degenerate monopoles arising from the high-energy symmetry breaking as well as non-Abelian vortices due to the symmetry breaking at low energies. These solitons of different codimensions are related by the exact homotopy sequences.

Sven Bjarke Gudnason; Kenichi Konishi

2010-02-04T23:59:59.000Z

120

Vortex operators in gauge field theories  

SciTech Connect

Several related aspects of the 't Hooft vortex operator are studied. The current picture of the vacuum of quantum chromodynamics, the idea of dual field theories, and the idea of the vortex operator are reviewed first. The Abelian vortex operator written in terms of elementary fields and the calculation of its Green's functions are considered. A two-dimensional solvable model of a Dirac string is presented. The expression of the Green's functions more neatly in terms of Wu and Yang's geometrical idea of sections is addressed. The renormalization of the Green's functions of two kinds of Abelian looplike operators, the Wilson loop and the vortex operator, is studied; for both operators only an overall multiplicative renormalization is needed. In the case of the vortex this involves a surprising cancellation. Next, the dependence of the Green's functions of the Wilson and 't Hooft operators on the nature of the vacuum is discussed. The cluster properties of the Green's functions are emphasized. It is seen that the vortex operator in a massive Abelian theory always has surface-like clustering. The form of Green's functions in terms of Feynman graphs is the same in Higgs and symmetric phases; the difference appears in the sum over all tadpole trees. Finally, systems having fields in the fundamental representation are considered. When these fields enter only weakly into the dynamics, a vortex-like operator is anticipated. Any such operator can no longer be local looplike, but must have commutators at long range. A U(1) lattice gauge theory with two matter fields, one singly charged (fundamental) and one doubly charged (adjoint), is examined. When the fundamental field is weakly coupled, the expected phase transitions are found. When it is strongly coupled, the operator still appears to be a good order parameter, a discontinuous change in its behavior leads to a new phase transition. 18 figures.

Polchinski, J.

1980-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Gauge coupling unification in heterotic string models with gauge mediated supersymmetry breaking  

Science Conference Proceedings (OSTI)

We calculate the weak scale minimal supersymmetric standard model spectrum starting from a heterotic string theory compactified on an anisotropic orbifold. Supersymmetry breaking is mediated by vectorlike exotics that arise naturally in heterotic string theories. The messengers that mediate supersymmetry breaking come in incomplete grand unified theory (GUT) multiplets and give rise to nonuniversal gaugino masses at the GUT scale. Models with nonuniversal gaugino masses at the GUT scale have the attractive feature of allowing for precision gauge coupling unification at the GUT scale with negligible contributions from threshold corrections near the unification scale. The unique features of this minimally supersymmetric standard model spectrum are light gluinos and also large mass differences between the lightest and the next-to-lightest neutralinos and charginos which could lead to interesting signatures at the colliders.

Anandakrishnan, Archana; Raby, Stuart [Department of Physics, Ohio State University, 191, W. Woodruff Ave, Columbus, Ohio 43210 (United States)

2011-04-01T23:59:59.000Z

122

Gauge turbulence, topological defect dynamics, and condensation in Higgs models  

E-Print Network (OSTI)

The real-time dynamics of topological defects and turbulent configurations of gauge fields for electric and magnetic confinement are studied numerically within a 2+1D Abelian Higgs model. It is shown that confinement is appearing in such systems equilibrating after a strong initial quench such as the overpopulation of the infrared modes. While the final equilibrium state does not support confinement, metastable vortex defect configurations appear in the gauge field which are found to be closely related to the appearance of physically observable confined electric and magnetic charges. These phenomena are seen to be intimately related to the approach of a non-thermal fixed point of the far-from-equilibrium dynamical evolution, signalled by universal scaling in the gauge-invariant correlation function of the Higgs field. Even when the parameters of the Higgs action do not support condensate formation in the vacuum, during this approach, transient Higgs condensation is observed. We discuss implications of these results for the far-from-equilibrium dynamics of Yang-Mills fields and potential mechanisms how confinement and condensation in non-abelian gauge fields can be understood in terms of the dynamics of Higgs models. These suggest that there is an interesting new class of dynamics of strong coherent turbulent gauge fields with condensates.

Thomas Gasenzer; Larry McLerran; Jan M. Pawlowski; Dénes Sexty

2013-07-19T23:59:59.000Z

123

Software Helps Kentucky County Gauge Energy Use | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Software Helps Kentucky County Gauge Energy Use Software Helps Kentucky County Gauge Energy Use Software Helps Kentucky County Gauge Energy Use July 27, 2010 - 1:00pm Addthis How does it work? Software tracks energy usage, greenhouse gas levels and analyzes utility bills. County could see savings and cost recoveries of $100,000 to $200,000. Information allows county to make energy usage changes and identify retrofit needs. For county officials conscious of energy efficiency, deciphering complex utility bills and identifying both municipal energy-use trends and potential savings opportunities can be complex without sophisticated software. "We knew we needed a better system," says James Bush, energy manager for Lexington-Fayette Urban County, Kentucky. Last month, the county invested $140,000 of a $2.7 million Energy

124

Building Energy Software Tools Directory: EnergyGauge USA  

NLE Websites -- All DOE Office Websites (Extended Search)

EnergyGauge USA EnergyGauge USA EnergyGauge USA logo. User-friendly residential building energy simulation which allows calculation and rating of energy use of residential buildings around the United States. ENERGYGAUGE USA, takes advantage of current generation personal computers that perform an hourly annual computer simulation in less than half a minute. Includes Manual-J system sizing analysis, and an improvement analysis mode to analyze cost-effectiveness of energy upgrades. � ENERGYGAUGE USA uses DOE-2.1E with a number of enhancements which allow superior simulation of duct air leakage and heat transfer (thermal conditions of zones in which ducts are located strongly affects performance) as well as improved calculation of air conditioners, heat pump and furnaces performance. Slab, crawlspace and basement foundation types

125

Remote high-temperature insulatorless heat-flux gauge  

DOE Patents (OSTI)

A remote optical heat-flux gauge for use in extremely high temperature environments is described. This application is possible because of the use of thermographic phosphors as the sensing media, and the omission of the need for an intervening layer of insulator between phosphor layers. The gauge has no electrical leads, but is interrogated with ultraviolet or laser light. The luminescence emitted by the two phosphor layers, which is indicative of the temperature of the layers, is collected and analyzed in order to determine the heat flux incident on the surface being investigated. The two layers of thermographic phosphor must be of different materials to assure that the spectral lines collected will be distinguishable. Spatial heat-flux measurements can be made by scanning the light across the surface of the gauge.

Noel, Bruce W. (Espanola, NM)

1993-01-01T23:59:59.000Z

126

Remote high-temperature insulatorless heat-flux gauge  

DOE Patents (OSTI)

A remote optical heat-flux gauge for use in extremely high temperature environments is described. This application is possible because of the use of thermographic phosphors as the sensing media, and the omission of the need for an intervening layer of insulator between phosphor layers. The gauge has no electrical leads, but is interrogated with ultraviolet or laser light. The luminescence emitted by the two phosphor layers, which is indicative of the temperature of the layers, is collected and analyzed in order to determine the heat flux incident on the surface being investigated. The two layers of thermographic phosphor must be of different materials to assure that the spectral lines collected will be distinguishable. Spatial heat-flux measurements can be made by scanning the light across the surface of the gauge. 3 figures.

Noel, B.W.

1993-12-28T23:59:59.000Z

127

A Quantizable Model of Massive Gauge Vector Bosons without Higgs  

E-Print Network (OSTI)

We incorporate the parameters of the gauge group G into the gauge theory of interactions through a non-linear partial-trace sigma-model Lagrangian on G/H. The minimal coupling of the new (Goldstone-like) scalar bosons provides mass terms to those intermediate vector bosons associated with the quotient G/H, without spoiling gauge invariance, remaining the H-vector potentials massless. The main virtue of a partial trace on G/H, rather than on the entire G, is that we can find an infinite-dimensional symmetry, with non-trivial Noether invariants, which ensures quantum integrability in a non-canonical quantization scheme. The present formalism is explicitly applied to the case G=SU(2)x U(1), as a Higgs-less alternative to the Standard Model of electroweak interactions, although it can also be used in low-energy phenomenological models for strong interactions.

V. Aldaya; M. Calixto; F. F. Lopez-Ruiz

2009-05-22T23:59:59.000Z

128

Quasilocal Thermodynamics of Dilaton Gravity coupled to Gauge Fields  

E-Print Network (OSTI)

We consider an Einstein-Hilbert-Dilaton action for gravity coupled to various types of Abelian and non-Abelian gauge fields in a spatially finite system. These include Yang-Mills fields and Abelian gauge fields with three and four-form field strengths. We obtain various quasilocal quantities associated with these fields, including their energy and angular momentum, and develop methods for calculating conserved charges when a solution possesses sufficient symmetry. For stationary black holes, we find an expression for the entropy from the micro-canonical form of the action. We also find a form of the first law of black hole thermodynamics for black holes with the gauge fields of the type considered here.

J. Creighton; R. B. Mann

1995-05-05T23:59:59.000Z

129

Remote high temperature insulatorless heat-flux gauge  

DOE Patents (OSTI)

A remote optical heat-flux gauge for use in high temperature environments. This application is possible because of the use of thermographic phosphors as the sensing media, and the omission of the need for an intervening layer of insulator between phosphor layers. The gauge has no electrical leads, but is interrogated with ultraviolet light. The luminescence emitted by the two thermographic-phosphor layers, which is indicative of the temperature of the layers, is collected and analyzed in order to determine the heat flux incident on the surface being investigated. The two layers of thermographic phosphor must be of different materials to assure that the spectral lines collected will be distinguishable. Spatial heat flux measurements can be made by scanning the light across the surface of the gauge.

Noel, B.W.

1992-12-31T23:59:59.000Z

130

Patterns of Spontaneous Chiral Symmetry Breaking in Vectorlike Gauge Theories  

E-Print Network (OSTI)

It has been conjectured that spontaneous chiral symmetry breaking in strongly coupled vectorlike gauge theories falls into only three different classes, depending on the gauge group and the representations carried by the fermions. We test this proposal by studying SU(2), SU(3) and SU(4) lattice gauge theories with staggered fermions in different irreducible representations. Staggered fermions away from the continuum limit should, for all complex representations, still belong to the continuum class of spontaneous symmetry breaking. But for all real and pseudo-real representations we show that staggered fermions should belong to incorrect symmetry breaking classes away from the continuum, thus generalizing previous results. As an unambiguous signal for whether chiral symmetry breaks, and which breaking pattern it follows, we look at the smallest Dirac eigenvalue distributions. We find that the patterns of symmetry breaking are precisely those conjectured.

P. H. Damgaard; U. M. Heller; R. Niclasen; B. Svetitsky

2008-01-01T23:59:59.000Z

131

N=2 supersymmetric gauge theories and quantum integrable systems  

E-Print Network (OSTI)

We study N=2 supersymmetric gauge theories on the product of a two-sphere and a cylinder. We show that the low-energy dynamics of a BPS sector of such a theory is described by a quantum integrable system, with the Planck constant set by the inverse of the radius of the sphere. If the sphere is replaced with a hemisphere, then our system reduces to an integrable system of the type studied by Nekrasov and Shatashvili. In this case we establish a correspondence between the effective prepotential of the gauge theory and the Yang-Yang function of the integrable system.

Yuan Luo; Meng-Chwan Tan; Junya Yagi

2013-10-02T23:59:59.000Z

132

N=2 supersymmetric gauge theories and quantum integrable systems  

E-Print Network (OSTI)

We study N=2 supersymmetric gauge theories on the product of a two-sphere and a cylinder. We show that the low-energy dynamics of a BPS sector of such a theory is described by a quantum integrable system, with the Planck constant set by the inverse of the radius of the sphere. If the sphere is replaced with a hemisphere, then our system reduces to an integrable system of the type studied by Nekrasov and Shatashvili. In this case we establish a correspondence between the effective prepotential of the gauge theory and the Yang-Yang function of the integrable system.

Luo, Yuan; Yagi, Junya

2013-01-01T23:59:59.000Z

133

Unification of gravity, gauge fields, and Higgs bosons  

E-Print Network (OSTI)

We consider a diffeomorphism invariant theory of a gauge field valued in a Lie algebra that breaks spontaneously to the direct sum of the spacetime Lorentz algebra, a Yang-Mills algebra, and their complement. Beginning with a fully gauge invariant action -- an extension of the Plebanski action for general relativity -- we recover the action for gravity, Yang-Mills, and Higgs fields. The low-energy coupling constants, obtained after symmetry breaking, are all functions of the single parameter present in the initial action and the vacuum expectation value of the Higgs.

A. Garrett Lisi; Lee Smolin; Simone Speziale

2010-04-27T23:59:59.000Z

134

A dark matter model with non-Abelian gauge symmetry.  

SciTech Connect

We propose a dark-matter model in which the dark sector is gauged under a new SU(2) group. The dark sector consists of SU(2) dark gauge fields, two triplet dark Higgs fields, and two dark fermion doublets (dark-matter candidates in this model). The dark sector interacts with the standard model sector through kinetic and mass mixing operators. The model explains both PAMELA and Fermi LAT data very well and also satisfies constraints from both the dark-matter relic density and standard model precision observables. The phenomenology of the model at the LHC is also explored.

Zhang, H.; Li, C. S.; Cao, Q.-H.; Li, Z.; High Energy Physics; Univ. of Chicago; Peking Univ.; Michigan State Univ.

2010-10-07T23:59:59.000Z

135

Gauge theories on hyperbolic spaces and dual wormhole instabilities  

Science Conference Proceedings (OSTI)

We study supergravity duals of strongly coupled four-dimensional gauge theories formulated on compact quotients of hyperbolic spaces. The resulting background geometries are represented by Euclidean wormholes, which complicate establishing the precise gauge theory/string theory correspondence dictionary. These backgrounds suffer from the nonperturbative instabilities arising from the D3D3-bar pair-production in the background four-form potential. We discuss conditions for suppressing this Schwingerlike instability. We find that Euclidean wormholes arising in this construction develop a naked singularity before they can be stabilized.

Buchel, Alex [Department of Applied Mathematics, University of Western Ontario, London, Ontario N6A 5B7 (Canada); Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2J 2W9 (Canada)

2004-09-15T23:59:59.000Z

136

Yang-Mills Gauge Conditions from Witten's Open String Field Theory  

E-Print Network (OSTI)

We construct the Zinn-Justin-Batalin-Vilkovisky action for tachyons and gauge bosons from Witten's 3-string vertex of the bosonic open string without gauge fixing. Through canonical transformations, we find the off-shell, local, gauge-covariant action up to 3-point terms, satisfying the usual field theory gauge transformations. Perturbatively, it can be extended to higher-point terms. It also gives a new gauge condition in field theory which corresponds to the Feynman-Siegel gauge on the world-sheet.

Haidong Feng; Warren Siegel

2006-11-28T23:59:59.000Z

137

Duality transformation of non-Abelian tensor gauge fields  

E-Print Network (OSTI)

For non-Abelian tensor gauge fields we have found an alternative form of duality transformation, which has the property that the direct and the inverse transformations coincide. This duality transformation has the desired property that the direct and the inverse transformations map Lagrangian forms into each other.

Sebastian Guttenberg; George Savvidy

2008-01-16T23:59:59.000Z

138

A Rain Gauge for the Measurement of Finescale Temporal Variations  

Science Conference Proceedings (OSTI)

A rain gauge is described that quantizes rainwater collected by a funnel into equal-sized drops. Using a funnel of 150-mm diameter, the quantization corresponds to 1/160 mm of rainfall, enabling the measurement of low rainfall rates and the ...

C. David Stow; Stuart G. Bradley; Keith E. Farrington; Kim N. Dirks; Warren R. Gray

1998-02-01T23:59:59.000Z

139

A comparison of collider searches for new gauge bosons  

SciTech Connect

We compare and contrast the search capabilities during the next decade of e{sup +}e{sup {minus}}, ep, and {bar p}p colliders for new neutral gauge bosons in several extended versions of the Standard Model. 7 refs., 3 figs., 1 tab.

Hewett, J.L. (Wisconsin Univ., Madison, WI (USA). Dept. of Physics); Rizzo, T.G. (Wisconsin Univ., Madison, WI (USA). Dept. of Physics Iowa State Univ. of Science and Technology, Ames, IA (USA))

1990-01-01T23:59:59.000Z

140

Rain Gauge and Disdrometer Measurements during the Keys Area Microphysics Project (KAMP)  

Science Conference Proceedings (OSTI)

Four impact disdrometers and 27 tipping bucket rain gauges were operated at 11 different sites during August and September 2001, as part of the Keys Area Microphysics Project. The rain gauge and disdrometer network was designed to study the range ...

Ali Tokay; David B. Wolff; Katherine R. Wolff; Paul Bashor

2003-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

An Investigation of the Consistency of TAO–TRITON Buoy-Mounted Capacitance Rain Gauges  

Science Conference Proceedings (OSTI)

The common use of remotely located, buoy-mounted capacitance rain gauges in the tropical oceans for satellite rainfall verification studies provides motivation for an in situ gauge bias assessment. A comparison of the biases in rainfall catchment ...

Mark L. Morrissey; Howard J. Diamond; Michael J. McPhaden; H. Paul Freitag; J. Scott Greene

2012-06-01T23:59:59.000Z

142

Real-Time Correction of Spatially Nonuniform Bias in Radar Rainfall Data Using Rain Gauge Measurements  

Science Conference Proceedings (OSTI)

A procedure for real-time correction of spatially nonuniform bias in radar rainfall data using rain gauge measurements is described. Developed to complement the existing gauge-based bias correction procedures used in the National Weather Service (...

Dong-Jun Seo; J. P. Breidenbach

2002-04-01T23:59:59.000Z

143

Intercomparison of Rain Gauge, Radar, and Satellite-Based Precipitation Estimates with Emphasis on Hydrologic Forecasting  

Science Conference Proceedings (OSTI)

This study compares mean areal precipitation (MAP) estimates derived from three sources: an operational rain gauge network (MAPG), a radar/gauge multisensor product (MAPX), and the Precipitation Estimation from Remotely Sensed Information using ...

Koray K. Yilmaz; Terri S. Hogue; Kuo-lin Hsu; Soroosh Sorooshian; Hoshin V. Gupta; Thorsten Wagener

2005-08-01T23:59:59.000Z

144

The Van de Casteele Test Revisited: An Efficient Approach to Tide Gauge Error Characterization  

Science Conference Proceedings (OSTI)

The classical question of metrology related to the quality of the tide gauge measurements has become more important this last decade or so as new technologies have emerged and tide gauge networks are modernized. The Global Sea Level Observing ...

Belen Martin Miguez; Laurent Testut; Guy Wöppelmann

2008-07-01T23:59:59.000Z

145

Estimation of Wind-Induced Error of Rainfall Gauge Measurements Using a Numerical Simulation  

Science Conference Proceedings (OSTI)

A new method of estimating the wind-induced error of rainfall gauge measurements is presented. The method is based on a three-dimensional numerical simulation of the airflow around a precipitation gauge and subsequent computation of particle ...

Vladislav Nešpor; Boris Sevruk

1999-04-01T23:59:59.000Z

146

The Yang-Mills theory as a massless limit of a massive nonabelian gauge model  

E-Print Network (OSTI)

A gauge invariant infrared regularization of the Yang-Mills theory applicable beyond perturbation theory is constructed.

A. A. Slavnov

2012-12-13T23:59:59.000Z

147

All-order Finiteness of the Higgs Boson Mass in the Dynamical Gauge-Higgs Unification  

E-Print Network (OSTI)

In the dynamical gauge-Higgs unification, it is shown that the mass of the Higgs boson (4D scalar field) in U(1) gauge theory in $M^4 \\times T^n$ ($n=1,2,3,...$) is finite to all order in perturbation theory as a consequence of the large gauge invariance. It is conjectured that the Higgs boson mass is finite in non-Abelian gauge theory in $M^4 \\times S^1$, $M^4 \\times (S^1/Z_2)$ and the Randall-Sundrum warped spacetime to all order in the rearranged perturbation theory where the large gauge invariance is maintained.

Yutaka Hosotani

2006-07-06T23:59:59.000Z

148

Gauging Improvements in Urban Building Energy Policy in India  

NLE Websites -- All DOE Office Websites (Extended Search)

Gauging Improvements in Urban Gauging Improvements in Urban Building Energy Policy in India Christopher Williams and Mark Levine China Energy Group Environmental Energy Technologies Division Lawrence Berkeley National Laboratory Preprint version of paper for conference proceedings, ACEEE Summer Study on Energy Efficiency in Buildings, Pacific Grove, California, August 12-17, 2012. June 2012 This work was supported by the U.S. Department of Energy under Contract No. DE- AC02-05CH11231. ERNEST ORLANDO LAWRENCE BERKELEY NATIONAL LABORATORY LBNL-5577E Disclaimer This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any

149

N >= 4 Supergravity Amplitudes from Gauge Theory at Two Loops  

SciTech Connect

We present the full two-loop four-graviton amplitudes in N = 4, 5, 6 supergravity. These results were obtained using the double-copy structure of gravity, which follows from the recently conjectured color-kinematics duality in gauge theory. The two-loop four-gluon scattering amplitudes in N = 0, 1, 2 supersymmetric gauge theory are a second essential ingredient. The gravity amplitudes have the expected infrared behavior: the two-loop divergences are given in terms of the squares of the corresponding one-loop amplitudes. The finite remainders are presented in a compact form. The finite remainder for N = 8 supergravity is also presented, in a form that utilizes a pure function with a very simple symbol.

Boucher-Veronneau, C.; Dixon, L.J.; /SLAC

2012-02-15T23:59:59.000Z

150

Superconducting Circuits for Quantum Simulation of Dynamical Gauge Fields  

E-Print Network (OSTI)

We describe a superconducting-circuit lattice design for the implementation and simulation of dynamical lattice gauge theories. We illustrate our proposal by analyzing a one-dimensional U(1) quantum-link model, where superconducting qubits play the role of matter fields on the lattice sites and the gauge fields are represented by two coupled microwave resonators on each link between neighboring sites. A detailed analysis of a minimal experimental protocol for probing the physics related to string breaking effects shows that despite the presence of decoherence in these systems, distinctive phenomena from condensed-matter and high-energy physics can be visualized with state-of-the-art technology in small superconducting-circuit arrays.

D. Marcos; P. Rabl; E. Rico; P. Zoller

2013-06-07T23:59:59.000Z

151

Over-populated gauge fields on the lattice  

E-Print Network (OSTI)

We study nonequilibrium dynamics of SU(2) pure gauge theory starting from initial over-population, where intense classical gauge fields are characterized by a single momentum scale Q_s. Classical-statistical lattice simulations indicate a quick evolution towards an approximate scaling behavior with exponent 3/2 at intermediate times. Remarkably, the value for the scaling exponent may be understood as arising from the leading O(g^2) contribution in the presence of a time-dependent background field. The phenomenon is associated to weak wave turbulence describing an energy cascade towards higher momenta. This particular aspect is very similar to what is observed for scalar theories, where an effective cubic interaction arises because of the presence of a time-dependent Bose condensate.

J. Berges; S. Schlichting; D. Sexty

2012-03-21T23:59:59.000Z

152

Systematic gauge-invariant approach to heavy quarkonium decays  

Science Conference Proceedings (OSTI)

We present a method which, starting directly from QCD, permits a systematic gauge-invariant expansion to be made for all hard processes involving quarkonia in powers of the quark relative velocity, a small natural parameter for heavy quark systems. Our treatment automatically introduces soft gluons in the expansion. Corrections arising from the incorporation of gauge symmetry turn out to be important for decay and fragmentation processes involving {ital Q{bar Q}} systems. The contribution of soft gluons is shown to be of higher order in {ital v} and so is neglected for calculations done up to and including {ital O}({ital v}{sup 2}). {copyright} {ital 1996 The American Physical Society.}

Khan, H. [Department of Physics, Quaid-e-Azam University, Islamabad (Pakistan)] [Department of Physics, Quaid-e-Azam University, Islamabad (Pakistan); Hoodbhoy, P. [Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)] [Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); [Department of Physics, Quaid-e-Azam University, Islamabad (Pakistan)

1996-03-01T23:59:59.000Z

153

Phases of N=1 Supersymmetric Chiral Gauge Theories  

SciTech Connect

We analyze the phases of supersymmetric chiral gauge theories with an antisymmetric tensor and (anti)fundamental flavors, in the presence of a classically marginal superpotential deformation. Varying the number of flavors that appear in the superpotential reveals rich infrared chiral dynamics and novel dualities. The dualities are characterized by an infinite family of magnetic duals with arbitrarily large gauge groups describing the same fixed point, correlated with arbitrarily large classical global symmetries that are truncated nonperturbatively. At the origin of moduli space, these theories exhibit a phase with confinement and chiral symmetry breaking, an interacting nonabelian Coulomb phase, and phases where an interacting sector coexists with a sector that either s-confines or is in a free magnetic phase. Properties of these intriguing 'mixed phases' are studied in detail using duality and a-maximization, and the presence of superpotential interactions provides further insights into their formation.

Craig, Nathaniel; /Princeton, Inst. Advanced Study /Rutgers U., Piscataway; Essig, Rouven; /Princeton, Inst. Advanced Study /YITP, Stony Brook /SLAC /Stanford U., Phys. Dept.; Hook, Anson; Torroba, Gonzalo; /SLAC /Stanford U., Phys. Dept.

2012-02-17T23:59:59.000Z

154

Thermodynamics of SU(3) gauge theory at fixed lattice spacing  

E-Print Network (OSTI)

We study thermodynamics of SU(3) gauge theory at fixed scales on the lattice, where we vary temperature by changing the temporal lattice size N_t=(Ta_t)^{-1}. In the fixed scale approach, finite temperature simulations are performed on common lattice spacings and spatial volumes. Consequently, we can isolate thermal effects in observables from other uncertainties, such as lattice artifact, renormalization factor, and spatial volume effect. Furthermore, in the EOS calculations, the fixed scale approach is able to reduce computational costs for zero temperature subtraction and parameter search to find lines of constant physics, which are demanding in full QCD simulations. As a test of the approach, we study the thermodynamics of the SU(3) gauge theory on isotropic and anisotropic lattices. In addition to the equation of state, we calculate the critical temperature and the static quark free energy at a fixed scale.

T. Umeda; S. Ejiri; S. Aoki; T. Hatsuda; K. Kanaya; Y. Maezawa; H. Ohno

2008-10-09T23:59:59.000Z

155

Continuum Thermodynamics of the SU(N) Gauge Theory  

E-Print Network (OSTI)

The thermodynamics of the deconfined phase of the SU(N) gauge theory is studied. Careful study is made of the approach to the continuum limit. The latent heat of the deconfinement transition is studied, for the theories with 3, 4 and 6 colors. Continuum estimates of various thermodynamic quantities are studied, and the approach to conformality investigated. The bulk thermodynamic quantities at different N are compared, to investigate the validity of 't Hooft scaling at these values of N.

Saumen Datta; Sourendu Gupta

2010-12-30T23:59:59.000Z

156

Just Renormalizable TGFT's on $U(1)^{d}$ with Gauge Invariance  

E-Print Network (OSTI)

We study the polynomial Abelian or $U(1)^d$ Tensorial Group Field Theories equipped with a gauge invariance condition in any dimension $d$. From our analysis, we prove the just renormalizability at all orders of perturbation of the $\\vp^4_6$ and $\\vp^6_5$ random tensor models. We also deduce that the $\\vp^4_5$ tensor model is super-renormalizable.

Samary, Dine Ousmane

2012-01-01T23:59:59.000Z

157

CFT fusion rules, DHR gauge groups, and CAR algebras  

E-Print Network (OSTI)

It is demonstrated that several series of conformal field theories, while satisfying braid group statistics, can still be described in the conventional setting of the DHR theory, i.e. their superselection structure can be understood in terms of a compact DHR gauge group. Besides theories with only simple sectors, these include (the untwisted part of) c=1 orbifold theories and level two so(N) WZW theories. We also analyze the relation between these models and theories of complex free fermions.

J. B"ockenhauer; J. Fuchs

1997-05-07T23:59:59.000Z

158

Lattice gaugefixing and other optics in lattice gauge theory  

Science Conference Proceedings (OSTI)

We present results from four projects. In the first, quark and gluon propagators and effective masses and {Delta}I = 1/2 Rule operator matching coefficients are computed numerically in gaugefixed lattice QCD. In the second, the same quantities are evaluated analytically in the strong coupling, N {yields} {infinity} limit. In the third project, the Schwinger model is studied in covariant gauges, where we show that the effective electron mass varies with the gauge parameter and that longitudinal gaugefixing ambiguities affect operator product expansion coefficients (analogous to {Delta}I = 1/2 Rule matching coefficients) determined by matching gauge variant matrix elements. However, we find that matching coefficients even if shifted by the unphysical modes are {xi} invariant. In the fourth project, we show that the strong coupling parallelogram lattice Schwinger model as a different thermodynamic limit than the weak coupling continuum limit. As a function of lattice skewness angle these models span the {Delta} = {minus}1 critical line of 6-vertex models which, in turn, have been identified as c = 1 conformal field theories.

Yee, Ken.

1992-06-01T23:59:59.000Z

159

Restriction Condition of Gauge Transformation that Motion Equation of non-Abelian Gauge Field Must satisfy and Elimination of Higgs Mechanism  

E-Print Network (OSTI)

In the current theory of non-Abelian gauge field, we only claim the invariability of Lagrangian, without claim the invariability of the motion equation. This is inconsistent and irrational. It is proved that a restriction relation between gauge potentials and group parameters must be satisfied in order to ensure the gauge invariability of the motion equation of non-Abelian gauge field, and the restriction relation is equivalent to the Faddeev--Popov theory. The result leads to that the completely local gauge invariability is violated but there still exists the incompletely local gauge invariability. After the restriction relation is considered, the mass item of the non-Abelian gauge fields can be added into the Lagrangian and motion equation directly without violating gauge invariability. The corresponding W,T identity is obtained and the theory is still renormalizable. In this way, the Higgs mechanism becomes unnecessary. It means that we can reach a coincident theory without the hypothesis of the Higgs particles again. The description of the stander theory of particle physics can also be simplified greatly and the problem of CP violation in strong interaction can also be solved thoroughly.

Mei Xiaochun

2000-04-13T23:59:59.000Z

160

New Results in Topological Field Theory and Abelian Gauge Theory  

E-Print Network (OSTI)

These are the lecture notes of a set of lectures delivered at the 1995 Trieste summer school in June. I review some recent work on duality in four dimensional Maxwell theory on arbitrary four manifolds, as well as a new set of topological invariants known as the Seiberg-Witten invariants. Much of the necessary background material is given, including a crash course in topological field theory, cohomology of manifolds, topological gauge theory and the rudiments of four manifold theory. My main hope is to wet the readers appetite, so that he or she will wish to read the original works and perhaps to enter this field.

George Thompson

1995-11-06T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Exact Solutions of the Abelian Decomposed Restricted Gauge Potential  

Science Conference Proceedings (OSTI)

We construct new exact solution of the SU(2) Yang-Mills-Higgs model by considering Abelian decomposition of the gauge potential. The solution is obtained by considering only the restricted part of the decomposition, where the unrestricted valence part is switched off. The solutions possess free parameters c{sub 1}, c{sub 2} and q that correspond to different physical system of monopoles. Under the limit of c{sub 1} = 0, c{sub 2} = 1, and q = 1, the solution is that of the Wu-Yang-like monopole.

Wong, Khai-Ming; Teh, Rosy; Koh, Pin-Wai [School of Physics, Universiti Sains Malaysia, 11800 USM, Penang (Malaysia)

2011-03-30T23:59:59.000Z

162

Heavy quarks, gluons and the confinement potential in Coulomb gauge  

SciTech Connect

We consider the heavy quark limit of Coulomb gauge QCD, with the truncation of the Yang-Mills sector to include only (dressed) two-point functions. We find that the rainbow-ladder approximation to the gap and Bethe-Salpeter equations is nonperturbatively exact and moreover, we provide a direct connection between the temporal gluon propagator and the quark confinement potential. Further, we show that only bound states of color singlet quark-antiquark (meson) and quark-quark (SU(2) baryon) pairs are physically allowed.

Popovici, Carina; Watson, Peter; Reinhardt, Hugo [Institut fuer Theoretische Physik, Universitaet Tuebingen, Auf der Morgenstelle 14, D-72076 Tuebingen (Germany)

2011-05-23T23:59:59.000Z

163

Integral equation for gauge invariant quark Green's function  

E-Print Network (OSTI)

We consider gauge invariant quark two-point Green's functions in which the gluonic phase factor follows a skew-polygonal line. Using a particular representation for the quark propagator in the presence of an external gluon field, functional relations between Green's functions with different numbers of segments of the polygonal lines are established. An integral equation is obtained for the Green's function having a phase factor along a single straight line. The related kernels involve Wilson loops with skew-polygonal contours and with functional derivatives along the sides of the contours.

H. Sazdjian

2008-06-20T23:59:59.000Z

164

PDF uncertainties at large x and gauge boson production  

SciTech Connect

I discuss how global QCD fits of parton distribution functions can make the somewhat separated fields of high-energy particle physics and lower energy hadronic and nuclear physics interact to the benefit of both. In particular, I will argue that large rapidity gauge boson production at the Tevatron and the LHC has the highest short-term potential to constrain the theoretical nuclear corrections to DIS data on deuteron targets necessary for up/down flavor separation. This in turn can considerably reduce the PDF uncertainty on cross section calculations of heavy mass particles such as W' and Z' bosons.

Accardi, Alberto [Hampton U., JLAB

2012-10-01T23:59:59.000Z

165

Spin Hall effects for cold atoms in a light induced gauge potential  

SciTech Connect

We propose an experimental scheme to observe spin Hall effects with cold atoms in a light induced gauge potential. Under an appropriate configuration, the cold atoms moving in a spatially varying laser field experience an effective spin-dependent gauge potential. Through numerical simulation, we demonstrate that such a gauge field leads to observable spin Hall currents under realistic conditions. We also discuss the quantum spin Hall state in an optical lattice.

Zhu, Shi-Liang; /Michigan U., MCTP /South China Normal U.; Fu, Hao; /Michigan U., MCTP; Wu, C.-J.; /Santa Barbara, KITP; Zhang, S.-C.; /Stanford U., Phys. Dept.; Duan, L.-M. /Michigan U., MCTP

2010-03-16T23:59:59.000Z

166

On the covariant gauge {alpha} of the linearized gravity in de Sitter spacetime  

SciTech Connect

In previous work, we studied the linearized gravity with covariant gauge {beta}= 2/3 and {alpha}= 5/3. It was found that the sum of the source and initial contributions reproduces the correct field configuration over the whole de Sitter spacetime. In this paper, we extend this work to generalizing the linearized gravitational field in an arbitrary value of the gauge parameter {alpha} but the gauge parameter {beta} remains the same.

Cheong, Lee Yen [Department of Fundamental and Applied Science Universiti Teknologi Petronas, Bandar Seri Iskandar, 31750 Tronoh, Perak (Malaysia)

2012-09-26T23:59:59.000Z

167

Lectures on the gauge/string duality with emphasis on spectroscopy  

Science Conference Proceedings (OSTI)

I review recent progress on the connection between string theory and quantum chromo-dynamics in the context of the gauge/string duality. Emphasis is placed on conciseness and conceptual aspects rather than on technical details. Topics covered include the large-N{sub c} limit of gauge theories, the gravitational description of gauge theory thermodynamics and hydrodynamics, and the physics of quarks and mesons in the quark-gluon plasma.

Mateos, David [Institucio Catalana de Recerca i Estudis Avancats (ICREA), Barcelona (Spain) and Departament de Fisica Fonamental and Institut de Ciencies del Cosmos, Universitat de Barcelona, Diagonal 647, E-08028 Barcelona (Spain)

2010-11-12T23:59:59.000Z

168

Gauge invariant metric fluctuations in the early universe from STM theory of gravity: nonperturbative formalism  

E-Print Network (OSTI)

We develop a nonperturbative quantum field formalism to describe scalar gauge-invariant metric flucturations in the early universe from a 5D apparent (Ricci flat) vacuum.

Mariano Anabitarte; Mauricio Bellini

2007-05-23T23:59:59.000Z

169

Numerical test of the Gribov-Zwanziger scenario in Landau gauge  

E-Print Network (OSTI)

We review the status of lattice simulations of gluon and ghost propagators in Landau gauge, testing predictions of the Gribov-Zwanziger confinement scenario.

Attilio Cucchieri; Tereza Mendes

2010-01-14T23:59:59.000Z

170

Supersymmetric U(N) Gauge Model and Partial Breaking of N=2 Supersymmetry  

E-Print Network (OSTI)

We review the construction of the N=2 U(N) gauge model and the analysis of vacua of the model. On the vacua, N=2 supersymmetry is spontaneously broken to N=1, and the gauge symmetry is broken to a product gauge group \\prod_{i=1}^n U(N_i). The masses of the supermultiplets appearing on the N=1 vacua are given. We provide a manifestly N=2 supersymmetric formulation of the U(N) gauge model coupled with N=2 hypermultiplets, and show that N=2 supersymmetry is partially broken down to N=1 spontaneously.

Kazuhito Fujiwara; Hiroshi Itoyama; Makoto Sakaguchi

2006-02-25T23:59:59.000Z

171

A gauged baby Skyrme model and a novel BPS bound  

E-Print Network (OSTI)

The baby Skyrme model is a well-known nonlinear field theory supporting topological solitons in two space dimensions. Its action functional consists of a potential term, a kinetic term quadratic in derivatives (the "nonlinear sigma model term") and the Skyrme term quartic in first derivatives. The limiting case of vanishing sigma model term (the so-called BPS baby Skyrme model) is known to support exact soliton solutions saturating a BPS bound which exists for this model. Further, the BPS model has infinitely many symmetries and conservation laws. Recently it was found that the gauged version of the BPS baby Skyrme model with gauge group U(1) and the usual Maxwell term, too, has a BPS bound and BPS solutions saturating this bound. This BPS bound is determined by a superpotential which has to obey a superpotential equation, in close analogy to the situation in supergravity. Further, the BPS bound and the corresponding BPS solitons only may exist for potentials such that the superpotential equation has a global...

Adam, C; Sanchez-Guillen, J; Wereszczynski, A

2012-01-01T23:59:59.000Z

172

Gauge/String-Gravity Duality and Froissart Bound  

E-Print Network (OSTI)

The gauge/string-gravity duality correspondence opened renewed hope and possibility to address some of the fundamental and non-perturbative QCD problems in particle physics, such as hadron spectrum and Regge behavior of the scattering amplitude at high energies. One of the most fundamental and long-standing problem is the high energy behavior of total cross-sections. According to a series of exhaustive tests by the COMPETE group, (1). total cross-sections have a universal Heisenberg behavior in energy corresponding to the maximal energy behavior allowed by the Froissart bound, i.e., $A + B ln^2 (s/s_0)$ with $B \\sim 0.32 mb$ and $s_0 \\sim 34.41 GeV^2$ for all reactions, and (2). the factorization relation among $\\sigma_{pp, even}, \\sigma_{\\gamma p}, and \\sigma_{\\gamma \\gamma}$ is well satisfied by experiments. I discuss the recent interesting application of the gauge/string-gravity duality of $AdS/CFT$ correspondence with a deformed background metric so as to break the conformal symmetry that can lead to the Heisenberg behavior of rising total cross-sections, and present some preliminary results on the high energy QCD from Planckian scattering in $AdS$ and black-hole production.

Kyungsik Kang

2004-10-16T23:59:59.000Z

173

Hadron potentials within the gauge/string correspondence  

Science Conference Proceedings (OSTI)

It is known, since the 70s, that the large N 't Hooft limit of gauge theories is related to string theories. In 1998, J. M. Maldacena identified precisely such a relation: the so-called AdS/CFT correspondence which speculates a duality between a large N strongly-coupled supersymmetric and conformal Yang-Mills theory in four dimensions and a weakly-coupled string theory defined in a five-dimensional anti-de Sitter AdS{sub 5} space-time. This review aims at introducing concepts and methods used to derive, in the framework of the gauge/string correspondence, the interaction potentials of mesons and baryons at zero and finite temperature. The dual string configurations associated with the different kinds of hadrons are described and their behaviours at short and large distances are understood. Although the application of Maldacena's AdS/CFT conjecture to QCD is not straightforward, QCD being neither supersymmetric nor conformal, the AdS/QCD correspondence approach attempts to identify the dual theory of QCD. Especially, the study of heavy quark-antiquark bound-states leads to establish general dual criteria for the confinement.

Jugeau, Frederic, E-mail: jugeau@ihep.ac.c [Institute of High Energy Physics, Chinese Academy of Sciences, P. O. Box 918(4), Beijing 100049 (China); Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049 (China)

2010-08-15T23:59:59.000Z

174

Temporal downscaling of daily gauged precipitation by application of a satellite product for flood simulation in a poorly gauged basin and its evaluation with multiple regression analysis  

Science Conference Proceedings (OSTI)

The present research demonstrated that temporal downscaling of rain gauge precipitation with satellite-based precipitation enhances the accuracy of hydrological simulations, especially in the flood duration. Multiple regression analysis was ...

Masahiro RYO; Oliver C. Saavedra V.Shinjiro Kanae; Tinh Dang Ngoc

175

Hidden symmetries induced by a canonical transformation and gauge structure of compactified Yang-Mills theories  

E-Print Network (OSTI)

Compactified Yang-Mills theories with one universal extra dimension were found [arXiv:1008.4638] to exhibit two types of gauge invariances: the standard gauge transformations (SGTs) and the nonstandard gauge transformations (NSGTs). In the present work we show that these transformations are not exclusive to compactified scenarios. Introducing a notion of hidden symmetry, based on the fundamental concept of canonical transformation, we analyse three different gauge systems, each of which is mapped to a certain effective theory that is invariant under the so-called SGTs and NSGTs. The systems under discussion are: (i) four dimensional pure $SU(3)$ Yang-Mills theory, (ii) four dimensional $SU(3)$ Yang-Mills with spontaneous symmetry breaking, and (iii) pure Yang-Mills theory with one universal compact extra dimension. The canonical transformation, that induces the notion of hidden symmetry, maps objects with well defined transformation laws under a gauge group $G$ to well defined objects under a non-trivial subgroup $H \\subset G$. In the case where spontaneous symmetry breaking is present, the set of SGTs corresponds to the group into which the original gauge group is broken into, whereas the NSGTs are associated to the broken generators and can be used to define the unitary gauge. For the system (iii), the SGTs coincide with the gauge group $ SU(N,\\cal{M}^{4}) $, whereas the NSGTs do not form a group; in this system the 'fundamental' theory and the effective one are shown to be classically equivalent.

M. A. López-Osorio; E. Martínez-Pascual; H. Novales-Sánchez; J. J. Toscano

2013-02-13T23:59:59.000Z

176

125 GeV Higgs Boson From Gauge-Higgs Unification: A Snowmass white paper  

E-Print Network (OSTI)

In certain five dimensional gauge theories compactified on the orbifold $S^1/Z_2$ the Standard Model Higgs doublet is identified with the zero mode of the fifth component of the gauge field. This gauge-Higgs unification scenario is realized at high energies, and the Standard Model as an effective theory below the compactification scale satisfies the boundary condition that the Higgs quartic coupling vanishes at the compactification scale (gauge-Higgs condition). This is because at energies above the compactification scale, the five dimensional gauge invariance is restored and the Higgs potential vanishes as a consequence. We consider scenario where top quark Yukawa and weak gauge coupling unification can be realized and identify the compactification scale as one at which this two coupling couplings have the same value. Taking into account the experimental uncertainties in measurements of the top quark mass and the QCD coupling constant, the Higgs mass prediction of 119-126 GeV from the gauge-Higgs unification scenario is consistent with the experimentally measured value of 125-126 GeV. More precise measurements of the top quark mass and the QCD coupling constant are crucial to reduce the interval of the Higgs mass prediction and thereby test the feasibility of the gauge-Higgs unification scenario.

Ilia Gogoladze; Nobuchika Okada; Qaisar Shafi

2013-07-18T23:59:59.000Z

177

A Gauge-Based Analysis of Daily Precipitation over East Asia  

Science Conference Proceedings (OSTI)

A new gauge-based analysis of daily precipitation has been constructed on a 0.5° latitude–longitude grid over East Asia (5°–60°N, 65°–155°E) for a 26-yr period from 1978 to 2003 using gauge observations at over 2200 stations collected from ...

Pingping Xie; Mingyue Chen; Song Yang; Akiyo Yatagai; Tadahiro Hayasaka; Yoshihiro Fukushima; Changming Liu

2007-06-01T23:59:59.000Z

178

Improving tide-gauge data processing: A method involving tidal frequencies and inverted barometer effect  

Science Conference Proceedings (OSTI)

Sea level measured at tide-gauge stations is affected by undesired events such as spikes, gaps, steps and time shifts. The presence of these instrumental failures seriously decreases the quality of each analysis done using the record. Furthermore, they ... Keywords: Data processing, Inverted barometer effect, Ocean tides, Sea-level changes, Tide-gauge observations

E. Gil; C. de Toro

2005-10-01T23:59:59.000Z

179

Physical interpretation of gauge invariant perturbations of spherically symmetric space-times  

E-Print Network (OSTI)

By calculating the Newman-Penrose Weyl tensor components of a perturbed spherically symmetric space-time with respect to invariantly defined classes of null tetrads, we give a physical interpretation, in terms of gravitational radiation, of odd parity gauge invariant metric perturbations. We point out how these gauge invariants may be used in setting boundary and/or initial conditions in perturbation theory.

Brien C. Nolan

2004-06-11T23:59:59.000Z

180

I REMARKS ON THE TOPOLOGY OF GAUGE FIELDS*  

NLE Websites -- All DOE Office Websites (Extended Search)

! 8 ' SLAC-PUB-2089 March 1978 (T) I REMARKS ON THE TOPOLOGY OF GAUGE FIELDS* t Y. Nambu Stanford Linear Accelerator Center Stanford University, Stanford, California 94305 In contrast to the short distance behavior of quantum chromodynamics (QCD), which is within the scope of perturbation theory and thus can be subjected to quantitative t e s t s , the large distance or strong coupling regime of QCD is not well understood yet even qualitatively. An overriding problem of interest in quark confinement, and various theoretical schemes have been put forward to show that the quarks can indeed be confined. These schemes, though , varying from one to another i n detail, rely on the idea that the growing coupling constant at large distances plays a key role. It is not clear yet, however,

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Deeply virtual Compton scattering from gauge/gravity duality  

Science Conference Proceedings (OSTI)

We use gauge/gravity duality to study deeply virtual Compton scattering (DVCS) in the limit of high center of mass energy at fixed momentum transfer, corresponding to the limit of low Bjorken x, where the process is dominated by the exchange of the pomeron. At strong coupling, the pomeron is described as the graviton Regge trajectory in AdS space, with a hard wall to mimic confinement effects. This model agrees with HERA data in a large kinematical range. The behavior of the DVCS cross section for very high energies, inside saturation, can be explained by a simple AdS black disk model. In a restricted kinematical window, this model agrees with HERA data as well.

Costa, Miguel S.; Djuric, Marko [University of Porto (Portugal)

2013-04-15T23:59:59.000Z

182

Unstable particles, gauge invariance and the Delta^{++} resonance parameters  

E-Print Network (OSTI)

The elastic and radiative pion(+)-proton scattering are studied in the framework of an effective Lagrangian model for the Delta^{++} resonance and its interactions. The finite width effects of this spin-3/2 resonance are introduced in the scattering amplitudes through a complex mass scheme to respect electromagnetic gauge invariance. The resonant pole (Delta^{++}) and background contributions (rho^0, sigma, Delta and neutron states) are separated according to the principles of the analytic S-matrix theory. The mass and width parameters of the \\Delta^{++} obtained from a fit to experimental data on the total cross section are in agreement with the results of a model-independent analysis based on the analytic S-matrix approach. The magnetic dipole moment determined from the radiative pion-proton scattering is mu_Delta^{++}=(6.14 +/- 0.51) nuclear magnetons.

G. Lopez Castro; A. Mariano

2003-02-24T23:59:59.000Z

183

A TRANSISTORIZED ALPHA COUNTER FOR AN ALPHA GAUGE  

SciTech Connect

A transistorized instrument prototype was designed and constructed to replace a vacuum-tube instrument in an alpha gauge, which measures the thickness density of gases. The instrument amplifies, shapes, discriminates, and counts alpha pulses from a Au-Si surface-barrier detector exposed to an alpha source in a gas-filled chamber. The circuit consists of a charge-sensitive preamplifier, a main amplifier with pulse clipping, a Schmitt trigger, a diode pump, and a count rate meter. Preliminary tests gave results comparable to the vacuum-tube instrument. Accuracy of counting was within 10% for 0.5- to 10-Mev alpha particles emitted at a maximum rate of 10/sup 6 per sec. The instrument was stable at 25 to 55 deg C, is small and portable, and costs less than 0. An infinitely thick, alpha source that will give a high count rate is being constructed for final tests. (auth)

Kopp, M.C.

1962-08-23T23:59:59.000Z

184

A nanocrystal strain gauge for luminescence detection of mechanical forces  

Science Conference Proceedings (OSTI)

Local microscale stresses play a crucial role in inhomogeneous mechanical processes from cell motility to material failure. However, it remains difficult to spatially resolve stress at these small length scales. While contact-probe and non-contact based techniques have been used to quantify local mechanical behavior in specific systems with high stiffness or stress and spatial resolution, these methods cannot be used to study a majority of micromechanical systems due to spectroscopic and geometrical constraints. We present here the design and implementation of a luminescent nanocrystal strain gauge, the CdSe/CdS core/shell tetrapod. The tetrapod can be incorporated into many materials, yielding a local stress measurement through optical fluorescence spectroscopy of the electronically confined CdSe core states. The stress response of the tetrapod is calibrated and utilized to study mechanical behavior in single polymer fibers. We expect that tetrapods can be used to investigate local stresses in many other mechanical systems.

Choi, Charina; Koski, Kristie; Olson, Andrew; Alivisatos, Paul

2010-07-26T23:59:59.000Z

185

Topics in Noncommutative Gauge Theories and Deformed Relativistic Theories  

E-Print Network (OSTI)

This is my PhD thesis. In this thesis we study the gauge theories on noncommutative Moyal space. We find new static solitons and instantons in terms of the so called generalized Bose operators. Generalized Bose operators are constructed to describe reducible representation of the oscillator algebra. They create/annihilate $k$-quanta, $k$ being a positive integer. We start with giving an alternative description to the already found static magnetic flux tube solutions of the noncommutative gauge theories in terms of generalized Bose operators. The Nielsen-Olesen vortex solutions found in terms of these operators reduce to the already found ones. On the contrary we find a class of new instaton solutions which are unitarily inequivalant to the the ones found from ADHM construction on noncommutative space. The charge of the instaton has a description in terms of the index representing the reducibility of the Fock space, i.e., $k$. After studying the static solitonic solutions in noncommutative Minkowski space and the instaton solutions in noncommutative Euclidean space we go on to study the implications of the time-space noncommutativity in Minkowski space. To understand it properly we study the time-dependent transitions of a forced harmonic oscillator in noncommutative 1+1 dimensional spacetime. We also try to understand the implications of the found results in the context of quantum optics. We then shift to the so called DSR theories which are related to a different kind of noncommutative ($\\kappa$-Minkowski) space. DSR (Doubly/Deformed Special Relativity) aims to search for an alternate relativistic theory which keeps a length/energy scale (the Planck scale) and a velocity scale (the speed of light scale) invariant. We study thermodynamics of an ideal gas in such a scenario.

Nitin Chandra

2013-01-17T23:59:59.000Z

186

Climatology-Calibrated Precipitation Analysis at Fine Scales: Statistical Adjustment of Stage IV towards CPC Gauge Based Analysis  

Science Conference Proceedings (OSTI)

Two widely used precipitation analyses are the CPC Unified Global Daily Gauge Analysis and Stage IV analysis based on quantitative precipitation estimate with multi-sensor observations. The Former is based on gauge records with a uniform quality ...

Dingchen Hou; Mike Charles; Yan Luo; Zoltan Toth; Yuejian Zhu; Roman Krzysztofowicz; Ying Lin; Pingping Xie; Dong-Jun Seo; Malaquias Pena; Bo Cui

187

A Manifestly Gauge Invariant, Continuum Calculation of the SU(N) Yang-Mills two-loop beta function  

E-Print Network (OSTI)

The manifestly gauge invariant Exact Renormalisation Group provides a framework for performing continuum computations in SU(N) Yang-Mills theory, without fixing the gauge. We use this formalism to compute the two-loop beta function in a manifestly gauge invariant way, and without specifying the details of the regularisation scheme.

Tim R. Morris; Oliver J. Rosten

2005-08-04T23:59:59.000Z

188

Three-Dimensional N \\geq 5 Superconformal Chern-Simons Gauge Theories And Their Relations  

E-Print Network (OSTI)

We propose three-dimensional N=6 superconformal U(N) X U(M) and SU(N) X SU(N) Chern-Simons gauge theories with two pairs of bifundamental chiral superfields in the (N, M) and (\\overline{N}, \\overline{M}) representations and in the (N, N) and (\\overline{N}, \\overline{N}) representations, respectively. We also propose the superconformal U(1) X U(1) gauge theories that have n pairs of bifundamental chiral superfields with U(1) X U(1) charges (\\pm 1, \\mp 1) or (\\pm 1, \\pm 1). Although these U(1) X U(1) gauge theories have global symmetry SU(2n), the R-symmetry is SO(6) for n=2, and might be SO(2n) or SO(2n+1) for 3 \\leq n \\leq 8. In addition, we show that from either the generalized ABJM theories, or our U(N) X U(M) theories, or the N=5 superconformal O(N) X USp(2M) gauge theories, we can derive all the N \\geq 5 superconformal Chern-Simons gauge theories except the N=5 superconformal G_2 X USp(2) gauge theory and our U(1) X U(1) gauge theories with n \

Tianjun Li

2008-10-13T23:59:59.000Z

189

Gauge-Higgs Unification: Stable Higgs Bosons as Cold Dark Matter  

E-Print Network (OSTI)

In the gauge-Higgs unification the 4D Higgs field becomes a part of the extra-dimensional component of the gauge potentials. In the $SO(5) \\times U(1)$ gauge-Higgs unification in the Randall-Sundrum warped spacetime the electroweak symmetry is dynamically broken through the Hosotani mechanism. The Higgs bosons become absolutely stable, and become the dark matter of the universe. The mass of the Higgs boson is determined from the WMAP data to be about 70 GeV.

Yutaka Hosotani

2010-03-16T23:59:59.000Z

190

Light-cone gauge Hamiltonian for AdS_4 x CP^3 superstring  

E-Print Network (OSTI)

It is developed the phase-space formulation for the Type IIA superstring on the AdS_4 x CP^3 background in the kappa-symmetry light-cone gauge for which the light-like directions are taken from the D=3 Minkowski boundary of AdS_4. After fixing bosonic light-cone gauge the superstring Hamiltonian is expressed as a function of the transverse physical variables and in the quadratic approximation corresponds to the light-cone gauge-fixed IIA superstring in flat space.

D. V. Uvarov

2009-12-07T23:59:59.000Z

191

The ice-limit of Coulomb gauge Yang-Mills theory  

E-Print Network (OSTI)

In this paper we describe gauge invariant multi-quark states generalising the path integral framework developed by Parrinello, Jona-Lasinio and Zwanziger to amend the Faddeev-Popov approach. This allows us to produce states such that, in a limit which we call the ice-limit, fermions are dressed with glue exclusively from the fundamental modular region associated with Coulomb gauge. The limit can be taken analytically without difficulties, avoiding the Gribov problem. This is llustrated by an unambiguous construction of gauge invariant mesonic states for which we simulate the static quark--antiquark potential.

Thomas Heinzl; Anton Ilderton; Kurt Langfeld; Martin Lavelle; David McMullan

2008-07-29T23:59:59.000Z

192

The cost of gauge coupling unification in the SU(5) model at three loops  

E-Print Network (OSTI)

The non-supersymmetric SU(5) model can accommodate heavy neutrinos and gauge coupling unification when augmented with an adjoint fermionic multiplet 24_F. Among the most important phenomenological implications of the model is the prediction of light fermions and scalars, charged under the SU(2) gauge group, in the reach of the Large Hadron Collider (LHC). In this talk, we report on the recent calculation of the correlation function between the mass scale of the new electroweak multiplets and the gauge coupling unification scale at three loop accuracy.

L. Mihaila

2013-05-14T23:59:59.000Z

193

Gravity-induced birefringence within the framework of Poincare gauge theory  

E-Print Network (OSTI)

Gauge theories of gravity provide an elegant and promising extension of general relativity. In this paper we show that the Poincar\\'e gauge theory exhibits gravity-induced birefringence under the assumption of a specific gauge invariant nonminimal coupling between torsion and Maxwell's field. Furthermore we give for the first time an explicit expression for the induced phaseshift between two orthogonal polarization modes within the Poincar\\'e framework. Since such a phaseshift can lead to a depolarization of light emitted from an extended source this effect is, in principle, observable. We use white dwarf polarimetric data to constrain the essential coupling constant responsible for this effect.

Oliver Preuss; Sami K. Solanki; M. P. Haugan; Stefan Jordan

2005-07-16T23:59:59.000Z

194

Evidence for layered symmetry breaking in SU(2) lattice gauge theory  

E-Print Network (OSTI)

Simulations of four-dimensional SU(2) lattice gauge theory are performed with partial axial gauge fixing trees spanning three of the four dimensions. The remaining SU(2) gauge symmetry, global in three directions and local in one, is found to break spontaneously at weak coupling, with the average fourth-dimension-pointing link in each perpendicular hyperplane as order parameter. The symmetry is restored at strong coupling. Symmetry breaking in each hyperplane appears to be independent, and occurs regardless of boundary conditions. The associated phase transition is likely coincident with the Polyakov loop transition.

Michael Grady

2004-09-29T23:59:59.000Z

195

QCD in terms of gauge-invariant dynamical variables  

E-Print Network (OSTI)

For a complete description of the physical properties of low-energy QCD, it might be advantageous to first reformulate QCD in terms of gauge-invariant dynamical variables, before applying any approximation schemes. Using a canonical transformation of the dynamical variables, which Abelianises the non-Abelian Gauss-law constraints to be implemented, such a reformulation can be achieved for QCD. The exact implementation of the Gauss laws reduces the colored spin-1 gluons and spin-1/2 quarks to unconstrained colorless spin-0, spin-1, spin-2 and spin-3 glueball fields and colorless Rarita-Schwinger fields respectively. The obtained physical Hamiltonian can then be rewritten into a form, which separates the rotational from the scalar degrees of freedom, and admits a systematic strong-coupling expansion in powers of lambda=g^{-2/3}, equivalent to an expansion in the number of spatial derivatives. The leading-order term in this expansion corresponds to non-interacting hybrid-glueballs, whose low-lying masses can be ...

Pavel, Hans-Peter

2013-01-01T23:59:59.000Z

196

Space-Time Diffeomorphisms in Noncommutative Gauge Theories  

E-Print Network (OSTI)

In previous work [Rosenbaum M. et al., J. Phys. A: Math. Theor. 40 (2007), 10367-10382, hep-th/0611160] we have shown how for canonical parametrized field theories, where space-time is placed on the same footing as the other fields in the theory, the representation of space-time diffeomorphisms provides a very convenient scheme for analyzing the induced twisted deformation of these diffeomorphisms, as a result of the space-time noncommutativity. However, for gauge field theories (and of course also for canonical geometrodynamics) where the Poisson brackets of the constraints explicitely depend on the embedding variables, this Poisson algebra cannot be connected directly with a representation of the complete Lie algebra of space-time diffeomorphisms, because not all the field variables turn out to have a dynamical character [Isham C.J., Kuchar K.V., Ann. Physics 164 (1985), 288-315, 316-333]. Nonetheless, such an homomorphic mapping can be recuperated by first modifying the original action and then adding addi...

Rosenbaum, Marcos; Juarez, L Roman

2008-01-01T23:59:59.000Z

197

Thermodynamics of SU(3) Gauge Theory in 2 + 1 Dimensions  

E-Print Network (OSTI)

The pressure, and the energy and entropy densities are determined for the SU(3) gauge theory in $2 + 1$ dimensions from lattice Monte Carlo calculations in the interval $0.6 \\leq T/T_c \\leq 15$. The finite temperature lattices simulated have temporal extent $N_\\tau = 2, 4, 6$ and 8, and spatial volumes $N_S^2$ such that the aspect ratio is $N_S/N_\\tau = 8$. To obtain the thermodynamical quantities, we calculate the averages of the temporal plaquettes $P_\\tau$ and the spatial plaquettes $P_S$ on these lattices. We also need the zero temperature averages of the plaquettes $P_0$, calculated on symmetric lattices with $N_\\tau = N_S$. We discuss in detail the finite size ($N_S$-dependent) effects. These disappear exponentially. For the zero temperature lattices we find that the coefficient of $N_S$ in the exponent is of the order of the glueball mass. On the finite temperature lattices it lies between the two lowest screening masses. For the aspect ratio equal to eight, the systematic errors coming from the finite size effects are much smaller than our statistical errors. We argue that in the continuum limit, at high enough temperature, the pressure can be parametrized by the very simple formula $p=a-bT_c/T$ where $a$ and $b$ are two constants. Using the thermodynamical identities for a large homogeneous system, this parametrization then determines the other thermodynamical variables in the same temperature range.

P. Bialas; L. Daniel; A. Morel; B. Petersson

2008-07-07T23:59:59.000Z

198

Experimental 4D-Var Assimilation of SYNOP Rain Gauge Data at ECMWF  

Science Conference Proceedings (OSTI)

Four-dimensional variational data assimilation (4D-Var) experiments with 6-hourly rain gauge accumulations observed at synoptic stations (SYNOP) around the globe have been run over several months, both at high resolution in an ECMWF operations-...

Philippe Lopez

2013-05-01T23:59:59.000Z

199

Accuracy of NWS 8" Standard Nonrecording Precipitation Gauge: Results and Application of WMO Intercomparison  

Science Conference Proceedings (OSTI)

The standard 8" nonrecording precipitation gauge has been used historically by the National Weather Service (NWS) as the official precipitation measurement instrument of the U.S. climate station network. From 1986 to 1992, the accuracy and ...

Daqing Yang; Barry E. Goodison; John R. Metcalfe; Valentin S. Golubev; Roy Bates; Timothy Pangburn; Clayton L. Hanson

1998-02-01T23:59:59.000Z

200

Effects of Retrospective Gauge-Based Readjustment of Multisensor Precipitation Estimates on Hydrologic Simulations  

Science Conference Proceedings (OSTI)

This paper presents methodologies for mitigating temporally inconsistent biases in National Weather Service (NWS) real-time multisensor quantitative precipitation estimates (MQPEs) through rain gauge–based readjustments, and examines their effects ...

Yu Zhang; Seann Reed; David Kitzmiller

2011-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Electric/magnetic duality for chiral gauge theories with anomaly cancellation  

E-Print Network (OSTI)

We show that 4D gauge theories with Green-Schwarz anomaly cancellation and possible generalized Chern-Simons terms admit a formulation that is manifestly covariant with respect to electric/magnetic duality transformations. This generalizes previous work on the symplectically covariant formulation of anomaly-free gauge theories as they typically occur in extended supergravity, and now also includes general theories with (pseudo-)anomalous gauge interactions as they may occur in global or local N=1 supersymmetry. This generalization is achieved by relaxing the linear constraint on the embedding tensor so as to allow for a symmetric 3-tensor related to electric and/or magnetic quantum anomalies in these theories. Apart from electric and magnetic gauge fields, the resulting Lagrangians also feature two-form fields and can accommodate various unusual duality frames as they often appear, e.g., in string compactifications with background fluxes.

Jan De Rydt; Torsten T. Schmidt; Mario Trigiante; Antoine Van Proeyen; Marco Zagermann

2008-08-15T23:59:59.000Z

202

Simulating Typhoon Floods with Gauge Data and Mesoscale-Modeled Rainfall in a Mountainous Watershed  

Science Conference Proceedings (OSTI)

A physically based distributed hydrological model was applied to simulate typhoon floods over a mountainous watershed in Taiwan. The meteorological forcings include the observed gauge rainfall data and the predicted rainfall data from a mesoscale ...

Ming-Hsu Li; Ming-Jen Yang; Ruitang Soong; Hsiao-Ling Huang

2005-06-01T23:59:59.000Z

203

Intercomparison of Rainfall Estimates from Radar, Satellite, Gauge, and Combinations for a Season of Record Rainfall  

Science Conference Proceedings (OSTI)

Rainfall products from radar, satellite, rain gauges, and combinations have been evaluated for a season of record rainfall in a heavily instrumented study domain in Oklahoma. Algorithm performance is evaluated in terms of spatial scale, temporal ...

Jonathan J. Gourley; Yang Hong; Zachary L. Flamig; Li Li; Jiahu Wang

2010-03-01T23:59:59.000Z

204

A Study of Delays in Making Tide Gauge Data Available to Tsunami Warning Centers  

Science Conference Proceedings (OSTI)

This short note provides conclusions of a study of the various factors that determine the delay between tsunami arrival at a tide gauge station and data being made available at tsunami warning centers. The various delays involved include those ...

S. J. Holgate; P. L. Woodworth; P. R. Foden; J. Pugh

2008-03-01T23:59:59.000Z

205

Analyses of Global Monthly Precipitation Using Gauge Observations, Satellite Estimates, and Numerical Model Predictions  

Science Conference Proceedings (OSTI)

An algorithm is developed to construct global gridded fields of monthly precipitation by merging estimates from five sources of information with different characteristics, including gauge-based monthly analyses from the Global Precipitation ...

Pingping Xie; Phillip A. Arkin

1996-04-01T23:59:59.000Z

206

Synthetic Subsurface Pressure Derived from Bottom Pressure and Tide Gauge Observations  

Science Conference Proceedings (OSTI)

Synthetic subsurface pressure (SSP) can be formed from tide gauge records and from bottom pressure measurements to provide a consistent and convenient basis for comparison of these two different types of observations. Common methods for this ...

Sabine Harms; Clinton D. Winant

1994-12-01T23:59:59.000Z

207

Inflaton field fluctuations from gauge-invariant metric fluctuations during inflation  

E-Print Network (OSTI)

The evolution of the inflaton field fluctuations from gauge-invariant metric fluctuations is discused. In particular, the case of a symmetric $\\phi_c$-exponential potential is analyzed.

Mariano Anabitarte; Mauricio Bellini

2004-06-28T23:59:59.000Z

208

Improving Estimates of Heavy and Extreme Precipitation Using Daily Records from European Rain Gauges  

Science Conference Proceedings (OSTI)

The long-term variability in heavy precipitation characteristics over Europe for the period 1950–2000 is analyzed using high-quality daily records of rain gauge measurements from the European Climate Assessment (ECA) dataset. To improve the ...

Olga Zolina; Clemens Simmer; Konstantin Belyaev; Alice Kapala; Sergey Gulev

2009-06-01T23:59:59.000Z

209

Stability of an oscillon un the SU (2) gauged Higgs model  

E-Print Network (OSTI)

Oscillons are localized solutions of nonlinear field theories that oscillate without dissipation. We have numerically found a family of very long-lived oscillons the spherical ansatz of the SU(2) gauged Higgs model -the ...

Markov, Ruza

2005-01-01T23:59:59.000Z

210

Discrepancy between Gauges and Satellite Estimates of Rainfall in Equatorial Africa  

Science Conference Proceedings (OSTI)

The Global Precipitation Climatology Project (GPCP) satellite estimates have approximately twice the magnitude of estimates produced from the rain gauges used by the GPCP in central equatorial Africa. Different possible explanations are ...

Jeffrey R. McCollum; Arnold Gruber; Mamoudou B. Ba

2000-05-01T23:59:59.000Z

211

Hydrologic Evaluation of Rainfall Estimates from Radar, Satellite, Gauge, and Combinations on Ft. Cobb Basin, Oklahoma  

Science Conference Proceedings (OSTI)

This study evaluates rainfall estimates from the Next Generation Weather Radar (NEXRAD), operational rain gauges, Tropical Rainfall Measuring Mission (TRMM) Multisatellite Precipitation Analysis (TMPA), and Precipitation Estimation from Remotely ...

Jonathan J. Gourley; Yang Hong; Zachary L. Flamig; Jiahu Wang; Humberto Vergara; Emmanouil N. Anagnostou

2011-10-01T23:59:59.000Z

212

A low-energy solution to the mu-problem in gauge mediation  

E-Print Network (OSTI)

In the gauge-mediation framework the soft supersymmetry breaking mass parameters of the supersymmetric standard model are induced by the gauge interactions of some messenger fields. The parameters exhibit flavor universality which is dictated by the gauge interactions and which efficiently eliminates new dangerous contributions to flavor changing neutral currents. However, the Higgs potential in this framework typically contains an unacceptable hierarchy between its dimensionful parameters (the $\\mu$-problem of gauge mediation). We show that the problem can be resolved if the Higgs potential arises dynamically once an intermediate U(1)' sector is integrated out rather than arising radiatively from some Yukawa interactions at the messenger scale. As an added benefit, such models may naturally avoid new contribution to CP violating amplitudes. The proposed framework is described, explicit examples are given and its phenomenology is explored. The $\\mu$ problem is resolved in this case by the low-energy U(1)' dynamics which could be tested in future collider experiments.

Paul Langacker; Nir Polonsky; Jing Wang

1999-05-05T23:59:59.000Z

213

Hawking radiation via anomaly cancellation for the black holes of five-dimensional minimal gauged supergravity  

E-Print Network (OSTI)

The anomaly cancellation method proposed by Wilczek et al. is applied to the general charged rotating black holes in five-dimensional minimal gauged supergravity. Thus Hawking temperature and fluxes are found. The Hawking ...

Porfyriadis, Achilleas P.

214

Statistical Evaluation of Combined Daily Gauge Observations and Rainfall Satellite Estimates over Continental South America  

Science Conference Proceedings (OSTI)

This paper describes a comprehensive assessment of a new high-resolution, gauge–satellite-based analysis of daily precipitation over continental South America during 2004. This methodology is based on a combination of additive and multiplicative ...

Daniel A. Vila; Luis Gustavo G. de Goncalves; David L. Toll; Jose Roberto Rozante

2009-04-01T23:59:59.000Z

215

New Gauge Conditions in General Relativity: What Can We Learn from Them?  

E-Print Network (OSTI)

The construction of conformally invariant gauge conditions for Maxwell and Einstein theories on a manifold M is found to involve two basic ingredients. First, covariant derivatives of a linear gauge (e.g. Lorenz or de Donder), completely contracted with the tensor field representing the metric on the vector bundle of the theory. Second, the addition of a compensating term, obtained by covariant differentiation of a suitable tensor field built from the geometric data of the problem. If the manifold M is endowed with an m-dimensional positive-definite metric g, the existence theorem for such a gauge in gravitational theory can be proved. If the metric g is Lorentzian, which corresponds to general relativity, some technical steps are harder, but one has again to solve integral equations on curved space-time to be able to impose such gauges.

Giampiero Esposito; Cosimo Stornaiolo

1999-10-08T23:59:59.000Z

216

An Examination of Radar and Rain Gauge–Derived Mean Areal Precipitation over Georgia Watersheds  

Science Conference Proceedings (OSTI)

Compared to conventional rain gauge networks, the Weather Surveillance Radar-1988 Doppler provides precipitation estimates at enhanced spatial and temporal resolution that River Forecast Centers can use to improve streamflow forecasts. This study ...

Keith M. Stellman; Henry E. Fuelberg; Reggina Garza; Mary Mullusky

2001-02-01T23:59:59.000Z

217

Climatological Characterization of Three-Dimensional Storm Structure from Operational Radar and Rain Gauge Data  

Science Conference Proceedings (OSTI)

Three algorithms extract information on precipitation type, structure, and amount from operational radar and rain gauge data. Tests on one month of data from one site show that the algorithms perform accurately and provide products that ...

Matthias Steiner; Robert A. Houze Jr.; Sandra E. Yuter

1995-09-01T23:59:59.000Z

218

Effects of Rain Gauge Temporal Resolution on the Specification of a Z–R Relationship  

Science Conference Proceedings (OSTI)

The weather radar is an efficient alternative for measuring spatially varying rainfall covering a large area at a high temporal resolution. This paper studies the impact of rainfall gauge temporal resolution on optimal relationships between radar ...

Punpim Puttaraksa Mapiam; Nutchanart Sriwongsitanon; Siriluk Chumchean; Ashish Sharma

2009-07-01T23:59:59.000Z

219

Gauge-potential approach to the kinematics of a moving car  

E-Print Network (OSTI)

A kinematics of the motion of a car is reformulated in terms of the theory of gauge potentials (connection on principal bundle). E(2)-connection originates in the no-slipping contact of the car with a road.

Marian Fecko

1997-03-07T23:59:59.000Z

220

Data Transformation and Uncertainty in Geostatistical Combination of Radar and Rain Gauges  

Science Conference Proceedings (OSTI)

Geostatistics provides a popular framework for deriving high-resolution quantitative precipitation estimates (QPE) by combining radar and rain gauge data. However, the skewed and heteroscedastic nature of precipitation is in contradiction to ...

Rebekka Erdin; Christoph Frei; Hans R. Künsch

2012-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

The tricritical point of finite-temperature phase transitions in large N(Higgs) gauge theories  

E-Print Network (OSTI)

Gauge theories broken by a single Higgs field are known to have first-order phase transitions in temperature if $\\lambda/g^2 \\ll 1$, where $g$ is the gauge coupling and $\\lambda$ the Higgs self-coupling. If the theory is extended from one to $N$ Higgs doublets, with U($N$) flavor symmetry, the transition is known to be second order for $\\lambda/g^2 \\gtrsim 1$ in the $N\\to\\infty$ limit. We show that one can in principal compute the tricritical value of $\\lambda/g^2$, separating first from second-order transitions, to any order in $1/N$. In particular, scalar fluctuations at the transition damp away the usual problems with the infrared behavior of high-temperature non-Abelian gauge theories. We explicitly compute the tricritical value of $\\lambda/g^2$ for U(1) and SU(2) gauge theory to next-to-leading order in $1/N$.

Peter Arnold; David Wright

1996-10-02T23:59:59.000Z

222

The Application of Radar?Gauge Comparisons to Operational Precipitation Profile Corrections  

Science Conference Proceedings (OSTI)

The analyses of data recorded during the past eight years with two Swiss radars, a network of rain gauges, and river flow measurements have helped to quantify the vertical profile of reflectivity and the influences of topography, meteorology, and ...

Jürg Joss; Robert Lee

1995-12-01T23:59:59.000Z

223

Corrections to gauge theories in effective quantum gravity with a cutoff  

E-Print Network (OSTI)

We calculate the lowest order quantum gravity contributions to QED beta function in an effective field theory picture with a momentum cutoff. We use a recently proposed 4 dimensional improved momentum cutoff that preserves gauge and Lorentz symmetries. We find that there is non-vanishing quadratic contribution to the photon 2-point function but that does not lead to the running of the original coupling after renormalization. We argue that gravity cannot turn gauge theories asymptotically free.

G. Cynolter; E. Lendvai

2013-07-17T23:59:59.000Z

224

Probing Extra Matter in Gauge Mediation Through the Lightest Higgs Boson Mass  

E-Print Network (OSTI)

We discuss the implications of the excesses in LHC Higgs boson searches on the gauge mediated supersymmetric standard model, for the mass range 120-140\\,GeV. We find that a relatively heavy lightest Higgs boson mass in this range can be reconciled with light SUSY particles, $m_{\\rm gluino}Higgs boson. We also find that the mass of this extra matter can be predicted rather precisely in gauge mediation for a given Higgs boson and gluino mass.

Jason L. Evans; Masahiro Ibe; Tsutomu T. Yanagida

2011-08-17T23:59:59.000Z

225

Probing Extra Matter in Gauge Mediation Through the Lightest Higgs Boson Mass  

E-Print Network (OSTI)

We discuss the implications of the excesses in LHC Higgs boson searches on the gauge mediated supersymmetric standard model, for the mass range 120-140\\,GeV. We find that a relatively heavy lightest Higgs boson mass in this range can be reconciled with light SUSY particles, $m_{\\rm gluino}Higgs boson. We also find that the mass of this extra matter can be predicted rather precisely in gauge mediation for a given Higgs boson and gluino mass.

Evans, Jason L; Yanagida, Tsutomu T

2011-01-01T23:59:59.000Z

226

Grande Ronde Subbasin Gauging Station Operations, 2007-2008 Reporting Period.  

DOE Green Energy (OSTI)

The Grande Ronde Basin (GRB) in Northeast Oregon is a moderately dry climate receiving between 10 and 20 inches of precipitation per year with surrounding mountains accumulating up to 100 inches. Irrigated agriculture is a major part of the economy with water being diverted or pumped from surface and ground sources from April through October. Several ESA listed species exist in the basin including Chinook, steelhead, and bulltrout. Agriculture and ESA (Endangered Species Act) listed aquatic species combined with a dry climate demonstrate the need for a network of stream gauges. The GRB covers over 5,000 square miles and includes several thousand miles of perennial flowing streams. This project is in place to operate 12 existing stream gauges in combination with USGS (4 gauges) and OWRD (one gauge) who, independent of this project, operate five additional gauges (Grande Ronde at Troy, Imnaha R. at Imnaha, Minam R. at Minam, Lookingglass Creek, and Upper Catherine Cr.) to characterizes flow in both the Grande Ronde and Imnaha subbasins. These gauges are intended to assist in irrigation water management, fisheries management, long term flow and trend analysis, TMDL and SB1010 water quality management plan effectiveness, subbasin plan implementation, and provide essential information regarding cumulative effects response to conservation in the GRB. Headwater characteristics, land management influence, and basin outlet data are all selectively collected in this network of 17 flow gauges. Prior to the 2007 water year there were three separate stream gauging programs with similar objectives, protocol, and funding sources in the GRB. Each of these programs for the past ten years has operated under separate administration consuming more time and administrative money than is necessary to accomplish stated objectives. By combining all programs into one project costs have been reduced, each funding source has one contract instead of three, and the same amount of work has been done accomplishing the same objectives. This objective has been continued and realized in the 2008 water year.

Menton, R. Coby [Grande Ronde Model Watershed

2008-11-10T23:59:59.000Z

227

Conformal windows of Sp(2N) and SO(N) gauge theories  

Science Conference Proceedings (OSTI)

We study the nonperturbative dynamics of nonsupersymmetric asymptotically free gauge theories with fermionic matter in distinct representations of the SO(N) and Sp(2N) gauge groups. We use different analytic methods to unveil the associated conformal windows for the relevant matter representations. We propose a direct test for confronting and establishing the validity of the analytic methods used to constrain the conformal windows. By comparing the resulting windows for SU, Sp, and SO a pleasing universal picture emerges.

Sannino, Francesco [University of Southern Denmark, Campusvej 55, DK-5230 Odense M (Denmark)

2009-05-01T23:59:59.000Z

228

Unitary Matrix Model of a Chiral [SU(N)]^K Gauge Theory  

E-Print Network (OSTI)

We build a matrix model of a chiral [SU(N)]^K gauge theory (5D SQCD deconstructed down to 4D) using random unitary matrices to model chiral bifundamental fields (N,N-bar) (without (N-bar,N)). We verify the duality by matching the loop equation of the matrix model to the anomaly equations of the gauge theory. Then we evaluate the matrix model's free energy and use it to derive the effective superpotential for the gaugino condensates.

Edoardo Di Napoli; Vadim S. Kaplunovsky

2005-08-25T23:59:59.000Z

229

Changing the Hilbert space structure as a consequence of gauge transformations in "extended phase space" version of quantum geometrodynamics  

E-Print Network (OSTI)

In the earlier works on quantum geometrodynamics in extended phase space it has been argued that a wave function of the Universe should satisfy a Schrodinger equation. Its form, as well as a measure in Schrodinger scalar product, depends on a gauge condition (a chosen reference frame). It is known that the geometry of an appropriate Hilbert space is determined by introducing the scalar product, so the Hilbert space structure turns out to be in a large degree depending on a chosen gauge condition. In the present work we analyse this issue from the viewpoint of the path integral approach. We consider how the gauge condition changes as a result of gauge transformations. In this respect, three kinds of gauge transformations can be singled out: Firstly, there are residual gauge transformations, which do not change the gauge condition. The second kind is the transformations whose parameters can be related by homotopy. Then the change of gauge condition could be described by smoothly changing function. In particular, in this context time dependent gauges could be discussed. We also suggest that this kind of gauge transformations leads to a smooth changing of solutions to the Schrodinger equation. The third kind of the transformations includes those whose parameters belong to different homotopy classes. They are of the most interest from the viewpoint of changing the Hilbert space structure. In this case the gauge condition and the very form of the Schrodinger equation would change in discrete steps when we pass from a spacetime region with one gauge condition to another region with another gauge condition. In conclusion we discuss the relation between quantum gravity and fundamental problems of ordinary quantum mechanics.

T. P. Shestakova

2005-12-09T23:59:59.000Z

230

Interpreting Dirac variables in terms of the Hilbert space of gauge-invariant and Poincare-covariant states  

E-Print Network (OSTI)

The goal of this note is to give a description of Dirac variables in Abelian as well as non-Abelian gauge models in terms of gauge-invariant and Poincare-covariant states sweeping a Hilbert space ${\\cal H}_{\\rm vac}$. The next our conjecture concerns the spontaneous breakdown of the Abelian U(1) symmetry in the 'discrete' $U(1)\\to {\\bf Z}$ wise. We suppose that gauge charges are preserved in this case.

L. D Lantsman

2011-10-14T23:59:59.000Z

231

Gauge origin of M parity and the {mu} term in supersymmetry  

SciTech Connect

In this article, we present a simple theoretical framework where the origin of the {mu} term and the matter-parity-violating interactions of the minimal supersymmetric standard model can be understood from the spontaneous breaking of new Abelian gauge symmetries. In this context, the masses of the Z{sup '} gauge bosons, the M-parity-violating scale and the {mu} term are determined by the supersymmetry breaking scale. The full spectrum of the theory is discussed in detail. We investigate the predictions for the Higgs masses in detail showing that it is possible to satisfy the LEP2 bounds even with sub-TeV squark masses. The model predicts the existence of light colored fields, lepton- and baryon-number violation, and new neutral gauge bosons at the Large Hadron Collider.

Fileviez Perez, Pavel; Gonzalez-Alonso, Martin; Spinner, Sogee [Phenomenology Institute (PHENO), Department of Physics, University of Wisconsin-Madison, Wisconsin 53706 (United States); Center for Cosmology and Particle Physics (CCPP), Department of Physics, New York University, New York, 10003 (United States); Theoretical Nuclear, Particle, Astrophysics, and Cosmology (NPAC) Group, Department of Physics, University of Wisconsin-Madison, Wisconsin 53706 (United States); Phenomenology Institute (PHENO), Department of Physics, University of Wisconsin-Madison, Wisconsin 53706 (United States)

2011-11-01T23:59:59.000Z

232

Scaling properties of SU(2) gauge theory with mixed fundamental-adjoint action  

E-Print Network (OSTI)

We study the phase diagram of the SU(2) lattice gauge theory with fundamental-adjoint Wilson plaquette action. We confirm the presence of a first order bulk phase transition and we estimate the location of its end-point in the bare parameter space. If this point is second order, the theory is one of the simplest realizations of a lattice gauge theory admitting a continuum limit at finite bare couplings. All the relevant gauge observables are monitored in the vicinity of the fixed point with very good control over finite-size effects. The scaling properties of the low-lying glueball spectrum are studied while approaching the end-point in a controlled manner.

Enrico Rinaldi; Giuseppe Lacagnina; Biagio Lucini; Agostino Patella; Antonio Rago

2012-12-04T23:59:59.000Z

233

A 125GeV Higgs Boson and Muon g-2 in More Generic Gauge Mediation  

E-Print Network (OSTI)

Recently, the ATLAS and CMS collaborations reported exciting hints of a Standard Model-like Higgs boson with a mass around 125GeV. A Higgs boson this heavy is difficult to realize in conventional models of gauge mediation. Here we revisit the lightest Higgs boson mass in "more generic gauge mediation," where the Higgs doublets mix with the messenger doublets. We show that a Higgs boson mass around 125GeV can be realized in more generic gauge mediation models, even for a relatively light gluino mass ~1TeV. We also show that the muon anomalous magnetic moment can be within 1sigma of the experimental value for these models, even when the Higgs boson is relatively heavy. We also discuss the LHC constraints and the prospects of discovery.

Evans, Jason L; Shirai, Satoshi; Yanagida, Tsutomu T

2012-01-01T23:59:59.000Z

234

Topological gauge theories from supersymmetric quantum mechanics on spaces of connections  

E-Print Network (OSTI)

We rederive the recently introduced $N=2$ topological gauge theories, representing the Euler characteristic of moduli spaces ${\\cal M}$ of connections, from supersymmetric quantum mechanics on the infinite dimensional spaces ${\\cal A}/{\\cal G}$ of gauge orbits. To that end we discuss variants of ordinary supersymmetric quantum mechanics which have meaningful extensions to infinite-dimensional target spaces and introduce supersymmetric quantum mechanics actions modelling the Riemannian geometry of submersions and embeddings, relevant to the projections ${\\cal A}\\rightarrow {\\cal A}/{\\cal G}$ and inclusions ${\\cal M}\\subset{\\cal A}/{\\cal G}$ respectively. We explain the relation between Donaldson theory and the gauge theory of flat connections in $3d$ and illustrate the general construction by other $2d$ and $4d$ examples.

M Blau; G Thompson

1991-12-20T23:59:59.000Z

235

Method of determining the x-ray limit of an ion gauge  

DOE Patents (OSTI)

An ion gauge having a reduced "x-ray limit" and means for measuring that limit. The gauge comprises an ion gauge of the Bayard-Alpert type having a short collector and having means for varying the grid-collector voltage. The "x-ray limit" (i.e. the collector current resulting from x-rays striking the collector) may then be determined by the formula: ##EQU1## where: I.sub.x ="x-ray limit", I.sub.l and I.sub.h =the collector current at the lower and higher grid voltage respectively; and, .alpha.=the ratio of the collector current due to positive ions at the higher voltage to that at the lower voltage.

Edwards, Jr., David (Bellport, NY); Lanni, Christopher P. (Shirley, NY)

1981-01-01T23:59:59.000Z

236

Z2 electric strings and center vortices in SU(2) lattice gauge theory  

E-Print Network (OSTI)

We study the representations of SU(2) lattice gauge theory in terms of sums over the worldsheets of center vortices and Z2 electric strings, i.e. surfaces which open on the Wilson loop. It is shown that in contrast to center vortices the density of electric Z2 strings diverges in the continuum limit of the theory independently of the gauge fixing, however, their contribution to the Wilson loop yields physical string tension due to non-positivity of their statistical weight in the path integral, which is in turn related to the presence of Z2 topological monopoles in the theory.

M. I. Polikarpov; P. V. Buividovich

2008-01-01T23:59:59.000Z

237

Fiber-optic strain gauge with attached ends and unattached microbend section  

DOE Patents (OSTI)

A strain gauge is made of an optical fiber into which quasi-sinusoidal microbends have been permanently introduced. The permanent microbends cause a reduction in the fiber's optical transmission, but, when the gauge is attached to a substrate that is subsequently strained, the amplitude of the deformations will diminish and the optical transmission through the fiber will increase. An apparatus and process for manufacturing these microbends into the optical fiber through a heat-set process is employed; this apparatus and process includes a testing and calibration system.

Weiss, Jonathan D. (Albuquerque, NM)

1992-01-01T23:59:59.000Z

238

Diphoton Decay Excess and 125 GeV Higgs Boson in Gauge-Higgs Unification  

E-Print Network (OSTI)

In the context of gauge-Higgs unification scenario in a 5-dimensional flat spacetime, we investigate Higgs boson production via gluon fusion and its diphoton decay mode at the LHC. We show that the signal strength of the Higgs diphoton decay mode observed at ATLAS and CMS, which is considerably larger than the Standard Model expectation, can be explained by a simple gauge-Higgs unification model with color-singlet bulk fermions to which a half-periodic boundary condition is assigned. The bulk fermions also play a crucial role in reproducing the observed Higgs boson mass around 125 GeV.

Nobuhito Maru; Nobuchika Okada

2013-03-23T23:59:59.000Z

239

A confirmation of agreement of different approaches for scalar gauge-invariant metric perturbations during inflation  

E-Print Network (OSTI)

We revisit an extension of the well-known formalism for gauge-invariant scalar metric fluctuations, to study the spectrums for both, the inflaton and gauge invariant (scalar) metric fluctuations in the framework of a single field inflationary model where the quasi-exponential expansion is driven by an inflation which is minimally coupled to gravity. The proposal here examined is valid also for fluctuations with large amplitude, but for cosmological scales, where vector and tensor perturbations can be neglected and the fluid is irrotacional.

Mariano Anabitarte; Mauricio Bellini

2008-09-30T23:59:59.000Z

240

Fiber-optic strain gauge with attached ends and unattached microbend section  

DOE Patents (OSTI)

A strain gauge is made of an optical fiber into which quasi-sinusoidal microbends have been permanently introduced. The permanent microbends cause a reduction in the fiber's optical transmission, but, when the gauge is attached to a substrate that is subsequently strained, the amplitude of the deformations will diminish and the optical transmission through the fiber will increase. An apparatus and process for manufacturing these microbends into the optical fiber through a heat-set process is employed; this apparatus and process includes a testing and calibration system. 5 figs.

Weiss, J.D.

1992-07-21T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Generalized flux-tube solution in Abelian-projected SU(N) gauge theory  

E-Print Network (OSTI)

The [U(1)]^{N-1} dual Ginzburg-Landau (DGL) theory as a low-energy effective theory of Abelian-projected SU(N) gauge theory is formulated in a Weyl symmetric way. The string tensions of flux-tube solutions of the DGL theory associated with color-electric charges in various representations of SU(N) are calculated analytically at the border between type-I and type-II of the dual superconducting vacuum (Bogomol'nyi limit). The resulting string tensions satisfy the flux counting rule, which reflects the non-Abelian nature of gauge theory.

Yoshiaki Koma

2002-08-07T23:59:59.000Z

242

Electrically charged black branes in N=4^+, D=5 gauged supergravity  

E-Print Network (OSTI)

We analyze the properties of asymptotically AdS electrically charged black brane solutions in a consistent truncation of the N=4^+, D=5 Romans' gauged supergravity which contains gravity, SU(2) and U(1) gauge fields, and a dilaton possessing a nontrivial potential approaching a constant negative value at infinity. We find that the U(1)\\times U(1) solutions become unstable to forming non-Abelian hair. These configurations emerge as zero modes of the Abelian solutions at critical temperature and a critical (nonvanishing) ratio of the electric charges and can be viewed as holographic p-wave superfluids.

Yves Brihaye; Ruben Manvelyan; Eugen Radu; D. H. Tchrakian

2012-11-09T23:59:59.000Z

243

Gauge symmetric delta(1232) couplings and the radiative muon capture in hydrogen  

E-Print Network (OSTI)

Using the difference between the gauge symmetric and standard pi-N-delta couplings, a contact pi-pi-N-N term, quadratic in the pi-N-delta coupling, is explicitly constructed. Besides, a contribution from the delta excitation mechanism to the photon spectrum for the radiative muon capture in hydrogen is derived from the gauge symmetric pi-N-delta and gamma-N-delta couplings. It is shown for the photon spectrum, studied recently experimentally, that the new spectrum is for the photon momentums k > 60 MeV by 4-10 % smaller than the one obtained from standardly used couplings with the on-shell deltas.

J. Smejkal; E. Truhlik

2004-09-06T23:59:59.000Z

244

Central Charges in Non(anti)commutative N=2 Supersymmetric U(N) Gauge Theory  

E-Print Network (OSTI)

We study the central charge of the deformed N=(1,0) supersymmetry algebra in non(anti)commutative N=2 supersymmetric U(N) gauge theory. In the cases of N=1/2 superspace and N=2 harmonic superspace with the singlet deformation, we find that the central charge is deformed by the non(anti)commutative parameters but depends on the electric and magnetic charges. For generic deformation of N=2 harmonic superspace, we compute the O(C) correction to the central charges in the case of U(1) gauge group.

Katsushi Ito; Hiroaki Nakajima

2005-11-24T23:59:59.000Z

245

Comparison of Satellite Altimetry to Tide Gauge Measurement of Sea Level: Predictions of Glacio-Isostatic Adjustment  

Science Conference Proceedings (OSTI)

Modern rates of sea level change are of interest because of concerns that global warming may be causing glacier retreat. Both tide gauges and satellite radar altimetry are used to measure the present rates of change in sea level. Tide gauges ...

James A. Clark; Paul E. Haidle; L. Nichole Cunningham

2002-11-01T23:59:59.000Z

246

Gauge invariant method for maximum simplification of the field strength in non-Abelian Yang-Mills theories  

E-Print Network (OSTI)

A new local gauge invariant method is introduced in order to maximally simplify the expression for a SU(2) non-Abelian field strength. The new tetrads introduced in previous works are going to play a fundamental role in the algorithm presented in this manuscript. Three new local gauge invariant objects are going to guide us through the process of making a field strength block diagonal. The process is also covariant. Any non-trivial isospace field strength projection will become block diagonal through this algorithm. Along with the local gauge invariant method already developed in order to diagonalize the stress-energy tensor, we have with this new local gauge invariant method to maximally simplify the field strength, a new gauge invariant method to classify Yang-Mills field theories.

Alcides Garat

2013-06-10T23:59:59.000Z

247

Optical Measurements of Capillary-Gravity Wave Spectra Using a Scanning Laser Slope Gauge  

Science Conference Proceedings (OSTI)

A description of a new scanning laser slope gauge (SLSG) is given and the results obtained from both laboratory wind-wave tank and field measurements are presented. The device relies on the measurements of two components of surface slope to ...

Erik J. Bock; Tetsu Hara

1995-04-01T23:59:59.000Z

248

Early Discoveries of New Gauge Bosons W' and Z' in Leptonic Decay Channels at ATLAS  

E-Print Network (OSTI)

We present the potential of the ATLAS detector to discover new massive gauge bosons in their leptonic decay channels: W' -> l nu_l and Z' -> l+ l-. Emphasis is placed on early data-taking at the LHC with low luminosity (up to 1 fb^-1).

E. N. Thompson; for the ATLAS Collaboration

2008-10-16T23:59:59.000Z

249

Conservation laws for a gauge-variant umbra-Lagrangian in classical mechanics using bond graphs  

Science Conference Proceedings (OSTI)

In this article, conservation laws (invariants of motion) have been derived from symmetry operations for different energy domains. The formulation has been derived through an extended Noetherâ??s theorem and the bond graphs. An additional time-like ... Keywords: Noether's theorem, gauge transformation, radiation thermal system, time variant stiffness, umbra-Lagrangian

Vikas Rastogi; Amalendu Mukherjee

2011-04-01T23:59:59.000Z

250

A light-cone gauge for black-hole perturbation theory  

E-Print Network (OSTI)

The geometrical meaning of the Eddington-Finkelstein coordinates of Schwarzschild spacetime is well understood: (i) the advanced-time coordinate v is constant on incoming light cones that converge toward r=0, (ii) the angles theta and phi are constant on the null generators of each light cone, (iii) the radial coordinate r is an affine-parameter distance along each generator, and (iv) r is an areal radius, in the sense that 4 pi r^2 is the area of each two-surface (v,r) = constant. The light-cone gauge of black-hole perturbation theory, which is formulated in this paper, places conditions on a perturbation of the Schwarzschild metric that ensure that properties (i)--(iii) of the coordinates are preserved in the perturbed spacetime. Property (iv) is lost in general, but it is retained in exceptional situations that are identified in this paper. Unlike other popular choices of gauge, the light-cone gauge produces a perturbed metric that is expressed in a meaningful coordinate system; this is a considerable asset that greatly facilitates the task of extracting physical consequences. We illustrate the use of the light-cone gauge by calculating the metric of a black hole immersed in a uniform magnetic field. We construct a three-parameter family of solutions to the perturbative Einstein-Maxwell equations and argue that it is applicable to a broader range of physical situations than the exact, two-parameter Schwarzschild-Melvin family.

Brent Preston; Eric Poisson

2006-06-21T23:59:59.000Z

251

Snow Nowcasting Using a Real-Time Correlation of Radar Reflectivity with Snow Gauge Accumulation  

Science Conference Proceedings (OSTI)

This paper describes and evaluates an algorithm for nowcasting snow water equivalent (SWE) at a point on the surface based on a real-time correlation of equivalent radar reflectivity (Ze) with snow gauge rate (S). It is shown from both theory and ...

Roy Rasmussen; Michael Dixon; Steve Vasiloff; Frank Hage; Shelly Knight; J. Vivekanandan; Mei Xu

2003-01-01T23:59:59.000Z

252

Search for Gauge Mediated Supersymmetry in the gamma gamma missing ET Channel  

SciTech Connect

We present results on a search for Gauge Mediated Supersymmetry in the di-photon final state using Run II data collected by the D0 Experiment at the Fermilab Tevatron Collider. We discuss event selection, Standard Model backgrounds, and the lower limits on the lightest neutralino and chargino masses resulted from this analysis.

Kesisoglou, Stilianos Isaak; /Brown U.

2004-12-01T23:59:59.000Z

253

Fortran MPI Checkerboard Code for SU(3) Lattice Gauge Theory II  

E-Print Network (OSTI)

We study the performance of MPI checkerboard code for SU(3) lattice gauge theory as function of the number of MPI processes, which run in parallel on an identical number of CPU cores. Computing platforms explored are a small PC cluster at FSU and the Cray at NERSC.

Bernd A. Berg; Hao Wu

2009-04-07T23:59:59.000Z

254

Fortran MPI Checkerboard Code for SU(3) Lattice Gauge Theory II  

E-Print Network (OSTI)

We study the performance of MPI checkerboard code for SU(3) lattice gauge theory as function of the number of MPI processes, which run in parallel on an identical number of CPU cores. Computing platforms explored are a small PC cluster at FSU and the Cray at NERSC.

Berg, Bernd A

2009-01-01T23:59:59.000Z

255

Global Precipitation Estimates Based on a Technique for Combining Satellite-Based Estimates, Rain Gauge Analysis, and NWP Model Precipitation Information  

Science Conference Proceedings (OSTI)

The “satellite-gauge-model” (SGM) technique is described for combining precipitation estimates from microwave satellite data, infrared satellite data, rain gauge analyses, and numerical weather prediction models into improved estimates of global ...

George J. Huffman; Robert F. Adler; Bruno Rudolf; Udo Schneider; Peter R. Keehn

1995-05-01T23:59:59.000Z

256

A Comparison of NEXRAD WSR-88D Radar Estimates of Rain Accumulation with Gauge Measurements for High- and Low-Reflectivity Horizontal Gradient Precipitation Events  

Science Conference Proceedings (OSTI)

Radar-estimated rainfall amounts from the NEXRAD Weather Surveillance Radar precipitation accumulation algorithm were compared with measurements from numerous rain gauges (1639 radar versus gauge comparisons). Storm total rain accumulations from ...

Gerard E. Klazura; Jessica M. Thomale; D. Scott Kelly; Paul Jendrowski

1999-11-01T23:59:59.000Z

257

A lattice non-perturbative definition of an SO(10) chiral gauge theory and its induced standard model  

E-Print Network (OSTI)

The standard model is a chiral gauge theory where the gauge fields couple to the right-hand and the left-hand fermions differently. The standard model is defined perturbatively and describes all elementary particles (except gravitons) very well. However, for a long time, we do not know if we can have a non-perturbative definition of standard model as a Hamiltonian quantum mechanical theory. In this paper, we propose a way to give a modified standard model (with 48 two-component Weyl fermions) a non-perturbative definition by embedding the modified standard model into a SO(10) chiral gauge theory and then putting the SO(10) chiral gauge theory on a 3D spatial lattice with a continuous time. Such a non-perturbatively defined standard model is a Hamiltonian quantum theory with a finite-dimensional Hilbert space for a finite space volume. Using the defining connection between gauge anomalies and the symmetry-protected topological orders, we show that any chiral gauge theory can be non-perturbatively defined by putting it on a lattice in the same dimension, as long as the chiral gauge theory is free of all anomalies.

Xiao-Gang Wen

2013-05-05T23:59:59.000Z

258

LHC signals for coset electroweak gauge bosons in warped/composite pseudo-Goldstone boson Higgs models  

SciTech Connect

The framework of a warped extra dimension with the standard model (SM) fields propagating in it is a very well-motivated extension of the SM since it can address both the Planck-weak and flavor hierarchy problems of the SM. Within this framework, solution to the little hierarchy problem motivates extending the SM electroweak (EW) 5D gauge symmetry in such a way that its breakdown to the SM delivers the SM Higgs boson. We study signals at the large hadron collider (LHC) for the extra EW (called coset) gauge bosons, a fundamental ingredient of this framework. The coset gauge bosons, due to their unique EW gauge quantum numbers [doublets of SU(2){sub L}], do not couple at leading order to two SM particles. We find that, using the associated production of the charged coset gauge bosons via their coupling to bottom quark and a (light) Kaluza-Klein excitation of the top quark, the LHC can have a 3{sigma} reach of {approx}2(2.6) TeV for the coset gauge boson masses with {approx}100(1000) fb{sup -1} luminosity. Since current theoretical framework(s) suggest an indirect lower limit on coset gauge boson masses of > or approx. 3 TeV, luminosity or energy upgrade of LHC is likely to be crucial in observing these states.

Agashe, Kaustubh; Azatov, Aleksandr; Zhu Lijun [Maryland Center for Fundamental Physics, Department of Physics, University of Maryland, College Park, Maryland 20742 (United States); Han Tao; Li Yingchuan [Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States); Si Zongguo [Department of Physics, Shandong University, Jinan Shandong 250100 (China)

2010-05-01T23:59:59.000Z

259

The Heavy Quark Free Energy in QCD and in Gauge Theories with Gravity Duals  

E-Print Network (OSTI)

We show that the Polyakov loop approaches its asymptotic value at high temperatures {\\it from below} in any strongly-coupled gauge theory at large $N_c$ with a dual supergravity description. In these theories the Polyakov loop can be used to define a quantity that behaves as a free energy of a heavy quark in the medium. This should be compared to the recent lattice results in pure glue SU(3) theory at high temperatures where the Polyakov loop approaches its non-interacting limit {\\it from above}. We show that the "heavy quark free energy" obtained from the renormalized loop computed on the lattice does not behave as a true thermodynamic free energy. We conjecture that this should always be the case in asymptotically free gauge theories.

Jorge Noronha

2010-03-03T23:59:59.000Z

260

Gauge Field Generation on Large-Scale GPU-Enabled Systems  

E-Print Network (OSTI)

Over the past years GPUs have been successfully applied to the task of inverting the fermion matrix in lattice QCD calculations. Even strong scaling to capability-level supercomputers, corresponding to O(100) GPUs or more has been achieved. However strong scaling a whole gauge field generation algorithm to this regim requires significantly more functionality than just having the matrix inverter utilizing the GPUs and has not yet been accomplished. This contribution extends QDP-JIT, the migration of SciDAC QDP++ to GPU-enabled parallel systems, to help to strong scale the whole Hybrid Monte-Carlo to this regime. Initial results are shown for gauge field generation with Chroma simulating pure Wilson fermions on OLCF TitanDev.

Winter, Frank

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Gauge Field Generation on Large-Scale GPU-Enabled Systems  

E-Print Network (OSTI)

Over the past years GPUs have been successfully applied to the task of inverting the fermion matrix in lattice QCD calculations. Even strong scaling to capability-level supercomputers, corresponding to O(100) GPUs or more has been achieved. However strong scaling a whole gauge field generation algorithm to this regim requires significantly more functionality than just having the matrix inverter utilizing the GPUs and has not yet been accomplished. This contribution extends QDP-JIT, the migration of SciDAC QDP++ to GPU-enabled parallel systems, to help to strong scale the whole Hybrid Monte-Carlo to this regime. Initial results are shown for gauge field generation with Chroma simulating pure Wilson fermions on OLCF TitanDev.

Frank Winter

2012-12-04T23:59:59.000Z

262

Spin-Gauge Theory of Gravity with Higgs-field Mechanism  

E-Print Network (OSTI)

We propose a Lorentz-covariant Yang-Mills spin-gauge theory, where the function valued Dirac matrices play the role of a non-scalar Higgs-field. As symmetry group we choose $SU(2) \\times U(1)$. After symmetry breaking a non-scalar Lorentz-covariant Higgs-field gravity appears, which can be interpreted within a classical limit as Einstein's metrical theory of gravity, where we restrict ourselves in a first step to its linearized version.

H. Dehnen; E. Hitzer

2013-06-10T23:59:59.000Z

263

A finite temperature investigation of dual superconductivity in the modified SO(3) lattice gauge theory  

E-Print Network (OSTI)

We study the SO(3) lattice gauge theory in 3+1 dimensions with the adjoint Wilson action modified by a $\\mathbb{Z}_2$ monopole suppression term and by means of the Pisa disorder operator. We find evidence for a finite temperature deconfinement transition driven by the condensation of U(1) magnetic charges. A finite-size scaling test shows consistency with the critical exponents of the 3D Ising model.

A. Barresi; G. Burgio; M. D'Elia; M. Mueller-Preussker

2004-05-05T23:59:59.000Z

264

Analytic and numerical study of the free energy in gauge theory  

E-Print Network (OSTI)

We derive some exact bounds on the free energy W(J) in an SU(N) gauge theory, where J_mu^b is a source for the gluon field A_mu^b in the minimal Landau gauge, and W(J) is the generating functional of connected correlators, exp W(J) = . We also provide asymptotic expressions for the free energy W(J) at large J and for the quantum effective action Gamma(A) at large A. We specialize to a source J(x)=h cos(kx) of definite momentum k and source strength h, and study the gluon propagator D(k,h) in the presence of this source. Among other relations, we prove int_0^inf dh D(k,h)0) D(k,h) = 0, for all positive h>0. Thus the system does not respond to a static color probe, no matter how strong. Recent lattice data in minimal Landau gauge in d =3 and 4 dimensions at h=0 indicate that the gluon propagator in the minimum Landau gauge is finite, lim_(k->0) D(k,0)>0. Thus these lattice data imply a jump in the value of D(k,h) at h=0 and k=0, and the value of D(k,h) at this point depends on the order of limits. We also present numerical evaluations of the free energy W(k,h) and the gluon propagator D(k,h) for the case of SU(2) Yang-Mills theory in various dimensions which support all of these findings.

Axel Maas; Daniel Zwanziger

2013-09-08T23:59:59.000Z

265

The Excited-state Spectrum of QCD through Lattice Gauge Theory Calculations  

Science Conference Proceedings (OSTI)

I describe recent progress at understanding the excited state spectrum of QCD through lattice gauge calculations. I begin by outlining the evolution of the lattice effort at JLab. I detail the impact of recent lattice calculations on the present and upcoming experimental programs, and in particular that of the 12 GeV upgrade of Jefferson Laboratory. I conclude with the prospect for future calculations.

David Richards

2012-12-01T23:59:59.000Z

266

Single site model of large N gauge theories coupled to adjoint fermions  

E-Print Network (OSTI)

We consider a single site large N gauge theory coupled to adjoint fermions at weak coupling. We study the distribution of the eigenvalues of the link variables using a four-dimensional density function. We show that it is possible to recover the infinite-volume continuum limit for a certain range of fermion flavors if we use fermions with a bare mass of zero.

Robert Lohmayer; Rajamani Narayanan

2013-11-12T23:59:59.000Z

267

Phases of a two-dimensional large-N gauge theory on a torus  

Science Conference Proceedings (OSTI)

We consider two-dimensional large N gauge theory with D adjoint scalars on a torus, which is obtained from a D+2-dimensional pure Yang-Mills theory on T{sup D+2} with D small radii. The two-dimensional model has various phases characterized by the holonomy of the gauge field around noncontractible cycles of the 2-torus. We determine the phase boundaries and derive the order of the phase transitions using a method developed in an earlier work (hep-th/0910.4526), which is nonperturbative in the 't Hooft coupling and uses a 1/D expansion. We embed our phase diagram in the more extensive phase structure of the D+2-dimensional Yang-Mills theory and match with the picture of a cascade of phase transitions found earlier in lattice calculations. We also propose a dual gravity system based on a Scherk-Schwarz compactification of a D2 brane wrapped on a 3-torus and find a phase structure which is similar to the phase diagram found in the gauge theory calculation.

Mandal, Gautam [Department of Theoretical Physics, Tata Institute of Fundamental Research, Mumbai 400 005 (India); Morita, Takeshi [Crete Center for Theoretical Physics Department of Physics University of Crete, 71003 Heraklion (Greece)

2011-10-15T23:59:59.000Z

268

A Non-Perturbative Study of Gauge Theory on a Non-Commutative Plane  

E-Print Network (OSTI)

We perform a non-perturbative study of pure gauge theory in a two dimensional non-commutative (NC) space. On the lattice, it is equivalent to the twisted Eguchi-Kawai model, which we simulated at N ranging from 25 to 515. We observe a clear large-N scaling for the 1- and 2-point function of Wilson loops, as well as the 2-point function of Polyakov lines. The 2-point functions agree with a universal wave function renormalization. Based on a Morita equivalence, the large-N double scaling limit corresponds to the continuum limit of NC gauge theory, so the observed large-N scaling demonstrates the non-perturbative renormalizability of this NC field theory. The area law for the Wilson loops holds at small physical area as in commutative 2d planar gauge theory, but at large areas we find an oscillating behavior instead. In that regime the phase of the Wilson loop grows linearly with the area. This agrees with the Aharonov-Bohm effect in the presence of a constant magnetic field, identified with the inverse non-commutativity parameter.

W. Bietenholz; F. Hofheinz; J. Nishimura

2002-03-16T23:59:59.000Z

269

The consequences of complex Lorentz force and violation of Lorenz gauge condition  

E-Print Network (OSTI)

The complex Lorentz force is introduced and extended to include magnetic scalar. This scalar is found to be associated with a prevailing magnetic field permeating the whole space. It also introduce an extra force in Lorentz complex force. The magnetic scalar is associated with the vacuum energy. The Proca-Maxwell's massive electrodynamics is derived from the extend current-density transformations. Proca-Maxwell's theory is found to be invariant under the extended gauge transformations (current-charge density). The Lorenz gauge condition is shown to express the photon charge conservation. Any violation of Lorenz gauge (photon charge) or electronic charge conservation would lead to spin zero scalar particles. This is manifested in superconductivity. The total charge comprising the electron and photon is always conserved. Owing to superconductivity, the photon charge is related to electron charge by $e_p=\\sqrt{\\frac{m_p}{m_e}}\\,\\,e$. Photons inside superconductors are shown to be massive. It is shown that Maxwell's equations expressed in complex form are more convenient to study duality transformations.

A. I. Arbab

2013-02-04T23:59:59.000Z

270

Shock initiation studies of low density HMX using electromagnetic particle velocity and PVDF stress gauges  

Science Conference Proceedings (OSTI)

Magnetic particle velocity and PVDF stress rate gauges have been used to measure the shock response of low density octotetramethylene tetranitramine (HMX) (1.24 &/cm{sup 3}). In experiments done at LANL, magnetic particle velocity gauges were located on both sides of the explosive. In nearly identical experiments done at SNL, PVDF stress rate gauges were located at the same positions so both particle velocity and stress histories were obtained for a particular experimental condition. Unreacted Hugoniot data were obtained and an EOS was developed by combining methods used by Hayes, Sheffield and Mitchell (for describing the Hugoniot of HNS at various densities) with Hermann`s P-{alpha} model. Using this technique, it is only necessary to know some thermodynamic constants or the Hugoniot of the initially solid material and the porous material sound speed to obtain accurate unreacted Hugoniots for the porous explosive. Loading and reaction paths were established in the stress-particle velocity plane for some experimental conditions. This information was used to determine a global reaction rate of {approx} 0.13 {mu}s{sup {minus}1} for porous HMX shocked to 0.8 GPa. At low input stresses the transmitted wave profiles had long rise times (up to 1 {mu}s) due to the compaction processes.

Sheffield, S.A.; Gustavsen, R.L.; Alcon, R.R. [Los Alamos National Lab., NM (United States); Graham, R.A.; Anderson, M.U. [Sandia National Labs., Albuquerque, NM (United States)

1993-09-01T23:59:59.000Z

271

Investigations in gauge theories, topological solitons and string theories. Final report  

SciTech Connect

This is the Final Report on a supported research project on theoretical particle physics entitled ``Investigations in Gauge Theories, Topological Solitons and String Theories.`` The major theme of particle theory pursued has been within the rubric of the standard model, particularly on the interplay between symmetries and dynamics. Thus, the research has been carried out primarily in the context of gauge with or without chiral fermions and in effective chiral lagrangian field theories. The topics studied include the physical implications of abelian and non-abelian anomalies on the spectrum and possible dynamical symmetry breaking in a wide range of theories. A wide range of techniques of group theory, differential geometry and function theory have been applied to probe topological and conformal properties of quantum field theories in two and higher dimensions, the breaking of global chiral symmetries by vector-like gauge theories such as QCD,the phenomenology of a possibly strongly interacting Higgs sector within the minimal standard model, and the relevance of solitonic ideas to non-perturbative phenomena at SSC energies.

Not Available

1993-06-01T23:59:59.000Z

272

Metal-Insulator Transition Revisited for Cold Atoms in Non-Abelian Gauge Potentials  

E-Print Network (OSTI)

We discuss the possibility of realizing metal-insulator transitions with ultracold atoms in two-dimensional optical lattices in the presence of artificial gauge potentials. Such transitions have been extensively studied for magnetic fields corresponding to Abelian gauges; they occur when the magnetic flux penetrating the lattice plaquette is an irrational multiple of the magnetic flux quantum. Here we present the first study of these transitions for non-Abelian U(2) gauge fields, which can be realized with atoms with two pairs of degenerate internal states. In contrast to the Abelian case, the spectrum and localization transition in the non-Abelian case is strongly influenced by atomic momenta. In addition to determining the localization boundary, the momentum fragments the spectrum and the minimum energy viewed as a function of momentum exhibits a step structure. Other key characteristics of the non-Abelian case include the absence of localization for certain states and satellite fringes around the Bragg peaks in the momentum distribution and an interesting possibility that the transition can be tuned by the atomic momenta.

Indubala I. Satija; Daniel C. Dakin; Charles W. Clark

2006-07-10T23:59:59.000Z

273

The Higgs Boson Mass and Ward-Takahashi Identity in Gauged Nambu-Jona-Lasinio Model  

E-Print Network (OSTI)

A new formula for the composite Higgs boson mass is given, based on the Ward-Takahashi identity and the Schwinger-Dyson(SD) equation. In this formula the dominant asymptotic solution of the SD equation yields a correct answer, in sharp contrast to the Partially Conserved Dilatation Current(PCDC) approach where the sub- and sub-sub-dominant solutions should be taken into account carefully. In the gauged Nambu-Jona-Lasinio model we find M_H \\simeq \\sqrt{2}M for the composite Higgs boson mass M_H and the dynamical mass of the fermion M in the case of the constant gauge coupling(with large cut off), which is consistent with the PCDC approach and the renormalization-group approach. As to the case of the running gauge coupling, we find M_H \\simeq 2 \\sqrt{(A-1)/(2A-1)}M, where A \\equiv 18 C_2 /(11N_c - 2N_f) with C_2 being the quadratic Casimir of the fermion representation. We also discuss a straightforward application of our formula to QCD(without 4-Fermi coupling), which yields M_{\\sigma} \\sim \\sqrt{2}M_{dyn}, with M_{\\sigma} and M_{dyn} being the light scalar(``\\sigma-meson'') mass and mass of the constituent quark, respectively.

Michio Hashimoto

1998-05-07T23:59:59.000Z

274

Variability of winter storminess in the eastern United States during the 20th century from tide gauges  

Science Conference Proceedings (OSTI)

Interannual to multidecadal variability of winter storminess in the eastern United States was studied using water level measurements from coastal tide gauges. The proximity to the coast of the primary winter storm track in the region allows the ...

Philip R. Thompson; Gary T. Mitchum; Cedric Vonesch; Jianke Li

275

Analysis of 2002 and 2003 Warm-Season Precipitation from the North American Monsoon Experiment Event Rain Gauge Network  

Science Conference Proceedings (OSTI)

Analyses of rainfall characteristics and their linkage to physiographic features are made from the North American monsoon experiment (NAME) Event Rain Gauge Network (NERN) in northwest Mexico. The findings are based on the network configuration ...

David J. Gochis; Alejandro Jimenez; Christopher J. Watts; Jaime Garatuza-Payan; W. James Shuttleworth

2004-12-01T23:59:59.000Z

276

APHRODITE: Constructing a Long-Term Daily Gridded Precipitation Dataset for Asia Based on a Dense Network of Rain Gauges  

Science Conference Proceedings (OSTI)

A daily gridded precipitation dataset covering a period of more than 57 yr was created by collecting and analyzing rain gauge observation data across Asia through the activities of the Asian Precipitation—Highly Resolved Observational Data Integration ...

Akiyo Yatagai; Kenji Kamiguchi; Osamu Arakawa; Atsushi Hamada; Natsuko Yasutomi; Akio Kitoh

2012-09-01T23:59:59.000Z

277

Gauge invariant effective action for the Polyakov line in the SU(N) Yang--Mills theory at high temperatures  

E-Print Network (OSTI)

We integrate out fast varying quantum fluctuations around static A_4 and A_i fields for the SU(N) gauge group. By assuming that the gluon fields are slowly varying but allowing for an arbitrary amplitude of A_4 we obtain two variants of the effective high-temperature theory for the Polyakov line. One is the effective action for the gauge-invariant eigenvalues of the Polyakov line, and it is explicitly Z(N) symmetric. The other is the effective action for the Polyakov line itself as an element of the SU(N). In this case the theory necessarily includes the spatial components A_i to ensure its gauge invariance under spatial gauge transformations. We derive the 1-loop effective action in the `electric' and `magnetic' sectors, summing up all powers of A_4.

Dmitri Diakonov; Michaela Oswald

2004-03-10T23:59:59.000Z

278

GAUGING APPARATUS  

DOE Patents (OSTI)

A swinging arm gage designed to measure radial angles, tapering, sloping, or arcuate concave surfaces is described. The principle of the swinging arm gage is that in any spherical system, radii and radial lines established by them pass through the center of the sphere. Thus if an arm be made to pivot at the sphere center, the path of the swinging end can be guided by a can so set as to establish the proper center angle, and dial indicators on the arm can be zeroed on a master object, angular and dimensional manufacturing errors can be determined on a duplicate object. This device makes possible a considerable saving of time in measuring complex arcuate contours.

Ruggles, C.A.

1957-08-27T23:59:59.000Z

279

Gamma-ray constraints on dark-matter annihilation to electroweak gauge and Higgs bosons  

E-Print Network (OSTI)

Dark-matter annihilation into electroweak gauge and Higgs bosons results in $\\gamma$-ray emission. We use observational upper limits on the fluxes of both line and continuum $\\gamma$-rays from the Milky Way Galactic Center and from Milky Way dwarf companion galaxies to set exclusion limits on allowed dark-matter masses. (Generally, Galactic Center $\\gamma$-ray line search limits from the Fermi-LAT and the H.E.S.S. experiments are most restrictive.) Our limits apply under the following assumptions: a) the dark matter species is a cold thermal relic with present mass density equal to the measured dark-matter density of the universe; b) dark-matter annihilation to standard-model particles is described in the non-relativistic limit by a single effective operator ${\\cal O} \\propto J_{DM}\\cdot J_{SM}$, where $J_{DM}$ is a standard-model singlet current consisting of dark-matter fields (Dirac fermions or complex scalars), and $J_{SM}$ is a standard-model singlet current consisting of electroweak gauge and Higgs bosons; and c) the dark-matter mass is in the range 5 GeV to 20 TeV. We consider, in turn, the 34 possible operators with mass dimension 8 or lower with non-zero s-wave annihilation channels satisfying the above assumptions. Our limits are presented in a large number of figures, one for each of the 34 possible operators; these limits can be grouped into 13 classes determined by the field content and structure of the operators. We also identify three classes of operators (coupling to the Higgs and $SU(2)_L$ gauge bosons) that can supply a 130 GeV line with the desired strength to fit the putative line signal in Fermi data, while saturating the relic density and satisfying all other indirect constraints we consider.

Michael A. Fedderke; Edward W. Kolb; Tongyan Lin; Lian-Tao Wang

2013-10-22T23:59:59.000Z

280

A Solution to the Strong CP Problem with Gauge-Mediated Supersymmetry Breaking  

E-Print Network (OSTI)

We demonstrate that a certain class of low scale supersymmetric ``Nelson-Barr'' type models can solve the strong and supersymmetric CP problems while at the same time generating sufficient weak CP violation in the $K^{0}-\\bar{K}^{0}$ system. In order to prevent one-loop corrections to $\\bar{\\theta}$ which violate bounds coming from the neutron electric dipole moment (EDM), one needs a scheme for the soft supersymmetry breaking parameters which can naturally give sufficient squark degeneracies and proportionality of trilinear soft supersymmetry-breaking parameters to Yukawa couplings. We show that a gauge-mediated supersymmetry breaking sector can provide the needed degeneracy and proportionality, though that proves to be a problem for generic Nelson-Barr models. The workable model we consider here has the Nelson-Barr mass texture enforced by a gauge symmetry; one also expects a new U(1) gauge superfield with mass in the TeV range. The resulting model is predictive. We predict a measureable neutron EDM and the existence of extra vector-like quark superfields which can be discovered at the LHC. Because the $3\\times 3$ Cabbibo-Kobayashi-Maskawa matrix is approximately real, the model also predicts a flat unitarity triangle and the absence of substantial CP violation in the $B$ system at future $B$ factories. We discuss the general issues pertaining to the construction of such a workable model and how they lead to the successful strategy. A detailed renormalization group study is then used to establish the feasibility of the model considered.

Otto C. W. Kong; Brian D. Wright

1998-02-03T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Holographic electrical and thermal conductivity in strongly coupled gauge theory with multiple chemical potentials  

E-Print Network (OSTI)

We study transport coefficients of strongly coupled gauge theory in the presence of multiple chemical potential which are dual to rotating D3, M2 and M5 brane. Using the general form of the perturbation equations, we compute DC-electrical conductivity at finite temperature as well as at zero temperature. We also study thermal conductivity for the same class of black holes and show that thermal conductivity and viscosity obeys Wiedemann-Franz like law even in the presence of multiple chemical potential.

Sachin Jain

2009-12-11T23:59:59.000Z

282

Dark matter and Higgs boson collider implications of fermions in an abelian-gauged hidden sector  

E-Print Network (OSTI)

We add fermions to an abelian-gauged hidden sector. We show that the lightest can be the dark matter with the right thermal relic abundance, and discovery is within reach of upcoming dark matter detectors. We also show that these fermions change Higgs boson phenomenology at the Large Hadron Collider (LHC), and in particular could induce a large invisible width to the lightest Higgs boson state. Such an invisibly decaying Higgs boson can be discovered with good significance in the vector boson fusion channel at the LHC.

Shrihari Gopalakrishna; Seung J. Lee; James D. Wells

2009-04-13T23:59:59.000Z

283

Partitioning of electric and magnetic energy in SU(2) gauge theory  

E-Print Network (OSTI)

This article provides some estimates for the relative sizes of the electric and magnetic contributions to the energy functional for the minimum energy configuration of an SU(2) gauge field on R^3 in the presence of an source in a fixed ball. The surprising fact is that the contribution to both energies from the free field region increases at worst linearly with the coupling, rather than quadratically. Moreover, the external electric field is severly surpressed outside the source at large coupling while the magnetic field is concentrated in a shell surrounding the source suggesting a classical mechanism for the formation of the 'MIT bag'.

Clifford H. Taubes

2002-01-22T23:59:59.000Z

284

The Integrable Bootstrap Program at Large N and its Applications in Gauge Theory  

E-Print Network (OSTI)

We present results for the large-$N$ limit of the (1+1)-dimensional principal chiral sigma model. This is an asymptotically-free $N\\times N$ matrix-valued field with massive excitations. All the form factors and the exact correlation functions of the Noether-current operator and the energy-momentum tensor are found, from Smirnov's form-factor axioms. We consider (2+1)-dimensional $SU(\\infty)$ Yang-Mills theory as an array of principal chiral models with a current-current interaction. We discuss how to use our new form factors to calculate physical quantities in this gauge theory.

Cubero, Axel Cortes

2013-01-01T23:59:59.000Z

285

Theta dependence of 4D SU(N) gauge theories at finite temperature  

E-Print Network (OSTI)

We report a study of the dependence of 4D SU(N) gauge theories on the topological theta term at finite temperature, and in particular in the large-N limit. We show that the theta dependence drastically changes across the deconfinement transition. The low-temperature phase is characterized by a large-N scaling with theta/N as relevant variable, while in the high-temperature phase the free energy is essentially determined by the dilute instanton-gas approximation, with a simple theta dependence of the free-energy density proportional to 1-Cos(theta).

Bonati, Claudio; Panagopoulos, Haralambos; Vicari, Ettore

2013-01-01T23:59:59.000Z

286

Gauge-mediated supersymmetry breaking with generalized messenger sector at LHC.  

E-Print Network (OSTI)

multiplets of SU(5) GUT symmetry. Such a situation may happen in the anomalous U(1) GUT scenario because the mass spectrum of the superheavy particle does not respect SU(5) GUT symmetry, although the success of the gauge coupling unification can be explained... , and therefore the NLSP is the bino-like neutralino ?˜01. 4 Note that there are almost no bounds for the mass of the lightest neutralino ?˜01 if ?˜ 0 1 is the pure bino and does not decay inside the detector. The GUT relation is essential to obtain the bound m?...

Kawase, Hidetoshi; Maekawa, Nobuhiro; Sakurai, Kazuki

287

Bulk Thermodynamics of SU(N) Lattice Gauge Theories at Large-N  

E-Print Network (OSTI)

We present a study of bulk thermodynamical quantities in the deconfined phase of pure lattice SU(N) gauge theories. We find that the deficit in pressure and entropy with respect to their free-gas values, for N=4,8, is remarkably close to that of SU(3). Th is suggests that understanding the strongly interacting nature of the deconfined phase, which is crucial for RHIC physics, can be done at large N. There, different analytical approaches simplify or become soluble, and one can check their predictions and point to their important ingredients.

Barak Bringoltz

2005-11-04T23:59:59.000Z

288

QCDOC - Gauge field configurations/Lattice Archives at Brookhaven National Laboratory (BNL)  

DOE Data Explorer (OSTI)

While many of the QCD lattice configurations developed by the various DOE groups working in this arena may be stored in the Gauge Connection at NERSC (see http://qcd.nersc.gov/), there are still small collections to be found elsewhere. The collection at Brookhaven National Laboratory is one of these, a small collection of configurations generated specifically by the QCDOC Collaboration. There is a small collection of publicly available configurations that can be accessed without registration. Group downloads require registration for a password.

None

289

The deconfining phase transition in D=2+1 SU(N) gauge theories  

E-Print Network (OSTI)

We study the deconfining transition of SU(N) gauge theories in 2+1 dimensions for N ranging between N=2 and N=8. We confirm that the transition is second order for NN>4. For the more delicate case of SU(4) all our evidence points to the transition being weakly first order. After extrapolating to the continuum limit, we obtain a deconfining temperature that can be well fitted by Tc/sqrt(sigma) = 0.9026(23) + 0.880(43)/N^2 for all N.

Jack Liddle; Michael Teper

2008-03-14T23:59:59.000Z

290

Simulated random surfaces and effective string models in 3D Z(2) gauge theory  

E-Print Network (OSTI)

All-order strong coupling simulations have been used to derive precise energies of string states in the confined phase of three dimensional Z(2) lattice gauge theory. The behavior of the ground state energy is here compared with predictions of effective string theory. Our new data reported here are consistent with known universal terms of the long string length ($L_0$) expansion known from effective string models in the continuum limit. Our precision is however still not sufficient to disentangle non-univeral terms of order $L_0^{-7}

Tomasz Korzec; Ulli Wolff

2013-09-05T23:59:59.000Z

291

Transport coefficients of strongly coupled gauge theories: insights from string theory  

E-Print Network (OSTI)

The transport properties of certain strongly coupled thermal gauge theories can be determined from their effective description in terms of gravity or superstring theory duals. Here we provide a short summary of the results for the shear and bulk viscosity, charge diffusion constant, and the speed of sound in supersymmetric strongly interacting plasmas. We also outline a general algorithm for computing transport coefficients in any gravity dual. The algorithm relates the transport coefficients to the coefficients in the quasinormal spectrum of five-dimensional black holes in asymptotically anti de Sitter space.

Andrei O. Starinets

2005-11-26T23:59:59.000Z

292

Non-perturbative scalar gauge-invariant metric fluctuations from the Ponce de Leon metric in the STM theory of gravity  

E-Print Network (OSTI)

We study our non-perturbative formalism to describe scalar gauge-invariant metric fluctuations by extending the Ponce de Leon metric.

Mariano Anabitarte; Mauricio Bellini

2007-10-08T23:59:59.000Z

293

Gluonic Higgs Scalar, Abelianization and Monopoles in QCD -- Similarity and Difference between QCD in the MA Gauge and the NAH Theory  

E-Print Network (OSTI)

We study the similarity and the difference between QCD in the maximally abelian (MA) gauge and the nonabelian Higgs (NAH) theory by introducing the ``gluonic Higgs scalar field'' $\\vec \\phi(x)$ corresponding to the ``color-direction'' of the nonabelian gauge connection. The infrared-relevant gluonic mode in QCD can be extracted by the projection along the color-direction $\\vec \\phi(x)$ like the NAH theory. This projection is manifestly gauge-invariant, and is mathematically equivalent to the ordinary MA projection. Since $\\vec \\phi(x)$ obeys the adjoint gauge transformation and is diagonalized in the MA gauge, $\\vec \\phi(x)$ behaves as the Higgs scalar in the NAH theory, and its hedgehog singularity provides the magnetic monopole in the MA gauge like the NAH theory. We observe this direct correspondence between the monopole appearing in the MA gauge and the hedgehog singularity of $\\vec \\phi(x)$ in lattice QCD, when the gluon field is continuous as in the SU($N_c$) Landau gauge. In spite of several similarities, QCD in the MA gauge largely differs from the NAH theory in the two points: one is infrared monopole condensation, and the other is infrared enhancement of the abelian correlation due to monopole condensation.

Hideo Suganuma; Hiroko Ichie

2004-07-07T23:59:59.000Z

294

An extra Z' gauge boson as a source of Higgs particles  

E-Print Network (OSTI)

Models with extra gauge bosons often require an extended Higgs sector, which contains a rich spectrum of Higgs bosons with properties that deviate from the Standard Model (SM). Such Higgs bosons could be searched using standard mechanisms similar to the SM. However, the existence of the new gauge bosons could provide new production mechanisms, which could probe the non-standard origin of the Higgs particle. In this paper we study how the Z' from a model with extra U(1)' could be used as a source of Higgs bosons. We study 3-bodies decays of the Z' into a Higgs boson and a top anti-top pair or WW pair, namely Z'\\to t\\bar{t} h, WW h. We find that it is possible to get {\\Br'}s as high as 10^{-2} for these modes, which could be studied at future colliders. We also study the production of the Higgs bosons in association with the Z vector boson at a linear collider, through the reaction e^+ e^- \\to Z, Z'\\to Z+h, including both the resonant and the non-resonant effects.

J. Lorenzo Diaz-Cruz; Javier M. Hernandez-Lopez; Javier A. Orduz-Ducuara

2013-03-29T23:59:59.000Z

295

Unique Identification of Lee-Wick Gauge Bosons at Linear Colliders  

E-Print Network (OSTI)

Grinstein, O'Connell and Wise have recently presented an extension of the Standard Model (SM), based on the ideas of Lee and Wick (LW), which demonstrates an interesting way to remove the quadratically divergent contributions to the Higgs mass induced by radiative corrections. This model predicts the existence of negative-norm copies of the usual SM fields at the TeV scale with ghost-like propagators and negative decay widths, but with otherwise SM-like couplings. In earlier work, it was demonstrated that the LW states in the gauge boson sector of these models, though easy to observe, cannot be uniquely identified as such at the LHC. In this paper, we address the issue of whether or not this problem can be resolved at an $e^+e^-$ collider with a suitable center of mass energy range. We find that measurements of the cross section and the left-right polarization asymmetry associated with Bhabha scattering can lead to a unique identification of the neutral electroweak gauge bosons of the Lee-Wick type.

Thomas G. Rizzo

2007-12-11T23:59:59.000Z

296

Aspects of N_{T}\\geq 2 Topological Gauge Theories and D-Branes  

E-Print Network (OSTI)

We comment on various aspects of topological gauge theories possessing N_{T}\\geq 2 topological symmetry: (1) We show that the construction of Vafa-Witten and Dijkgraaf-Moore of `balanced' topological field theories is equivalent to an earlier construction in terms of N_{T}=2 superfields inspired by Susy QM. (2) We explain the relation between topological field theories calculating signed and unsigned sums of Euler numbers of moduli spaces. (3) We show that the topological twist of N=4 d=4 Yang-Mills theory recently constructed by Marcus is formally a deformation of four-dimensional super-BF theory. (4) We construct a novel N_{T}=2 topological twist of N=4 d=3 Yang-Mills theory, a `mirror' of the Casson invariant model, with some unusual features. (5) We give a complete classification of the topological twists of N=8 d=3 Yang-Mills theory and show that they are realised as world-volume theories of Dirichlet two-brane instantons wrapping supersymmetric three-cycles of Calabi-Yau three-folds and G_{2}-holonomy Joyce manifolds. (6) We describe the topological gauge theories associated to D-string instantons on holomorphic curves in K3s and Calabi-Yau 3-folds.

Matthias Blau; George Thompson

1996-12-12T23:59:59.000Z

297

PyR@TE: Renormalization Group Equations for General Gauge Theories  

E-Print Network (OSTI)

Although the two-loop renormalization group equations for a general gauge field theory have been known for quite some time, deriving them for specific models has often been difficult in practice. This is mainly due to the fact that, albeit straightforward, the involved calculations are quite long, tedious and prone to error. The present work is an attempt to facilitate the practical use of the renormalization group equations in model building. To that end, we have developed two completely independent sets of programs written in Python and Mathematica, respectively. The Mathematica scripts will be part of an upcoming release of SARAH 4. The present article describes the collection of Python routines that we dubbed PyR@TE which is an acronym for "Python Renormalization group equations At Two-loop for Everyone". In PyR@TE, once the user specifies the gauge group and the particle content of the model, the routines automatically generate the full two-loop renormalization group equations for all (dimensionless and dimensionful) parameters. The results can optionally be exported to Latex and Mathematica, or stored in a Python data structure for further processing by other programs. For ease of use, we have implemented an interactive mode for PyR@TE in form of an IPython Notebook. As a first application, we have generated with PyR@TE the renormalization group equations for several non-supersymmetric extensions of the Standard Model and found some discrepancies with the existing literature.

Florian Lyonnet; Ingo Schienbein; Florian Staub; Akin Wingerter

2013-09-26T23:59:59.000Z

298

DeconfinementinYang-Mills: a conjecture for a general gauge Lie group G  

E-Print Network (OSTI)

Svetitsky and Yaffe have argued that — if the deconfinement phase transition of a (d+1)-dimensional Yang-Mills theory with gauge group G is second order — it should be in the universality class of a d-dimensional scalar model symmetric under the center C(G) of G. These arguments have been investigated numerically only considering Yang-Mills theory with gauge symmetry in the G = SU(N) branch, where C(G) = Z(N). The symplectic groups Sp(N) provide another extension of SU(2) = Sp(1) to general N and they all have the same center Z(2). Hence, in contrast to the SU(N) case, Sp(N) Yang-Mills theory allows to study the relevance of the group size on the order of the deconfinement phase transition keeping the available universality class fixed. Using lattice simulations, we present numerical results for the deconfinement phase transition in Sp(2) and Sp(3) Yang-Mills theories both in (2+1)d and (3+1)d. We then make a conjecture on the order of the deconfinement phase transition in Yang-Mills theories with general Lie groups SU(N), SO(N), Sp(N) and with exceptional groups G(2), F(4), E(6), E(7), E(8). Numerical results for G(2) Yang-Mills theory at finite temperature in (3 + 1)d are also presented.

M. Pepe A

2004-01-01T23:59:59.000Z

299

Placement accuracy gauge for electrical components and method of using same  

Science Conference Proceedings (OSTI)

Surface mounted electrical components are typically assembled on printed wiring boards by automatic machines. It is important that the machines accurately move with respect to both X and Y rotational axes in order to insure that components are positioned precisely on connector pads of the printed wiring board being assembled. In accordance with the instant invention, a gauge is used to facilitate convenient accuracy checks. The gauge is a glass substrate on which grids of 0.005 inch lines are scribed to form location and orientation fields where components are to be placed. The grids are referenced from either fiducial marks or the edge of the substrate to establish known positions within the grids. The equipment to be evaluated is programmed to place components in known positions and the components are held in place by tacky adhesive that is sprayed on the substrate prior to placing the components. The accuracy of the component position is then compared to the programmed position by placing the substrate on a light table and observing the component location. If a significant inaccuracy with respect to any of the axes exists, the inaccuracy is apparent because the component is not aligned properly with the grid. If a precise measurement of an axis inaccuracy is desired, a measuring microscope may be utilized.

Biggs, Peter M. (Overland Park, KS); Dancer, Linda K. (Independence, MO); Yerganian, Simon S. (Grandview, MO)

1988-10-11T23:59:59.000Z

300

Localizing gauge fields on a topological Abelian string and the Coulomb law  

Science Conference Proceedings (OSTI)

The confinement of electromagnetic field is studied in axial symmetrical, warped, six-dimensional brane world, using a recently proposed topological Abelian string-vortex solution as background. It was found, that the massless gauge field fluctuations follow four-dimensional Maxwell equations in the Lorenz gauge. The massless zero mode is localized when the thickness of the string vortex is less than 5{beta}/4{pi}e{sup 2}v{sup 2} and there are no other localized massless modes. There is also an infinite of nonlocalized massive Fourier modes, that follow four-dimensional Proca equations with a continuous spectrum. To compute the corrections to the Coulomb potential, a radial cutoff was introduced, in order to achieve a discrete mass spectrum. As a main result, a (R{sub o}/{beta}R{sup 2}) correction was found for the four-dimensional effective Coulomb law; the result is in correspondence with the observed behavior of the Coulomb potential at today's measurable distances.

Torrealba S, Rafael S. [Departamento de Fisica., Universidad Centro Occidental 'Lisandro Alvarado' (Venezuela, Bolivarian Republic of)

2010-07-15T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Finite energy global well-posedness of the Chern-Simons-Higgs equations in the Coulomb gauge  

E-Print Network (OSTI)

In a recent paper, Selberg-Tesfahun proved that the abelian Chern-Simons-Higgs system (CSH) is globally well-posed for finite energy initial data under the Lorenz gauge condition. It has been suspected by Huh, however, that such a result should hold in the Coulomb gauge as well. In this note, we give an affirmative answer to this question by first establishing low regularity local well-posededness of (CSH) in the Coulomb gauge for initial data set $(f, g) \\in H^{\\gamma}_{x} \\times H^{\\gamma-1}_{x}$ for any $\\gamma > 3/4$. Then by conservation of energy, global well-posedness for (CSH) in the energy space $(f, g) \\in H^{1}_{x} \\times L^{2}_{x}$ follows rather immediately.

Sung-Jin Oh

2013-10-15T23:59:59.000Z

302

Supersymmetry and Gauge Invariance Constraints in a U(1)$\\times $U(1)$^{\\prime }$-Higgs Superconducting Cosmic String Model  

E-Print Network (OSTI)

A supersymmetric extension of the $U(1)\\times U(1)^{\\prime }$-Higgs bosonic superconducting cosmic string model is considered,and the constraints imposed upon such a model due to renormalizability, supersymmetry, and gauge invariance are examined. For a simple model with a single $U(1)$ chiral superfield and a single $% U(1)^{\\prime }$ chiral superfield, the Witten mechanism for bosonic superconductivity (giving rise to long range gauge fields outside of the string) does not exist. The simplest model that can accommodate the requisite interactions requires five chiral supermultiplets. This superconducting cosmic string solution is investigated.

J. R. Morris

1995-11-10T23:59:59.000Z

303

DOE/SC-ARM/TR-079 Disdrometer and Tipping Bucket Rain Gauge  

NLE Websites -- All DOE Office Websites (Extended Search)

Disdrometer and Tipping Bucket Rain Gauge Handbook MJ Bartholomew December 2009 DISCLAIMER This report was prepared as an account of work sponsored by the U.S. Government. Neither the United States nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the U.S. Government or any agency thereof. The views and

304

Building Technologies Program: Tax Deduction Qualified Software - EnergyGauge Summit version 3.14  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

4 4 On this page you'll find information about the EnergyGauge Summit version 3.14 qualified computer software (www.buildings.energy.gov/qualified_software.html), which calculates energy and power cost savings that meet federal tax incentive requirements for commercial buildings (www.buildings.energy.gov/commercial/). Date Documentation Received by DOE: 21 December 2007 Statements in quotes are from the software developer. Internal Revenue Code §179D (c)(1) and (d) Regulations Notice 2006-52, Section 6 requirements (1) The name, address, and (if applicable) web site of the software developer; Florida Solar Energy Center 1679 Clearlake Road Cocoa, Florida 39922 www.energygauge.com (2) The name, email address, and telephone number of the person to contact for further

305

Building Technologies Program: Tax Deduction Qualified Software - EnergyGauge Summit version 3.13  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3 3 On this page you'll find information about the EnergyGauge Summit version 3.13 qualified computer software (www.buildings.energy.gov/qualified_software.html), which calculates energy and power cost savings that meet federal tax incentive requirements for commercial buildings (www.buildings.energy.gov/commercial/). Date Documentation Received by DOE: 23 November 2007 Statements in quotes are from the software developer. Internal Revenue Code §179D (c)(1) and (d) Regulations Notice 2006-52, Section 6 requirements (1) The name, address, and (if applicable) web site of the software developer; Florida Solar Energy Center 1679 Clearlake Road Cocoa, Florida 39922 www.energygauge.com (2) The name, email address, and telephone number of the person to contact for further

306

Building Technologies Program: Tax Deduction Qualified Software - EnergyGauge Summit version 3.11  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1 1 On this page you'll find information about the EnergyGauge Summit version 3.11 (incorporating DOE-2.1E version 120) qualified computer software (www.buildings.energy.gov/qualified_software.html), which calculates energy and power cost savings that meet federal tax incentive requirements for commercial buildings (www.buildings.energy.gov/commercial/). Date Documentation Received by DOE: 6 August 2007 Statements in quotes are from the software developer. Internal Revenue Code §179D (c)(1) and (d) Regulations Notice 2006-52, Section 6 requirements (1) The name, address, and (if applicable) web site of the software developer; Florida Solar Energy Center 1679 Clearlake Road Cocoa, Florida 39922 www.energygauge.com (2) The name, email address, and telephone

307

On group properties and reality conditions of UOSp(1|2) gauge transformations  

E-Print Network (OSTI)

For osp(1|2;C) graded Lie algebra, which proper Lie subalgebra is su(2), we consider the Baker-Campbell-Hausdorff formula and formulate a reality condition for the Grassmann-odd transformation parameters that multiply the pair of odd generators of the graded Lie algebra. Utilization of su(2)-spinors clarifies the nature of Grassmann-odd transformation parameters and allow us an investigation of the corresponding infinitesimal gauge transformations. We also explore action of the corresponding group element of UOSp(1|2) on an appropriately graded representation space and find that the graded generalization of hermitian conjugation is compatible with the Dirac adjoint. Consistency of generalized (graded) unitary condition with the proposed reality condition is shown.

Kostyantyn Ilyenko

2008-11-10T23:59:59.000Z

308

Unified gauge theory for electromagnetism and gravitation based on twistor bundles  

SciTech Connect

A unified gauge theory of the combined gravitational and electromagnetic fields is obtained by two different procedures using twistors as a starting point for the construction of the appropriate bundles. One of these formalisms is obtained by relaxing the conditions on the structure of a twistor bundle theory previously developed by the authors for the Poincare group as the structure group. The other formalism is based on a tensor product bundle and can be readily extended to include structure groups involving direct products of nonabelian groups with the Poincare group. The results of the theory are compared with those obtained in projective theories of the generalized Jordan--Kaluza--Klein type, and some of the essential differences are pointed out.

Luehr, C.P.; Rosenbaum, M.

1984-02-01T23:59:59.000Z

309

Lectures on 2d Gauge Theories: Topological Aspects and Path Integral Techniques  

E-Print Network (OSTI)

These are lecture notes of lectures presented at the 1993 Trieste Summer School, dealing with two classes of two-dimensional field theories, (topological) Yang-Mills theory and the G/G gauged WZW model. The aim of these lectures is to exhibit and extract the topological information contained in these theories, and to present a technique (a Weyl integral formula for path integrals) which allows one to calculate directly their partition function and topological correlation functions on arbitrary closed surfaces. Topics dealt with are (among others): solution of Yang-Mills theory on arbitrary surfaces; calculation of intersection numbers of moduli spaces of flat connections; coupling of Yang-Mills theory to coadjoint orbits and intersection numbers of moduli spaces of parabolic bundles; derivation of the Verlinde formula from the G/G model; derivation of the shift k to k+h in the G/G model via the index of the twisted Dolbeault complex.

Matthias Blau; George Thompson

1993-10-21T23:59:59.000Z

310

Near the sill of the conformal window: gauge theories with fermions in two-index representations  

E-Print Network (OSTI)

We apply Schroedinger functional methods to two gauge theories with fermions in two-index representations: the SU(3) theory with Nf=2 adjoint fermions, and the SU(4) theory with Nf=6 fermions in the two-index antisymmetric representation. Each theory is believed to lie near the bottom of the conformal window for its respective representation. In the SU(3) theory we find a small beta function in strong coupling but we cannot confirm or rule out an infrared fixed point. In the SU(4) theory we find a hint of walking - a beta function that approaches the axis and then turns away from it. In both theories the mass anomalous dimension remains small even at the strongest couplings, much like the theories with fermions in the two-index symmetric representation investigated earlier.

Thomas DeGrand; Yigal Shamir; Benjamin Svetitsky

2013-07-09T23:59:59.000Z

311

Two-point gauge invariant quark Green's functions with polygonal phase factor lines  

E-Print Network (OSTI)

Polygonal lines are used for the paths of the gluon field phase factors entering in the definition of gauge invariant quark Green's functions. This allows classification of the Green's functions according to the number of segments the polygonal lines contain. Functional relations are established between Green's functions with polygonal lines with different numbers of segments. An integrodifferential equation is obtained for the quark two-point Green's function with a path along a single straight line segment where the kernels are represented by a series of Wilson loop averages along polygonal contours. The equation is exactly and analytically solved in the case of two-dimensional QCD in the large-$N_c$ limit. The solution displays generation of an infinite number of dynamical quark masses accompanied with branch point singularities that are stronger than simple poles. An approximation scheme, based on the counting of functional derivatives of Wilson loops, is proposed for the resolution of the equation in four dimensions.

H. Sazdjian

2013-10-24T23:59:59.000Z

312

Fusion of Superalgebras and D=3, N=4 Quiver Gauge Theories  

E-Print Network (OSTI)

For further investigating the underlying structures of the D=3, N=4 Chern-Simons-matter (CSM) theories, we suggest a new concept and procedure for "fusing" two superalgebras into a single new superalgebra. The starting superalgebras may be those used in the previous construction of the double-symplectic 3-algebras in the N=4 CSM theories: The bosonic parts of these two superalgebras share at least one simple factor or U(1) factor. We are able to provide two different methods to do the "fusion". Several explicit examples are presented to demonstrate the "fusion" procedure. We also generalize the "fusion" procedure so that more than two superaglebras can be fused into a single one, provided some conditions are satisfied. It is shown that two or more N=4 theories with different gauge groups may be associated with the same "fused" superalgebra.

Fa-Min Chen; Yong-Shi Wu

2012-12-29T23:59:59.000Z

313

Quantum oscillations in ultracold Fermi gases : realizations with rotating gases or artificial gauge fields  

E-Print Network (OSTI)

We consider the angular momentum of a harmonically trapped, noninteracting Fermi gas subject to either rotation or to an artificial gauge field. The angular momentum of the gas is shown to display oscillations as a function of the particle number or chemical potential. This phenomenon is analogous to the de Haas - van Alphen oscillations of the magnetization in the solid-state context. However, key differences exist between the solid-state and ultracold atomic gases that we point out and analyze. We explore the dependence of the visibility of these oscillations on the physical parameters and propose two experimental protocols for their observation. Due to the very strong dependence of the amplitude of the oscillations on temperature, we propose their use as a sensitive thermometer for Fermi gases in the low temperature regime.

Charles Grenier; Corinna Kollath; Antoine Georges

2012-12-26T23:59:59.000Z

314

Fractional quantum Hall states of few bosonic atoms in geometric gauge fields  

E-Print Network (OSTI)

We employ the exact diagonalization method to analyze the possibility of generating strongly correlated states in two-dimensional clouds of ultracold bosonic atoms which are subjected to a geometric gauge field created by coupling two internal atomic states to a laser beam. Tuning the gauge field strength, the system undergoes stepwise transitions between different ground states, which we describe by analytical trial wave functions, amongst them the Pfaffian, the Laughlin, and a Laughlin quasiparticle many-body state. The adiabatic following of the center of mass movement by the lowest energy dressed internal state, is lost by the mixing of the second internal state. This mixture can be controlled by the intensity of the laser field. The non-adiabaticity is inherent to the considered setup, and is shown to play the role of circular asymmetry. We study its influence on the properties of the ground state of the system. Its main effect is to reduce the overlap of the numerical solutions with the analytical trial expressions by occupying states with higher angular momentum. Thus, we propose generalized wave functions arising from the Laughlin and Pfaffian wave function by including components, where extra Jastrow factors appear, while preserving important features of these states. We analyze quasihole excitations over the Laughlin and generalized Laughlin states, and show that they possess effective fractional charge and obey anyonic statistics. Finally, we study the energy gap over the Laughlin state as the number of particles is increased keeping the chemical potential fixed. The gap is found to decrease as the number of particles is increased, indicating that the observability of the Laughlin state is restricted to a small number of particles.

B. Juliá-Díaz; T. Graß; N. Barberán; M. Lewenstein

2011-11-03T23:59:59.000Z

315

String tension scaling in high-temperature confined SU(N) gauge theories  

Science Conference Proceedings (OSTI)

SU(N) gauge theories, extended with adjoint fermions having periodic boundary conditions, are confining at high temperature for sufficiently light fermion mass m. In the high-temperature confining region, the one-loop effective potential for Polyakov loops has a Z(N)-symmetric confining minimum. String tensions associated with Polyakov loops are calculable in perturbation theory, and display a novel scaling behavior in which higher representations have smaller string tensions than the fundamental representation. In the magnetic sector, the Polyakov loop plays a role similar to a Higgs field, leading to an apparent breaking of SU(N) to U(1){sup N-1}. This in turn yields a dual effective theory where magnetic monopoles give rise to string tensions for spatial Wilson loops. The spatial string tensions arise semiclassically from kink solutions of the dual system. We prove that the spatial string tensions {sigma}{sub k}{sup (s)} associated with each N-ality k are constrained by a rigorous upper bound. This bound is saturated for N=2 and 3, but is insufficient to determine the spatial string tension scaling law for N{>=}4. Lattice simulations indicate that the high-temperature confining region is smoothly connected to the confining region of low-temperature pure SU(N) gauge theory. However, our results show that the string tension scaling behavior of the low-temperature region does not hold for the electric sector in the high-temperature region, and may not hold in the magnetic sector. The predicted change in the behavior of the electric sector should be readily distinguishable in lattice simulations.

Meisinger, Peter N.; Ogilvie, Michael C. [Department of Physics, Washington University, Saint Louis, Missouri 63130 (United States)

2010-01-15T23:59:59.000Z

316

A Study of Regional Precipitation Trends in Iceland Using a High-Quality Gauge Network and ERA-40  

Science Conference Proceedings (OSTI)

The climatic variability and trends of precipitation in Iceland are examined for the period 1961–2000 using bias-corrected rain gauge data and precipitation forecasts from the 40-yr ECMWF Re-Analysis (ERA-40). Several quantities are studied: the ...

Philippe Crochet

2007-09-01T23:59:59.000Z

317

Direct 4D-Var Assimilation of NCEP Stage IV Radar and Gauge Precipitation Data at ECMWF  

Science Conference Proceedings (OSTI)

Direct four-dimensional variational data assimilation (4D-Var) of NCEP stage IV radar and gauge precipitation observations over the eastern United States has been developed and tested in ECMWF’s global Integrated Forecasting System. This is the ...

Philippe Lopez

2011-07-01T23:59:59.000Z

318

A Methodology for Finding Invariants of Motion for Asymmetric Systems with Gauge-Transformed Umbra Lagrangian Generated by Bond Graphs  

Science Conference Proceedings (OSTI)

The purpose of this article is to obtain conservation laws (invariants of motion) for different energy domains through the extended Noether theorem and bond graphs. Bond graphs are profitably used in representing the physics of a system as well as obtaining ... Keywords: Bond graphs, Noether's theorem, gauge-transformed umbra-Lagrangian, invariants of motion, umbra-Lagrangian

Amalendu Mukherjee; Vikas Rastogi; Anirvan Dasgupta

2006-04-01T23:59:59.000Z

319

Further study of an approach to the unification of gauge symmetries in theories with dynamical symmetry breaking  

Science Conference Proceedings (OSTI)

We extend to larger unification groups an earlier study exploring the possibility of unification of gauge symmetries in theories with dynamical symmetry breaking. Based on our results, we comment on the outlook for models that seek to achieve this type of unification.

Chen Ning; Shrock, Robert [C.N. Yang Institute for Theoretical Physics, Stony Brook University, Stony Brook, New York 11794 (United States)

2008-08-01T23:59:59.000Z

320

CAMS–OPI: A Global Satellite–Rain Gauge Merged Product for Real-Time Precipitation Monitoring Applications  

Science Conference Proceedings (OSTI)

A method has been developed to produce real-time rain gauge–satellite merged analyses of global monthly precipitation. A dataset of these analyses spans the period from January 1979 to the present, which is sufficiently long to allow the ...

John E. Janowiak; Pingping Xie

1999-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Frequency of Heavy Rainstorms on Areas from 10 to 10 000 km2, Defined Using Dense Rain Gauge Networks  

Science Conference Proceedings (OSTI)

Operation in Illinois of eight dense rain gauge networks of varying sizes, with each operating for 5–22 yr, provided data used to assess the temporal frequency of very heavy rain events on small- to moderate-sized areas. Initial testing reveals ...

Stanley A. Changnon

2002-04-01T23:59:59.000Z

322

Determination of a Z-R Relationship for Snowfall Using a Radar and High Sensitivity Snow Gauges  

Science Conference Proceedings (OSTI)

A best-fit power-law relationship (Z = 427 R1.09) between 1-minute integrated averages of snowfall rate (R) and radar reflectivity factor (Z) was determined on the basis of observations made by using high sensitivity snow gauges (accuracy 0.03 mm ...

Yasushi Fujiyoshi; Tatsuo Endoh; Tomomi Yamada; Kazuhisa Tsuboki; Yoshihiro Tachibana; Gorow Wakahama

1990-02-01T23:59:59.000Z

323

Integrable Scalar Cosmologies II. Can they fit into Gauged Extended Supergavity or be encoded in N=1 superpotentials?  

E-Print Network (OSTI)

The question whether the integrable one-field cosmologies classified in a previous paper by Fre, Sagnotti and Sorin can be embedded as consistent one-field truncations into Extended Gauged Supergravity or in N=1 supergravity gauged by a superpotential without the use of D-terms is addressed in this paper. The answer is that such an embedding is very difficult and rare but not impossible. Indeed we were able to find two examples of integrable models embedded in Supergravity in this way. Both examples are fitted into N=1 Supergravity by means of a very specific and interesting choice of the superpotential W(z). The question whether there are examples of such an embedding in extended Gauged Supergravity remains open. In the present paper, relying on the embedding tensor formalism we classified all gaugings of the N=2 STU model, confirming, in the absence on hypermultiplets, the uniqueness of the stable de Sitter vacuum found several years ago by Fre, Trigiante and Van Proeyen and excluding the embedding of any i...

Fre, P; Trigiante, M

2013-01-01T23:59:59.000Z

324

Study of Possible Ultraviolet Zero of the Beta Function in Gauge Theories with Many Fermions  

E-Print Network (OSTI)

We study the possibility of an ultraviolet (UV) zero in the $n$-loop beta function of U(1) and non-Abelian gauge theories with $N_f$ fermions for large $N_f$. The effect of scheme transformations on the coefficients of different powers of $N_f$ in the $n$-loop term in the beta function is calculated. A general scheme-independent criterion is given for determining whether or not the $n$-loop beta function has a UV zero for large $N_f$. We compare the results with exact integral representations of the leading terms in the beta functions for the respective Abelian and non-Abelian theories in the limit $N_f \\to \\infty$ limit with $N_f \\alpha$ finite. As part of this study, new analytic and numerical results are presented for certain coefficients, denoted $b_{n,n-1}$, that control the large-$N_f$ behavior at $n$-loop order in the beta function. We also investigate various test functions incorporating a power-law and essential UV zero in the beta function and determine their manifestations in series expansions in powers of coupling and in powers of $1/N_f$.

Robert Shrock

2013-11-20T23:59:59.000Z

325

Gauge-Invariant Formalism with a Dirac-mode Expansion for Confinement and Chiral Symmetry Breaking  

E-Print Network (OSTI)

Using the eigen-mode of the QCD Dirac operator $\\Slash D=\\gamma^\\mu D^\\mu$, we develop a manifestly gauge-covariant expansion and projection of the QCD operators such as the Wilson loop and the Polyakov loop. With this method, we perform a direct analysis of the correlation between confinement and chiral symmetry breaking in lattice QCD Monte Carlo calculation on $6^4$ at $\\beta$=5.6. Even after removing the low-lying Dirac modes, which are responsible to chiral symmetry breaking, we find that the Wilson loop obeys the area law, and the slope parameter corresponding to the string tension or the confinement force is almost unchanged. We find also that the Polyakov loop remains to be almost zero even without the low-lying Dirac modes, which indicates the $Z_3$-unbroken confinement phase. These results indicate that one-to-one correspondence does not hold for between confinement and chiral symmetry breaking in QCD.

Shinya Gongyo; Takumi Iritani; Hideo Suganuma

2012-02-19T23:59:59.000Z

326

Gauge bosons and heavy quarks: Proceedings of Summer Institute on Particle Physics  

SciTech Connect

This report contains papers on the following topics: Z decays and tests of the standard model; future possibilities for LEP; studies of the interactions of electroweak gauge bosons; top quark topics; the next linear collider; electroweak processes in hadron colliders; theoretical topics in B-physics; experimental aspects of B-physics; B-factory storage ring design; rare kaon decays; CP violation in K{sup 0} decays at CERN; recent K{sup 0} decay results from Fermilab E-731; results from LEP on heavy quark physics; review of recent results on heavy flavor production; weak matrix elements and the determination of the weak mixing angles; recent results from CLEO I and a glance at CLEO II data; recent results from ARGUS; neutrino lepton physics with the CHARM 2 detector; recent results from the three TRISTAN experiments; baryon number violation at high energy in the standard model: fact or fiction New particle searches at LEP; review of QCD at LEP; electroweak interactions at LEP; recent results on W physics from the UA2 experiment at the CERN {rho}{bar {rho}} collider; B physics at CDF; and review of particle astrophysics.

Hawthorne, J.F. (ed.)

1991-01-01T23:59:59.000Z

327

Gauge invariant non-linear electrodynamics motivated by a spontaneous breaking of the Lorentz symmetry  

E-Print Network (OSTI)

We introduce a new version of non-linear electrodynamics which is produced by a spontaneous symmetry breaking of Lorentz invariance induced by the non-zero expectation value of the electromagnetic field strength. The symmetry breaking potential is argued to effectively arise from the integration of massive gauge bosons and fermions in an underlying fundamental theory. All possible choices of the vacuum lead only to the remaining invariant subgroups T(2) and HOM(2). We explore the plane wave solutions of the linearized sector of the model for an arbitrary vacuum. They present two types of dispersion relations. One corresponds to the case of the usual Maxwell electrodynamics with the standard polarization properties of the fields. The other dispersion relation involves anisotropies determined by the structure of the vacuum. The model is stable in the small Lorentz invariance violation approximation. We have embedded our model in the photon sector of the Standard Model Extension in order to set bounds for our parameters. The one-way anisotropic speed of light is calculated for a general vacuum and its isotropic component is strongly bounded by ${\\tilde \\delta c}/c alternative definition for the difference of the two-way speed of light in perpendicular directions $\\Delta c$, which is also strongly bounded by ${\\Delta c}/c energy of the model with the cosmological constant and propose a connection between the vacuum fields and the intergalactic magnetic fields.

Jorge Alfaro; Luis F. Urrutia

2009-12-16T23:59:59.000Z

328

Acceleration, Energy Loss and Screening in Strongly-Coupled Gauge Theories  

E-Print Network (OSTI)

We explore various aspects of the motion of heavy quarks in strongly-coupled gauge theories, employing the AdS/CFT correspondence. Building on earlier work by Mikhailov, we study the dispersion relation and energy loss of an accelerating finite-mass quark in N=4 super-Yang-Mills, both in vacuum and in the presence of a thermal plasma. In the former case, we notice that the application of an external force modifies the dispersion relation. In the latter case, we find in particular that when a static heavy quark is accelerated by an external force, its rate of energy loss is initially insensitive to the plasma, and there is a delay before this rate approaches the value derived previously from the analysis of stationary or late-time configurations. Following up on work by Herzog et al., we also consider the evolution of a quark and antiquark as they separate from one another after formation, learning how the AdS/CFT setup distinguishes between the singlet and adjoint configurations, and locating the transition to the stage where the deceleration of each particle is properly accounted for by a constant friction coefficient. Additionally, we examine the way in which the energy of a quark-antiquark pair moving jointly through the plasma scales with the quark mass. We find that the velocity-dependence of the screening length is drastically modified in the ultra-relativistic region, and is comparable with that of the transition distance mentioned above.

Mariano Chernicoff; Alberto Guijosa

2008-03-20T23:59:59.000Z

329

Gravitino thermal production revisited and a new cosmological scenario of gauge mediation  

E-Print Network (OSTI)

We present a new scenario of gravitino dark matter which is compatible with the thermal leptogenesis. We confirm by an explicit calculation in supergravity that the relic abundance of thermally produced gravitino becomes insensitive to the reheating temperature once the temperature of the Universe exceeds the mass scale of the messenger fields. In such a situation, the correct baryon to dark matter ratio can be obtained by thermal leptogenesis when the reheating temperature after inflation is high enough. We demonstrate in a concrete model of gauge mediation that the correct abundance of gravitino and baryon asymmetry can be reproduced by considering the late-time entropy production from the decay of the SUSY-breaking pseudo-moduli field. The scenario is realized when the gravitino mass is 100 MeV lesssim m_{3/2} lesssim 1 GeV, and the messenger mass scale is 10^6 GeV lesssim M_{mess} lesssim 10^9 GeV.

Hiraku Fukushima; Ryuichiro Kitano

2013-11-25T23:59:59.000Z

330

Dirac Type Gauge Theories and the Mass of the Higgs Boson  

E-Print Network (OSTI)

We discuss the mass of the (physical component of the) Higgs boson in one-loop and top-quark mass approximation. For this the minimal Standard Model is regarded as a specific (parameterized) gauge theory of Dirac type. It is shown that the latter formulation, in contrast to the usual description of the Standard Model, gives a definite value for the Higgs mass. The predicted value for the Higgs mass depends on the value addressed to the top mass m_T. We obtain m_H= 186 \\pm 8 GeV for m_T = 174 \\pm 3 GeV (direct observation of top events), resp. m_H = 184 \\pm 22 GeV for m_T = 172 \\pm 10 GeV (Standard Model electroweak fit). Although the Higgs mass is predicted to be near the upper bound, m_H is in full accordance with the range 114 \\leq m_H < 193 GeV that is allowed by the Standard Model. We show that the inclusion of (Dirac) massive neutrinos does not alter the results presented. We also briefly discuss how the derived mass values are related to those obtained within the frame of non-commutative geometry.

Juergen Tolksdorf; Torsten Thumstaedter

2006-02-12T23:59:59.000Z

331

NNLO Benchmarks for Gauge and Higgs Boson Production at TeV Hadron Colliders  

E-Print Network (OSTI)

The inclusive production cross sections for $W^+, W^-$ and $Z^0$-bosons form important benchmarks for the physics at hadron colliders. We perform a detailed comparison of the predictions for these standard candles based on recent next-to-next-to-leading order (NNLO) parton parameterizations and new analyses including the combined HERA data, compare to all available experimental results, and discuss the predictions for present and upcoming RHIC, SPS, Tevatron and LHC energies. The rates for gauge boson production at the LHC can be rather confidently predicted with an accuracy of better than about 10% at NNLO. We also present detailed NNLO predictions for the Higgs boson production cross sections for Tevatron and LHC energies (1.96, 7, 8, 14 TeV), and propose a possible method to monitor the gluon distribution experimentally in the kinematic region close to the mass range expected for the Higgs boson. The production cross sections of the Higgs boson at the LHC are presently predicted with an accuracy of about 10--17%. The inclusion of the NNLO contributions is mandatory for achieving such accuracies since the total uncertainties are substantially larger at NLO.

S. Alekhin; J. Blümlein; P. Jimenez-Delgado; S. Moch; E. Reya

2010-11-29T23:59:59.000Z

332

On the short-distance structure of irrational non-commutative gauge theories  

E-Print Network (OSTI)

As shown by Hashimoto and Itzhaki in hep-th/9911057, the perturbative degrees of freedom of a non-commutative Yang-Mills theory (NCYM) on a torus are quasi-local only in a finite energy range. Outside that range one may resort to a Morita equivalent (or T-dual) description appropriate for that energy. In this note, we study NCYM on a non-commutative torus with an irrational deformation parameter $\\theta$. In that case, an infinite tower of dual descriptions is generically needed in order to describe the UV regime. We construct a hierarchy of dual descriptions in terms of the continued fraction approximations of $\\theta$. We encounter different descriptions depending on the level of the irrationality of $\\theta$ and the amount of non-locality tolerated. The behavior turns out to be isomorphic to that found for the phase structure of the four-dimensional Villain $Z_N$ lattice gauge theories, which we revisit as a warm-up. At large 't Hooft coupling, using the AdS/CFT correspondance, we find that there are domains of the radial coordinate $U$ where no T-dual description makes the derivative expansion converge. The radial direction obtains multifractal characteristics near the boundary of AdS.

S. Elitzur; B. Pioline; E. Rabinovici

2000-09-01T23:59:59.000Z

333

Topology of SU(N) gauge theories at T=0 and T=Tc  

E-Print Network (OSTI)

We calculate the topological charge density of SU(N) lattice gauge fields for values of N up to N=8. Our T=0 topological susceptibility appears to approach a finite non-zero limit at N=infinity that is consistent with earlier extrapolations from smaller values of N. Near the deconfining temperature Tc we are able to investigate separately the confined and deconfined phases, since the transition is quite strongly first order. We find that the topological susceptibility of the confined phase is always very similar to that at T=0. By contrast, in the deconfined phase at larger N there are no topological fluctuations except for rare, isolated and small instantons. This shows that as N->infinity the large-T suppression of large instantons and the large-N suppression of small instantons overlap, even at T=Tc, so as to suppress all topological fluctuations in the deconfined phase. In the confined phase by contrast, the size distribution is much the same at all T, becoming more peaked as N grows, suggesting that D(rho) is proportional to a delta function at N=infinity, centered on rho close to 1/Tc.

Biagio Lucini; Michael Teper; Urs Wenger

2004-01-20T23:59:59.000Z

334

A note on the (anti-)BRST invariant Lagrangian densities for the free abelian 2-form gauge theory  

E-Print Network (OSTI)

We show that the previously known off-shell nilpotent (s_{(a)b}^2 = 0) and absolutely anticommuting (s_b s_{ab} + s_{ab} s_b = 0) Becchi-Rouet-Stora-Tyutin (BRST) transformations (s_b) and anti-BRST transformations (s_{ab}) are the symmetry transformations of the appropriate Lagrangian densities of a four (3 + 1)-dimensional (4D) free Abelian 2-form gauge theory which do not explicitly incorporate a very specific constrained field condition through a Lagrange multiplier 4D vector field. The above condition, which is the analogue of the Curci-Ferrari restriction of the non-Abelian 1-form gauge theory, emerges from the Euler-Lagrange equations of motion of our present theory and ensures the absolute anticommutativity of the transformations s_{(a)b}. Thus, the coupled Lagrangian densities, proposed in our present investigation, are aesthetically more appealing and more economical.

Saurabh Gupta; R. P. Malik

2008-05-08T23:59:59.000Z

335

Nilpotent (anti-)BRST symmetry transformations for dynamical non-Abelian 2-form gauge theory: superfield formalism  

E-Print Network (OSTI)

We derive the off-shell nilpotent and absolutely anticommuting Becchi-Rouet-Stora-Tyutin (BRST) and anti-BRST symmetry transformations for the dynamical non-Abelian 2-form gauge theory within the framework of geometrical superfield formalism. We obtain the (anti-) BRST invariant coupled Lagrangian densities that respect the above nilpotent symmetry transformations. We discuss, furthermore, this (anti-) BRST invariance in the language of the superfield formalism. One of the novel features of our investigation is the observation that, in addition to the horizontality condition, we have to invoke some other physically relevant restrictions to deduce the exact (anti-) BRST symmetry transformations for all the fields of the topologically massive non-Abelian gauge theory.

R. P. Malik

2010-05-27T23:59:59.000Z

336

Flux tube widening in compact U (1) lattice gauge theory computed at T < Tc with the multilevel method and GPUs  

E-Print Network (OSTI)

We utilize Polyakov loop correlations to study d=3+1 compact U (1) flux tubes and the static electron-positron potential in lattice gauge theory. With the plaquette field operator, in U(1) lattice gauge theory, we probe directly the components of the electric and magnetic fields. In order to improve the signal-to-noise ratio in the confinement phase, we apply the L\\"uscher-Weiss multilevel algorithm. Our code is written in CUDA, and we run it in NVIDIA FERMI generation GPUs, in order to achieve the necessary efficiency for our computations. We measure in detail the quantum widening of the flux tube, as a function of the intercharge distance and at different finite temperatures T < Tc . Our results are compatible with the Effective String Theory.

A. Amado; N. Cardoso; P. Bicudo

2013-09-16T23:59:59.000Z

337

Flux tube widening in compact U (1) lattice gauge theory computed at T < Tc with the multilevel method and GPUs  

E-Print Network (OSTI)

We utilize Polyakov loop correlations to study d=3+1 compact U (1) flux tubes and the static electron-positron potential in lattice gauge theory. With the plaquette field operator, in U(1) lattice gauge theory, we probe directly the components of the electric and magnetic fields. In order to improve the signal-to-noise ratio in the confinement phase, we apply the L\\"uscher-Weiss multilevel algorithm. Our code is written in CUDA, and we run it in NVIDIA FERMI generation GPUs, in order to achieve the necessary efficiency for our computations. We measure in detail the quantum widening of the flux tube, as a function of the intercharge distance and at different finite temperatures T < Tc . Our results are compatible with the Effective String Theory.

Amado, A; Bicudo, P

2013-01-01T23:59:59.000Z

338

Study of Scheme Transformations to Remove Higher-Loop Terms in the $?$ Function of a Gauge Theory  

E-Print Network (OSTI)

Since three-loop and higher-loop terms in the $\\beta$ function of a gauge theory are scheme-dependent, one can, at least for sufficiently small coupling, carry out a scheme transformation that removes these terms. A basic question concerns the extent to which this can be done at an infrared fixed point of an asymptotically free gauge theory. This is important for quantitative analyses of the scheme dependence of such a fixed point. Here we study a scheme transformation $S_{R,m}$ with $m \\ge 2$ that is constructed so as to remove the terms in the beta function at loop order $\\ell=3$ to $\\ell=m+1$, inclusive. Starting from an arbitrary initial scheme, we present general expressions for the coefficients of terms of loop order $\\ell$ in the beta function in the transformed scheme from $\\ell=m+2$ up to $\\ell=8$. Extending a previous study of $S_{R,2}$, we investigate the range of applicability of the $S_{R,3}$ scheme transformation in an asymptotically free SU($N_c$) gauge theory with an infrared zero in $\\beta$ depending on the number, $N_f$, of fermions in the theory. We show that this $S_{R,3}$ scheme transformation can only be applied self-consistently in a restricted range of $N_f$ with a correspondingly small value of infrared fixed-point coupling. We also study the effect of higher-loop terms on the beta function of a U(1) gauge theory.

Robert Shrock

2013-05-28T23:59:59.000Z

339

Integrable Scalar Cosmologies II. Can they fit into Gauged Extended Supergavity or be encoded in N=1 superpotentials?  

E-Print Network (OSTI)

The question whether the integrable one-field cosmologies classified in a previous paper by Fre, Sagnotti and Sorin can be embedded as consistent one-field truncations into Extended Gauged Supergravity or in N=1 supergravity gauged by a superpotential without the use of D-terms is addressed in this paper. The answer is that such an embedding is very difficult and rare but not impossible. Indeed we were able to find two examples of integrable models embedded in Supergravity in this way. Both examples are fitted into N=1 Supergravity by means of a very specific and interesting choice of the superpotential W(z). The question whether there are examples of such an embedding in extended Gauged Supergravity remains open. In the present paper, relying on the embedding tensor formalism we classified all gaugings of the N=2 STU model, confirming, in the absence on hypermultiplets, the uniqueness of the stable de Sitter vacuum found several years ago by Fre, Trigiante and Van Proeyen and excluding the embedding of any integrable cosmological model. A detailed analysis of the space of exact solutions of the first Supergravity embedded integrable cosmological model revealed several new features worth an in depth consideration. When the scalar potential has an extremum at a negative value, the universe necessarily collapses into a Big Crunch notwithstanding its spatial flatness. The causal structure of these universes is quite different from that of the closed, positive curved, universe: indeed in this case the particle and event horizons do not coincide and develop complicated patterns. The cosmological consequences of this unexpected mechanism deserve careful consideration.

P. Fre; A. S. Sorin; M. Trigiante

2013-10-20T23:59:59.000Z

340

Diphoton and Z photon Decays of Higgs Boson in Gauge-Higgs Unification: A Snowmass white paper  

E-Print Network (OSTI)

In the context of gauge-Higgs unification scenario in a 5-dimensional flat spacetime, we investigate Higgs boson production via gluon fusion and its diphoton and Z gamma decay modes at the LHC. We show that the signal strength of the Higgs diphoton decay mode observed at ATLAS (and CMS), which is considerably larger than the Standard Model expectation, can be explained by a simple gauge-Higgs unification model with color-singlet bulk fermions to which a half-periodic boundary condition is assigned. The bulk fermions with mass at the TeV scale also play a crucial role in reproducing the observed Higgs boson mass of around 125 GeV. One naturally expects that the KK modes also contribute to the effective H-Z-gamma coupling. However, we show a very specific and general prediction of the gauge-Higgs unification scenario that KK-mode contributions to the H-Z-gamma coupling do not exist at the 1-loop level. If the excess of the Higgs to diphoton decay mode persists, its correlation with the Higgs to Z photon decay mode can be a clue to distinguish scenarios beyond the SM, providing a significant improvement of the sensitivity for the Higgs boson signals in the future.

Nobuhito Maru; Nobuchika Okada

2013-07-31T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Charged Higgs and Neutral Higgs pair production of weak gauge bosons fusion process in e+ e- collision  

E-Print Network (OSTI)

In this paper, we study the pair production and their decays of the Higges in the neutrinophilic Higgs two doublet model. The pair production occurs through W and Z gauge bosons fusion process. In the neutrinophilic model, the vacuum expectation value (VEV) of the second Higgs doublet is small and is proportional to the neutrino mass. The smallness of VEV is associated with the approximate global U(1) symmetry which is slightly broken. Therefore, there is a suppression factor for the U(1) charge breaking process. The second Higgs doublet has U(1) charge and its single production from the gauge boson fusion violates the U(1) charge conservation and is suppressed strongly to occur. In contrast to the single production, the pair production of the Higgses conserves U(1) charge and the approximate symmetry does not forbid it. To search for the pair productions in collider experiment,we study the production cross section of a pair of the charged Higgs and neutral Higgs bosons in e+ e- collision with center of energy from 600 (GeV) to 2000 (GeV). The total cross section varies from 10^{-4}(fb) to 10^{-3}(fb) for degenerate (200 GeV) charged and neutral Higgses mass case. The background process to the signal is gauge bosons pair W + Z production and their decays. We show the signal over background ratio is about 2% ~ 3% by combining the cross section ratio with ratios of branching fractions.

Takuya Morozumi; Kotaro Tamai

2013-06-07T23:59:59.000Z

342

Assessing Satellite-Based Rainfall Estimates in Semiarid Watersheds Using the USDA-ARS Walnut Gulch Gauge Network and TRMM PR  

Science Conference Proceedings (OSTI)

The rain gauge network associated with the Walnut Gulch Experimental Watershed (WGEW) in southeastern Arizona provides a unique opportunity for direct comparisons of in situ measurements and satellite-based instantaneous rain rate estimates like ...

Eyal Amitai; Carl L. Unkrich; David C. Goodrich; Emad Habib; Bryson Thill

2012-10-01T23:59:59.000Z

343

Rainfall Estimation with an Operational Polarimetric C-Band Radar in the United Kingdom: Comparison with a Gauge Network and Error Analysis  

Science Conference Proceedings (OSTI)

The estimate of rainfall using data from an operational dual-polarized C-band radar in convective storms in southeast United Kingdom is compared against a network of gauges. Four different rainfall estimators are considered: reflectivity–rain-rate ...

V. N. Bringi; M. A. Rico-Ramirez; M. Thurai

2011-10-01T23:59:59.000Z

344

Rainfall Estimation in the Sahel. Part II: Evaluation of Rain Gauge Networks in the CILSS Countries and Objective Intercomparison of Rainfall Products  

Science Conference Proceedings (OSTI)

This study investigates the accuracy of various precipitation products for the Sahel. A first set of products is made of three ground-based precipitation estimates elaborated regionally from the gauge data collected by Centre Regional ...

Abdou Ali; Abou Amani; Arona Diedhiou; Thierry Lebel

2005-11-01T23:59:59.000Z

345

Difficulties with Correcting Radar Rainfall Estimates Based on Rain Gauge Data: A Case Study of Severe Weather in Montana on 16–17 June 2007  

Science Conference Proceedings (OSTI)

The principal source of information for operational flash flood monitoring and warning issuance is weather radar–based quantitative estimates of precipitation. Rain gauges are considered truth for the purposes of validating and calibrating real-...

Steven V. Vasiloff; Kenneth W. Howard; Jian Zhang

2009-10-01T23:59:59.000Z

346

Validation of TRMM and Other Rainfall Estimates with a High-Density Gauge Dataset for West Africa. Part II: Validation of TRMM Rainfall Products  

Science Conference Proceedings (OSTI)

Gauge data from a West African network of 920 stations are used to assess Tropical Rainfall Measuring Mission (TRMM) satellite and blended rainfall products for 1998. In this study, mean fields, scattergrams, and latitudinal transects for the ...

S. E. Nicholson; B. Some; J. McCollum; E. Nelkin; D. Klotter; Y. Berte; B. M. Diallo; I. Gaye; G. Kpabeba; O. Ndiaye; J. N. Noukpozounkou; M. M. Tanu; A. Thiam; A. A. Toure; A. K. Traore

2003-10-01T23:59:59.000Z

347

Green Functions For Wave Propagation on a 5D manifold and the Associated Gauge Fields Generated by a Uniformly Moving Point Source  

E-Print Network (OSTI)

Gauge fields associated with the manifestly covariant dynamics of particles in (3,1) spacetime are five-dimensional. We provide solutions of the classical 5D gauge field equations in both (4,1) and (3,2) flat spacetime metrics for the simple example of a uniformly moving point source. Green functions for the 5D field equations are obtained, which are consistent with the solutions for uniform motion obtained directly from the field equations with free asymptotic conditions.

I. Aharonovich; L. P. Horwitz

2006-03-30T23:59:59.000Z

348

UV-divergences of Wilson Loops for Gauge/Gravity Duality  

E-Print Network (OSTI)

We analyze the structure of the UV divergences of the Wilson loop for a general gauge/gravity duality. We find that, due to the presence of a nontrivial NSNS B-field and metric, new divergences that cannot be subtracted out by the conventional Legendre transform may arise. We also derive conditions on the B-field and the metric, which when satisfied, the leading UV divergence will become linear, and can be cancelled out by choosing the boundary condition of the string appropriately. Our results, together with the recent result of arXiv:0807.5127, where the effect of a nontrivial dilaton on the structure of UV divergences in Wilson loop is analysed, allow us to conclude that Legendre transform is at best capable of cancelling the linear UV divergences arising from the area of the worldsheet, but is incapable to handle the divergences associated with the dilaton or the B-field in general. We also solve the conditions for the cancellation of the leading linear divergences generally and find that many well-known supergravity backgrounds are of these kinds, including examples such as the Sakai-Sugimoto QCD model or N=1 duality with Sasaki-Einstein spaces. We also point out that Wilson loop in the Klebanov-Strassler background have a divergence associated with the B-field which cannot be cancelled away with the Legendre transform. Finally we end with some comments on the form of the Wilson loop operator in the ABJM superconformal Chern-Simons theory.

Chong-Sun Chu; Dimitrios Giataganas

2008-10-31T23:59:59.000Z

349

Covariant isolation from an Abelian gauge field of its nondynamical potential, which, when fed back, can transform into a "confining Yukawa"  

E-Print Network (OSTI)

For Abelian gauge theory a properly relativistic gauge is developed by supplementing the Lorentz condition with causal determination of the time component of the four-vector potential by retarded Coulomb transformation of the charge density. This causal Lorentz gauge agrees with the Coulomb gauge for static charge densities, but allows the four-vector potential to have a longitudinal component that is determined by the time derivative of the four-vector potential's time component. Just as in Coulomb gauge, the two transverse components of the four-vector potential are its sole dynamical part. The four-vector potential in this gauge covariantly separates into a dynamical transverse four-vector potential and a nondynamical timelike/longitudinal four-vector potential, where each of these two satisfies the Lorentz condition. In fact, analogous partition of the conserved four-current shows each to satisfy a Lorentz-condition Maxwell equation system with its own conserved four-current. Because of this complete separation, either of these four-vector potentials can be tinkered with without affecting its counterpart. Since it satisfies the Lorentz condition, the nondynamical four-vector potential times a constant with dimension of inverse length squared is itself a conserved four-current, and so can be fed back into its own source current, which transforms its time component into an extended Yukawa, with both exponentially decaying and exponentially growing components. The latter might be the mechanism of quark-gluon confinement: in non-Abelian color gauge theory the Yukawa mixture ratio ought to be tied to color, with palpable consequences for "colorful" hot quark-gluon plasmas.

Steven Kenneth Kauffmann

2010-05-06T23:59:59.000Z

350

No one-loop gauge anomalies for a Lorentz-violating quantum electrodynamics: Evaluation of the three-photon vertex  

E-Print Network (OSTI)

Identification of the diagrams that can lead to gauge anomalies in the (minimal) Lorentz- and $CPT$-violating extension of quantum electrodynamics reveals these are the electron self-energy and vertex correction (related to the Ward-Takahashi identity), the photon self-energy (related to the vacuum polarization tensor transversality), and the three-photon vertex diagrams. All but the latter were explicitly verified to be free of anomalies to first order in loop expansion. Here we provide this remaining evaluation and verify the absence of anomalies in this process.

Daniel H. T. Franco; André H. Gomes

2013-08-22T23:59:59.000Z

351

Bianchi Type-II String Cosmological Models in Normal Gauge for Lyra's Manifold with Constant Deceleration Parameter  

E-Print Network (OSTI)

The present study deals with a spatially homogeneous and anisotropic Bianchi-II cosmological models representing massive strings in normal gauge for Lyra's manifold by applying the variation law for generalized Hubble's parameter that yields a constant value of deceleration parameter. The variation law for Hubble's parameter generates two types of solutions for the average scale factor, one is of power-law type and other is of the exponential form. Using these two forms, Einstein's modified field equations are solved separately that correspond to expanding singular and non-singular models of the universe respectively. The energy-momentum tensor for such string as formulated by Letelier (1983) is used to construct massive string cosmological models for which we assume that the expansion ($\\theta$) in the model is proportional to the component $\\sigma^{1}_{~1}$ of the shear tensor $\\sigma^{j}_{i}$. This condition leads to $A = (BC)^{m}$, where A, B and C are the metric coefficients and m is proportionality constant. Our models are in accelerating phase which is consistent to the recent observations. It has been found that the displacement vector $\\beta$ behaves like cosmological term $\\Lambda$ in the normal gauge treatment and the solutions are consistent with recent observations of SNe Ia. It has been found that massive strings dominate in the decelerating universe whereas strings dominate in the accelerating universe. Some physical and geometric behaviour of these models are also discussed.

Shilpi Agarwal; R. K. Pandey; Anirudh Pradhan

2010-10-07T23:59:59.000Z

352

Nuclear forces from quenched and 2+1 flavor lattice QCD using the PACS-CS gauge configurations  

E-Print Network (OSTI)

Two of recent progress in lattice QCD approach to nuclear force are reported. (i) Tensor force from quenched lattice QCD: By truncating the derivative expansion of inter-nucleon potential to the strictly local terms, we obtain central force V_C(r) and tensor force V_T(r) separately from s-wave and d-wave components of Bethe-Salpeter wave function for two nucleon state with J^P=1^+. Numerical calculation is performed with quenched QCD on 32^4 lattice using the standard plaquette action at beta=5.7 with the standard Wilson quark action with kappa=0.1640, 0.1665, 0.1678. Preliminary results show that the depths of the resulting tensor force amount to 20 to 40 MeV, which is enhanced in the light quark mass region. (ii) Nuclear force from 2+1 flavor QCD with PACS-CS gauge configuration: Preliminary full QCD results are obtained by using 2+1 flavor gauge configurations generated by PACS-CS collaboration. The resulting potential has the midium range attraction of about 30 MeV similar to the preceding quenched calculations. However, the repulsive core at short distance is significantly stronger than the corresponding quenched QCD result.

N. Ishii; S. Aoki; T. Hatsuda; for PACS-CS Collaboration

2009-03-31T23:59:59.000Z

353

I PHAEi:'I:. REM E :ACTO N  

Office of Legacy Management (LM)

consists of three main areas: I* ARC proper (the main research facility); the former Biomass Research Facility which consists of approximately 0.8-ha (2-acre), located south of...

354

DOE Radiation Exposure Monitoring System (REMS) Data Update  

SciTech Connect

This slide show presents the 2011 draft data for DOE occupational radiation exposure.Clarification is given on Reporting Data regarding: reporting Total Organ Dose (TOD); reporting Total Skin Dose (TSD), and Total Extremity Dose (TExD) ; and Special individuals reporting.

Rao, Nimi; Hagemeyer, Derek

2012-05-05T23:59:59.000Z

355

Admission REQUiREmEnTsnsC PROGRAMME MINIMUM ADMISSION  

E-Print Network (OSTI)

ACCEPTANCE LEVEL SELECTION PROCEDURES HEALTH SCIENCES · Bachelor of Medicine and Bach- elor of Surgery - MB BCh (6 years) · Bachelor of Pharmacy ­ BPharm (4 years) · Bachelor of Dental Science ­ BDS (5 years) · Bachelor of Science in Physio- therapy ­ BSc(Physiotherapy) (4 years) · Bachelor of Health Sciences (Bio

Wagner, Stephan

356

Building Energy Software Tools Directory: REM/Rate  

NLE Websites -- All DOE Office Websites (Extended Search)

utility DSM compliance analysis, and U.S. EPA Energy Star Home analysis. REMRate operates in Windows and has many unique features, including a simplified input...

357

Semidirect product gauge group [SU(3){sub c}xSU(2){sub L}]xU(1){sub Y} and quantization of hypercharge  

Science Conference Proceedings (OSTI)

In the standard model the hypercharges of quarks and leptons are not determined by the gauge group SU(3){sub c}xSU(2){sub L}xU(1){sub Y} alone. We show that, if we choose the semidirect product group [SU(3){sub c}xSU(2){sub L}]xU(1){sub Y} as its gauge group, the hyperchages are settled to be n/6 mod Z(n=0,1,3,4). In addition, the conditions for gauge-anomaly cancellation give strong constraints. As a result, the ratios of the hypercharges are uniquely determined and the gravitational anomaly is automatically canceled. The standard charge assignment to quarks and leptons can be properly reproduced. For exotic matter fields their hypercharges are also discussed.

Hattori, Chuichiro [Science Division, General Education, Aichi Institute of Technology, Toyota 470-0392 (Japan); Matsunaga, Mamoru; Matsuoka, Takeo [Department of Physics Engineering, Mie University, Tsu 514-8507 (Japan)

2011-01-01T23:59:59.000Z

358

The SU(3)/Z_3 QCD(adj) deconfinement transition via the gauge theory/"affine" XY-model duality  

E-Print Network (OSTI)

Earlier, two of us and M. Unsal [arXiv:1112.6389] showed that some 4d gauge theories, compactified on a small spatial circle of size L and considered at temperatures 1/beta near deconfinement, are dual to 2d "affine" XY-spin models. We use the duality to study deconfinement in SU(3)/Z_3 theories with n_f>1 massless adjoint Weyl fermions, QCD(adj) on R^2 x S^1_beta x S^1_L. The"affine" XY-model describes two "spins" - compact scalars taking values in the SU(3) root lattice, with nearest-neighbor interactions and subject to an "external field" preserving the topological Z_3^t and a discrete Z_3^chi subgroup of the chiral symmetry of the 4d gauge theory. The equivalent Coulomb gas representation of the theory exhibits electric-magnetic duality, which is also a high-/low-temperature duality. A renormalization group analysis suggests - but is not convincing, due to the onset of strong coupling - that the self-dual point is a fixed point, implying a continuous deconfinement transition. Here, we study the nature of the transition via Monte Carlo simulations. The Z_3^t x Z_3^chi order parameter, its susceptibility, the vortex density, the energy per spin, and the specific heat are measured over a range of volumes, temperatures, and "external field" strengths (in the gauge theory, these correspond to magnetic bion fugacities). The finite-size scaling of the susceptibility and specific heat we find is characteristic of a first-order transition. Furthermore, for sufficiently large but still smaller than unity bion fugacity (as can be achieved upon an increase of the S^1_L size), at the critical temperature we find two distinct peaks of the energy probability distribution, indicative of a first-order transition, as has been seen in earlier simulations of the full 4d QCD(adj) theory. We end with discussions of the global phase diagram in the beta-L plane for different numbers of flavors.

Mohamed M. Anber; Scott Collier; Erich Poppitz

2012-11-12T23:59:59.000Z

359

Validation of TRMM and Other Rainfall Estimates with a High-Density Gauge Dataset for West Africa. Part I: Validation of GPCC Rainfall Product and Pre-TRMM Satellite and Blended Products  

Science Conference Proceedings (OSTI)

Gauge data over North Africa are used to provide an assessment of satellite and blended rainfall products for 1988–94 and for 1998. A comparison is also made with the Global Precipitation Climatology Center (GPCC) gauge dataset. For the 1988–94 ...

S. E. Nicholson; B. Some; J. McCollum; E. Nelkin; D. Klotter; Y. Berte; B. M. Diallo; I. Gaye; G. Kpabeba; O. Ndiaye; J. N. Noukpozounkou; M. M. Tanu; A. Thiam; A. A. Toure; A. K. Traore

2003-10-01T23:59:59.000Z

360

Building Technologies Program: Tax Deduction Qualified Software -EnergyGauge Summit version 3.1 build 2  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

build 2 build 2 On this page you'll find information about the EnergyGauge Summit version 3.1 build 2 qualified computer software (www.buildings.energy.gov/qualified_software.html), which calculates energy and power cost savings that meet federal tax incentive requirements for commercial buildings (www.buildings.energy.gov/commercial/). Date Documentation Received by DOE: 31 January 2007 Statements in quotes are from the software developer. Internal Revenue Code §179D (c)(1) and (d) Regulations Notice 2006-52, Section 6 requirements (1) The name, address, and (if applicable) web site of the software developer; Florida Solar Energy Center 1679 Clearlake Road Cocoa, Florida 39922 www.energygauge.com (2) The name, email address, and telephone number of the person to contact for further

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Finite-size scaling tests for spectra in SU(3) lattice gauge theory coupled to 12 fundamental flavor fermions  

E-Print Network (OSTI)

I carry out a finite-size scaling study of the correlation length in SU(3) lattice gauge theory coupled to 12 fundamental flavor fermions, using recent data published by Fodor, Holland, Kuti, Nogradi and Schroeder. I make the assumption that the system is conformal in the zero-mass, infinite volume limit, that scaling is violated by both nonzero fermion mass and by finite volume, and that the scaling function in each channel is determined self-consistently by the data. From several different observables I extract a common exponent for the scaling of the correlation length xi with the fermion mass m_q, xi proportional to m_q to the power -1/y_m, with y_m ~ 1.35. Shortcomings of the analysis are discussed.

Thomas DeGrand

2011-09-06T23:59:59.000Z

362

Massive neutral gauge boson production as a probe of nuclear modifications of parton distributions at the LHC  

E-Print Network (OSTI)

We analyze the role of nuclear modifications of parton distributions, notably, the nuclear shadowing and antishadowing corrections, in production of lepton pairs from decays of neutral electroweak gauge bosons in proton-lead and lead-collisions at the LHC. Using the Collins-Soper-Sterman resummation formalism that we extended to the case of nuclear parton distributions, we observed a direct correlation between the predicted behavior of the transverse momentum and rapidity distributions of the produced vector bosons and the pattern of quark and gluon nuclear modifications. This makes Drell-Yan pair production in $pA$ and $AA$ collisions at the LHC a useful tool for constraining nuclear PDFs in the small-$x$ shadowing and moderate-$x$ antishadowing regions.

Vadim Guzey; Marco Guzzi; Pavel M. Nadolsky; Mark Strikman; Bowen Wang

2012-12-21T23:59:59.000Z

363

Determining the conformal window: SU(2) gauge theory with N_f = 4, 6 and 10 fermion flavours  

E-Print Network (OSTI)

We study the evolution of the coupling in SU(2) gauge field theory with $N_f=4$, 6 and 10 fundamental fermion flavours on the lattice. These values are chosen close to the expected edges of the conformal window, where the theory possesses an infrared fixed point. We use improved Wilson-clover action, and measure the coupling in the Schr\\"odinger functional scheme. At four flavours we observe that the couping grows towards the infrared, implying QCD-like behaviour, whereas at ten flavours the results are compatible with a Banks-Zaks type infrared fixed point. The six flavour case remains inconclusive: the evolution of the coupling is seen to become slower at the infrared, but the accuracy of the results falls short from fully resolving the fate of the coupling. We also measure the mass anomalous dimension for the $N_f=6$ case.

Tuomas Karavirta; Jarno Rantaharju; Kari Rummukainen; Kimmo Tuominen

2011-11-17T23:59:59.000Z

364

Weak-coupling analysis of the single-site large-N gauge theory coupled to adjoint fermions  

E-Print Network (OSTI)

We consider the leading-order expression at weak-coupling for a single-site large-N gauge theory coupled to adjoint fermions. We study the case of overlap and wilson fermions. We extend the theory to real values of the number of fermion flavors and restrict ourselves to asymptotically free theories. Using a four-dimensional density function for the distribution of the eigenvalues of the link variables, we show that it is possible to recover the infinite-volume continuum limit for a certain range of fermion flavors if we use fermions with a bare mass of zero. Our use of the four-dimensional density function is supported by a direct analysis of the lattice action.

Robert Lohmayer; Rajamani Narayanan

2013-05-06T23:59:59.000Z

365

Localizing modes of massive fermions and a U(1) gauge field in the inflating baby-skyrmion branes  

E-Print Network (OSTI)

We consider the six dimensional brane world model, where the brane is described by a localized solution to the baby-Skyrme model extending in the extradimensions. The branes have a cosmological constant modeled by inflating four dimensional slices and we further consider a bulk cosmological constant. We focus on the topological number three solutions and discuss the localization mechanism of the fermions on the above 3-branes. We discuss interpretation of the model in term of quark third generation mass and in terms of the inflation history. We argue that it is possible to track the phases of inflation in our model by suitably choosing the parameters. We further discuss the localization properties of gauge fields on the brane and argue that this is achieved only for specific values of the electromagnetic coupling, providing a quantization to the electric charge.

Térence Delsate; Nobuyuki Sawado

2011-12-12T23:59:59.000Z

366

The pair production of Charged and Neutral Higgs bosons in W and Z gauge boson fusion process  

E-Print Network (OSTI)

We study the signatures of a two Higgs doublet model of Davidson and Logan. The model includes an extra Higgs doublet with the vacuum expectation value (VEV) much smaller than the one of the standard model like Higgs. The smaller VEV is related to the origin of the small neutrino mass in the two Higgs doublet model. In the model, a single non-standard model like Higgs production of weak gauge boson fusion is suppressed due to the smallness of the vacuum expectation value. In contrast to the single Higgs production, the cross section of the Higgs pair production due to gauge boson fusion is not suppressed. Using the model, we compute the charged Higgs and neutral Higgs pair production cross section in W Z annihilation channel. In the two Higgs doublet model, the charged Higgs H^+ decays into a pair of the charged anti-lepton and right-handed neutrino. The neutral Higgs boson decays into right-handed neutrino and left-handed anti-neutrino pair which is invisible. A single charged anti-lepton and three neutrinos are the products of the subsequent decays of the charged Higgs and the neutral Higgs. W Z pair production gives the background for the signal through the decays W^+ ->nu l^+ and Z -> nu nubar. By multiplying the charged and neutral Higgses production cross section with the lepton flavor specific decay branching fractions of charged Higgs, we define a measurement which characterizes the present model. We numerically compute the measurement and find the sizable deviation from the standard model prediction.

Takuya Morozumi; Kotaro Tamai

2012-12-10T23:59:59.000Z

367

Intermediate left-right gauge symmetry, unification of couplings and fermion masses in SUSY $SO(10)\\times S_4$  

E-Print Network (OSTI)

If left-right gauge theory occurs as an intermediate symmetry in a GUT then, apart from other advantages, it is possible to obtain the see-saw scale necessary to understand small neutrino masses with Majorana coupling of order unity. Barring threshold or non-renormalizable gravitational effects, or assumed presence of additional light scalar particles of unprescribed origin, all other attempts to achieve manifest one-loop gauge coupling unification in SUSY SO(10) with left-right intermediate symmetry have not been successful so far. Attributing this failure to lack of flavor symmetry in the GUT, we show how the spontaneous symmetry breaking of $SO(10)\\times S_4$ leads to such intermediate scale extending over a wide range, $M_R \\simeq 5\\times 10^{9}$ GeV to $10^{15}$ GeV. All the charged fermion masses are fitted at the see-saw scale, $M_N\\simeq M_R \\simeq 4 \\times 10^{13}$ GeV which is obtained with Majorana coupling $f_0 \\simeq 1$. Using a constrained parametrization in which CP-violation originates only from quark sector, besides other predictions made in the neutrino sector, the reactor mixing angle is found to be $\\theta_{13} \\simeq 3^{\\circ} - 5^{\\circ}$ which is in the range accessible to ongoing and planned experiments. The leptonic Dirac phase turns out to be $\\delta \\sim 2.9- 3.1$ radians with Jarlskog invariant $J \\sim 2.95 \\times 10^{-5} - 10^{-3}$.

M. K. Parida

2008-04-29T23:59:59.000Z

368

Discriminating between Z Prime -boson effects and effects of anomalous gauge couplings in the double production of W{sup {+-}} bosons at a linear collider  

Science Conference Proceedings (OSTI)

The potential of the International Linear electron-positron Collider (ILC) for seeking, in the annihilation production of W{sup {+-}}-boson pairs, signals induced by new neutral gauge bosons predicted by models belonging to various classes and featuring an extended gauge sector is studied. Limits that will be obtained at ILC for the parameters and masses of Z Prime bosons are compared with present-day and future data from the Large Hadron Collider (LHC). The possibility of discriminating between the effects of Z-Z Prime mixing and signals induced by anomalous gauge couplings (AGC) is demonstrated within theoretically motivated trilinear gauge models involving several free anomalous parameters. It is found that the sensitivity of ILC to the effects of Z-Z Prime mixing in the process e{sup +}e{sup -} {yields} W{sup +}W{sup -} and its ability to discriminate between these two new-physics scenarios, Z Prime and AGC, become substantially higher upon employing polarized initial (e{sup +}e{sup -}) and final (W{sup {+-}}) states.

Andreev, Vasili V., E-mail: quarks@gsu.by [Francisk Skorina Gomel State University (Belarus); Pankov, A. A., E-mail: pankov@ictp.it [Abdus Salam ICTP International Centre for Theoretical Physics (Italy)

2013-06-15T23:59:59.000Z

369

Neutron formation temperature gauge and neutron activation analysis brine flow meter. Final report, October 1, 1976--March 31, 1978  

DOE Green Energy (OSTI)

Feasibility studies of nuclear techniques applicable to the determination of geothermal formation temperature and two-phase brine flow downhole have been performed. The formation temperature gauging technique involves injection of fast neutrons into the formation and analysis of the moderated slow neutron energy distribution by appropriately filtered neutron detectors. The scientific feasibility of the method has been demonstrated by analytical computational and experimental evaluation of the system response. A data analysis method has been developed to determine unambiguously the temperature, neutron absorption cross section and neutron moderating power of an arbitrary medium. The initial phase of a program to demonstrate the engineering feasibility of the technique has been performed. A sonde mockup was fabricated and measurements have been performed in a test stand designed to simulate a geothermal well. The results indicate that the formation temperature determined by this method is independent of differences between the temperature in the borehole fluid and the formation, borehole fluid density, and borehole fluid salinity. Estimates of performance specifications for a formation temperature sonde have been made on the basis of information obtained in this study and a conceptual design of a logging system has been developed. The technique for the determination of fluid flow in a well is based on neutron activation analysis of elements present in the brine. An analytical evaluation of the method has been performed. The results warrant further, experimental evaluation.

Vagelatos, N.; Steinman, D.K.; John, J.

1978-03-31T23:59:59.000Z

370

Lattice gauge theories - Springer  

Science Conference Proceedings (OSTI)

The Higgs fields as well as the spinor fields "live" on the sites of the lat- ..... diamagnetic behavior of bosons and the paramagnetism due to the spin, hence the ...

371

THERMOCOUPLE VACUUM GAUGE  

DOE Patents (OSTI)

A protector device is described for use in controlling the pressure within a cyclotron. In particular, an electrical circuit functions to actuate a vacuum pump when a predetermined low pressure is reached and disconnect the pump when the pressure increases abcve a certain value. The principal feature of the control circuit lies in the use of a voltage divider network at the input to a relay control tube comprising two parallel, adjustable resistances wherein one resistor is switched into the circuit when the relay connects the pump to a power source. With this arrangement the relay is energized at one input level received from a sensing element within the cyclotron chamber and is de-energized when a second input level, representing the higher pressure limit, is reached.

Price, G.W.

1954-08-01T23:59:59.000Z

372

The Gauge Block Handbook  

Science Conference Proceedings (OSTI)

... By the 1970's a number of wavelengths of stabilized ... was from Europe, and this supply was interrupted. ... matter, such as traces of oil, water vapor, or ...

2013-06-24T23:59:59.000Z

373

The Stefan-Boltzmann law in a small box and the pressure deficit in hot SU(N) lattice gauge theory  

E-Print Network (OSTI)

The blackbody radiation in a box L^3 with periodic boundary conditions in thermal equilibrium at a temperature T is affected by finite-size effects. These bring about modifications of the thermodynamic functions which can be expressed in a closed form in terms of the dimensionless parameter LT. For instance, when LT~4 - corresponding to the value where the most reliable SU(N) gauge lattice simulations have been performed above the deconfining temperature T_c - the deviation of the free energy density from its thermodynamic limit is about 5%. This may account for almost half of the pressure deficit observed in lattice simulations at T~ 4 T_c.

F. Gliozzi

2007-01-23T23:59:59.000Z

374

Potential and flux decomposition for dynamical systems and non-equilibrium thermodynamics: Curvature, gauge field, and generalized fluctuation-dissipation theorem  

SciTech Connect

The driving force of the dynamical system can be decomposed into the gradient of a potential landscape and curl flux (current). The fluctuation-dissipation theorem (FDT) is often applied to near equilibrium systems with detailed balance. The response due to a small perturbation can be expressed by a spontaneous fluctuation. For non-equilibrium systems, we derived a generalized FDT that the response function is composed of two parts: (1) a spontaneous correlation representing the relaxation which is present in the near equilibrium systems with detailed balance and (2) a correlation related to the persistence of the curl flux in steady state, which is also in part linked to a internal curvature of a gauge field. The generalized FDT is also related to the fluctuation theorem. In the equal time limit, the generalized FDT naturally leads to non-equilibrium thermodynamics where the entropy production rate can be decomposed into spontaneous relaxation driven by gradient force and house keeping contribution driven by the non-zero flux that sustains the non-equilibrium environment and breaks the detailed balance. On any particular path, the medium heat dissipation due to the non-zero curl flux is analogous to the Wilson lines of an Abelian gauge theory.

Feng Haidong [Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794 (United States); Wang Jin [Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794 (United States); Department of Physics and Astronomy, State University of New York at Stony Brook, Stony Brook, New York 11794 (United States) and Department of Applied Mathematics, State University of New York at Stony Brook, Stony Brook, New York 11794 (United States)

2011-12-21T23:59:59.000Z

375

Performance evaluation of interpolation methods for incorporating rain gauge measurements into NEXRAD precipitation data: A case study in the Upper Guadalupe River Basin  

Science Conference Proceedings (OSTI)

High spatial and temporal resolution of precipitation data is critical input for hydrological budget estimation and flash flood modeling. This study evaluated four methods (Bias Adjustment (BA), Simple Kriging with varying Local Means (SKlm), Kriging with External Drift (KED), and Regression Kriging (RK)) for their performances in incorporating gauge rainfall measurements into NEXRAD (Next Generation Weather Radar) Multisensor Precipitation Estimator (MPE) (hourly and 4 x 4 km{sup 2}). Measurements from a network of 50 gauges at the Upper Guadalupe River Basin, Central Texas and MPE data for the year 2004 were used in the study. We used three evaluation coefficients Percentage Bias (PB), Coefficient of Determination (R2), and Nash-Sutcliffe efficiency (NSE) to examine the performance of the four methods for preserving regional and local scale characteristics of observed precipitation data. The results show that the two Kriging-based methods (SKlm and RK) are in generally better than BA and KED and that the PB and NSE criteria are better than the R2 criterion in assessing the performance of the four methods. It is also worth noting that the performance of one method at regional scale may be different from its performance at local scale. Critical evaluation of the performance of different methods at local or regional scale should be conducted according to the different purposes. The results obtained in this study are expected to contribute to the development of more accurate spatial rainfall products for hydrologic budget and flash flood modeling.

Xie, Hongjie; Zhang, Xuesong; Yu, Beibei; Sharif, Hatim

2011-04-21T23:59:59.000Z

376

Gravity Probe B experiment cannot sense torsion of spacetime: on Poincar\\'e gauge theory of gravity and its equations of motion  

E-Print Network (OSTI)

Ever since E.Cartan in the 1920s enriched the geometric framework of general relativity (GR) by introducing a {\\it torsion} of spacetime, the question arose whether one could find a measurement technique for detecting the presence of a torsion field. Mao et al.(2007) claimed that the rotating quartz balls in the gyroscopes of the Gravity Probe B experiment, falling freely on an orbit around the Earth, should "feel" the torsion. Similarly, March et al.(2011) argue with the precession of the Moon and the Mercury and extend later their considerations to the Lageos satellite.--- A consistent theory of gravity with torsion emerged during the early 1960's as gauge theory of the Poincar\\'e group. This Poincar\\'e gauge theory of gravity incorporates as simplest viable cases the Einstein-Cartan(-Sciama-Kibble) theory (EC), the teleparallel equivalent GR|| of GR, and GR itself. So far, PG and, in particular, the existence of torsion have {\\it not} been experimentally confirmed. However, PG is to be considered as the st...

Hehl, Friedrich W; Puetzfeld, Dirk

2013-01-01T23:59:59.000Z

377

Pressure Measurements in a PBX 9501 Gauged Acceptor When Impacted by a Steel Plate that is Accelerated by a Thermally Cooked Off PBX 9501 Charge  

DOE Green Energy (OSTI)

Measuring the violence of a thermal explosion of a cased explosive is important for evaluating safety issues of explosive devices in fires. A sympathetic initiation scenario was studied here where a 9.0 cm diameter by 2.5 cm thick disc of PBX 9501 donor charge encased in a 304 stainless steel assembly was heated on top and bottom flat surfaces until it thermally exploded. The initial heating rate at the metal/explosive interface was 5 C per minute until it reaches 170 C; then this temperature is held for 35 minutes to allow temperature equilibration to within a few degrees throughout the explosive. The heating resumed at a rate of 1 C per minute until the PBX 9501 donor thermally exploded. A PBX 9501 acceptor charge with carbon resistor and manganin foil pressure gauges inserted at various depths was placed at a 10 cm standoff distance from the donor charge's top steel cover plate. Piezoelectric arrival time pins were placed in front of the acceptor surface to measure the velocity and shape of the impacting plate. The stainless steel cover plate of the donor charge had a nominal velocity of 0.55 {+-} 0.04 mm/{micro}s upon impact and was non-symmetrically warped. The impact of the tilted curved plate induced a three-dimensional compression wave into the acceptor. The rise times of the pressure waves were nominally 1.5 {micro}s with the closest carbon resistor gauges giving peak pressure of 10 kb that decayed to 3 kb for a wave run distance of 2.4 cm.

Forbes, J W; Garcia, F; Urtiew, P A; Vandersall, K S; Greenwood, D W; Tarver, C M

2002-03-11T23:59:59.000Z

378

MEASUREMENT OF Z + GAMMA PRODUCTION AND SEARCH FOR ANOMALOUS TRIPLE GAUGE COUPLINGS IN PROTON-ANTIPROTON COLLISIONS AT s**(1/2) = 1.96 TEV  

SciTech Connect

The author presents a measurement of p{bar p} {yields} Z{gamma} + X {yields} e{sup +}e{sup -}{gamma} + X production using proton-antiproton collisions data collected at the Collider Detector at Fermilab at a center of mass energy of 1.96 TeV. Z{gamma} production provides a direct test of the triple neutral gauge couplings. A measurement of Z{gamma} production cross section and search for anomalous ZZ{gamma} and Z{gamma}{gamma} couplings are presented. The data presented are from 1.1 fb{sup -1} of p{bar p} integrated luminosity collected at the CDF Detector. Electrons from Z decays are selected with E{sub t} > 20 Gev. Photons (E{sub t} > 7 GeV) are required to be well-separated from the electrons. There are 390 ee{gamma} candidate events found with 1.1 fb{sup -1} of data, compared to the SM prediction of 375.3 {+-} 25.2 events. The Standard Model prediction for the cross section for p{bar p} {yields} e{sup +}e{sup -}{gamma} + X production at {radical}s = 1.96 TeV is 4.5 {+-} 0.4 pb. The measured cross section is 4.7 {+-} 0.6 pb. The cross section and kinematic distributions of the ee{gamma} events are in good agreement with theoretical predictions. Limits on the ZZ{gamma} and Z{gamma}{gamma} couplings are extracted using the photon E{sub t} distribution of ee{gamma} events with m{sub ee{gamma}} > 100 GeV/c{sup 2}. These are the first limits measured using CDF Run II data. These limits provide important test of the interaction of the photon and the Z boson.

Deng, Jianrong; /Duke U.

2008-01-01T23:59:59.000Z

379

Shock initiation and detonation study on high concentration H2O2/H2O solutions using in-situ magnetic gauges  

SciTech Connect

Concentrated hydrogen peroxide (H{sub 2}O{sub 2}) has been known to detonate for many years. However, because of its reactivity and the difficulty in handling and confining it, along with the large critical diameter, few studies providing basic information about the initiation and detonation properties have been published. We are conducting a study to understand and quantify the initiation and detonation properties of highly concentrated H{sub 2}O{sub 2} using a gas-driven two-stage gun to produce well defined shock inputs. Multiple magnetic gauges are used to make in-situ measurements of the growth of reaction and subsequent detonation in the liquid. These experiments are designed to be one-dimensional to eliminate any difficulties that might be encountered with large critical diameters. Because of the concern of the reactivity of the H{sub 2}O{sub 2} with the confining materials, a remote loading system has been developed. The gun is pressurized, then the cell is filled and the experiment shot within less than three minutes. Several experiments have been completed on {approx}98 wt % H{sub 2}O{sub 2}/H{sub 2}O mixtures; homogeneous shock initiation behavior has been observed in the experiments where reaction is observed. The initial shock pressurizes and heats the mixture. After an induction time, a thermal explosion type reaction produces an evolving reactive wave that strengthens and eventually overdrives the first wave producing a detonation. From these experiments, we have determined unreacted Hugoniot points, times-to-detonation points that indicate low sensitivity (an input of 13.5 GPa produces detonation in 1 {micro}s compared to 9.5 GPa for neat nitromethane), and detonation velocities of high concentration H{sub 2}O{sub 2}/H{sub 2}O solutions of over 6.6 km/s.

Sheffield, Stephen A [Los Alamos National Laboratory; Dattelbaum, Dana M [Los Alamos National Laboratory; Stahl, David B [Los Alamos National Laboratory; Gibson, L Lee [Los Alamos National Laboratory; Bartram, Brian D [Los Alamos National Laboratory; Engelke, Ray [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

380

A neutron dose detector with REM response to 1 GeV  

Science Conference Proceedings (OSTI)

The limitation of current remmeters, which do not measure neutron dose equivalents above about 15 MeV, is a serious problem at high-energy accelerator facilities, where a much wider range of neutron energies exist. The purpose of this work was to measure the response of a modified Anderson-Braun (A-B) remmeter to neutron energies up to 1 GeV. The modifications to the standard A-B remmeter were based on the experimental results of Pb(n,xn) reactions.

Sun, R.K.; Krebs, G.F.; Smith, A.R. (Lawrence Berkeley Lab., CA (United States)); Hsu, H.H. (Los Alamos National Lab., NM (United States))

1992-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Uterine caliper and depth gauge  

DOE Patents (OSTI)

A uterine caliper and sound consisting of an elongated body having outwardly biased resilient caliper wings and a spring-loaded slidable cervical stop. A slide on the body is operatively connected to the wings by a monofilament and operates with respect to a first scale on the body as a width indicator. A rod extending longitudinally on the body is connected to the cervical stop and cooperates with a second scale on the body as a depth indicator. The instrument can be positioned to measure the distance from the outer cervical ostium to the fundus, as read on said second scale. The wings may be allowed to open by moving the slide, and when the wings engage the utero-tubal junctions, the width may be read on said first scale. By adjustment of the caliper wings the instrument may be retracted until the resistance of the inner ostium of the cervix is felt, enabling the length of the cervical canal to be read directly by the position of the longitudinal indicator rod with respect to said second scale. The instrument may be employed to measure the width of the uterine cavity at any position between the inner ostium of the cervix and the fundus.

King, Loyd L. (Benton City, WA); Wheeler, Robert G. (Richland, WA); Fish, Thomas M. (Kennewick, WA)

1977-01-01T23:59:59.000Z

382

A luminescent nanocrystal stress gauge  

SciTech Connect

Microscale mechanical forces can determine important outcomes ranging from the site of material fracture to stem cell fate. However, local stresses in a vast majority of systems cannot be measured due to the limitations of current techniques. In this work, we present the design and implementation of the CdSe/CdS core/shell tetrapod nanocrystal, a local stress sensor with bright luminescence readout. We calibrate the tetrapod luminescence response to stress, and use the luminescence signal to report the spatial distribution of local stresses in single polyester fibers under uniaxial strain. The bright stress-dependent emission of the tetrapod, its nanoscale size, and its colloidal nature provide a unique tool that may be incorporated into a variety of micromechanical systems including materials and biological samples to quantify local stresses with high spatial resolution.

Choi, Charina; Koski, Kristie; Olson, Andrew; Alivisatos, Paul

2010-10-25T23:59:59.000Z

383

A luminescent nanocrystal stress gauge  

E-Print Network (OSTI)

properties of compressed CdSe tetrapod nanocrystals. J.emission of single CdSe/CdS tetrapod heterostructures:A.C.K.O. synthesized the CdSe/CdS tetrapods with longer and

Choi, Charina

2011-01-01T23:59:59.000Z

384

RANGE INCREASER FOR PNEUMATIC GAUGES  

DOE Patents (OSTI)

An improved pneumatic gage is offered in which the linear range has been increased without excessive air consumption. This has been accomplished by providing an expansible antechamber connected to the nozzle of the gage so that the position of the nozzle with respect to the workpiece is varied automatically by variation in pressure within the antechamber. This arrangement ensures that the nozzle-to-workpiece clearance is maintained within certain limits, thus obtaining a linear relation of air flow to nozzle-to-workpiece clearance over a wider range.

Fowler, A.H.; Seaborn, G.B. Jr.

1960-09-27T23:59:59.000Z

385

Gauge Dynamics and Topological Insulators  

E-Print Network (OSTI)

A non-abelian magnetic field in Yang-Mills theory induces the formation of a "W-boson" vortex lattice. We study the propagation of fundamental fermions in the presence of this lattice in 2+1 dimensions. We show that the spectrum for massless fermions contains four topologically-protected Dirac points with non-zero Bloch momentum. For massive fermions, we compute topological invariants of the band structure and show that it is possible to realise a Z2 topological insulator within Yang-Mills theory.

Benjamin Béri; David Tong; Kenny Wong

2013-05-10T23:59:59.000Z

386

Gauge Blocks – A Zombie Technology  

Science Conference Proceedings (OSTI)

... 42, No. 2 (1993). [11] T. Doiron, D. McLaughlin, and A. Schneider, Use of Air Showers to Reduce Soaking Time for High Precision Dimensional ...

2010-03-10T23:59:59.000Z

387

Top Quark Produced Through the Electroweak Force: Discovery Using the Matrix Element Analysis and Search for Heavy Gauge Bosons Using Boosted Decision Trees  

Science Conference Proceedings (OSTI)

The top quark produced through the electroweak channel provides a direct measurement of the V{sub tb} element in the CKM matrix which can be viewed as a transition rate of a top quark to a bottom quark. This production channel of top quark is also sensitive to different theories beyond the Standard Model such as heavy charged gauged bosons termed W{prime}. This thesis measures the cross section of the electroweak produced top quark using a technique based on using the matrix elements of the processes under consideration. The technique is applied to 2.3 fb{sup -1} of data from the D0 detector. From a comparison of the matrix element discriminants between data and the signal and background model using Bayesian statistics, we measure the cross section of the top quark produced through the electroweak mechanism {sigma}(p{bar p} {yields} tb + X, tqb + X) = 4.30{sub -1.20}{sup +0.98} pb. The measured result corresponds to a 4.9{sigma} Gaussian-equivalent significance. By combining this analysis with other analyses based on the Bayesian Neural Network (BNN) and Boosted Decision Tree (BDT) method, the measured cross section is 3.94 {+-} 0.88 pb with a significance of 5.0{sigma}, resulting in the discovery of electroweak produced top quarks. Using this measured cross section and constraining |V{sub tb}| 0.78. Additionally, a search is made for the production of W{prime} using the same samples from the electroweak produced top quark. An analysis based on the BDT method is used to separate the signal from expected backgrounds. No significant excess is found and 95% C.L. upper limits on the production cross section are set for W{prime} with masses within 600-950 GeV. For four general models of W{prime} boson production using decay channel W{prime} {yields} t{bar b}, the lower mass limits are the following: M(W{prime}{sub L} with SM couplings) > 840 GeV; M(W{prime}{sub R}) > 880 GeV or 890 GeV if the right-handed neutrino is lighter or heavier than W{prime}{sub R}; and M(W{prime}{sub L+R}) > 915 GeV.

Pangilinan, Monica; /Brown U.

2010-02-01T23:59:59.000Z

388

Top Quark Produced Through the Electroweak Force: Discovery Using the Matrix Element Analysis and Search for Heavy Gauge Bosons Using Boosted Decision Trees  

SciTech Connect

The top quark produced through the electroweak channel provides a direct measurement of the V{sub tb} element in the CKM matrix which can be viewed as a transition rate of a top quark to a bottom quark. This production channel of top quark is also sensitive to different theories beyond the Standard Model such as heavy charged gauged bosons termed W{prime}. This thesis measures the cross section of the electroweak produced top quark using a technique based on using the matrix elements of the processes under consideration. The technique is applied to 2.3 fb{sup -1} of data from the D0 detector. From a comparison of the matrix element discriminants between data and the signal and background model using Bayesian statistics, we measure the cross section of the top quark produced through the electroweak mechanism {sigma}(p{bar p} {yields} tb + X, tqb + X) = 4.30{sub -1.20}{sup +0.98} pb. The measured result corresponds to a 4.9{sigma} Gaussian-equivalent significance. By combining this analysis with other analyses based on the Bayesian Neural Network (BNN) and Boosted Decision Tree (BDT) method, the measured cross section is 3.94 {+-} 0.88 pb with a significance of 5.0{sigma}, resulting in the discovery of electroweak produced top quarks. Using this measured cross section and constraining |V{sub tb}| < 1, the 95% confidence level (C.L.) lower limit is |V{sub tb}| > 0.78. Additionally, a search is made for the production of W{prime} using the same samples from the electroweak produced top quark. An analysis based on the BDT method is used to separate the signal from expected backgrounds. No significant excess is found and 95% C.L. upper limits on the production cross section are set for W{prime} with masses within 600-950 GeV. For four general models of W{prime} boson production using decay channel W{prime} {yields} t{bar b}, the lower mass limits are the following: M(W{prime}{sub L} with SM couplings) > 840 GeV; M(W{prime}{sub R}) > 880 GeV or 890 GeV if the right-handed neutrino is lighter or heavier than W{prime}{sub R}; and M(W{prime}{sub L+R}) > 915 GeV.

Pangilinan, Monica; /Brown U.

2010-02-01T23:59:59.000Z

389

High-loop perturbative renormalization constants for Lattice QCD (II): three-loop quark currents for tree-level Symanzik improved gauge action and n_f=2 Wilson fermions  

E-Print Network (OSTI)

Numerical Stochastic Perturbation Theory was able to get three- (and even four-) loop results for finite Lattice QCD renormalization constants. More recently, a conceptual and technical framework has been devised to tame finite size effects, which had been reported to be significant for (logarithmically) divergent renormalization constants. In this work we present three-loop results for fermion bilinears in the Lattice QCD regularization defined by tree-level Symanzik improved gauge action and n_f=2 Wilson fermions. We discuss both finite and divergent renormalization constants in the RI'-MOM scheme. Since renormalization conditions are defined in the chiral limit, our results also apply to Twisted Mass QCD, for which non-perturbative computations of the same quantities are available. We emphasize the importance of carefully accounting for both finite lattice space and finite volume effects. In our opinion the latter have in general not attracted the attention they would deserve.

Brambilla, Michele

2013-01-01T23:59:59.000Z

390

Can the matter-antimatter asymmetry be easier to understand within the "spin-charge-family-theory", predicting twice four families and two times $SU(2)$ vector gauge and scalar fields?  

E-Print Network (OSTI)

This contribution is an attempt to try to understand the matter-antimatter asymmetry in the universe within the {\\it spin-charge-family-theory} if assuming that transitions in non equilibrium processes among instanton vacua and complex phases in mixing matrices are the sources of the matter-antimatter asymmetry, as studied in the literature for several proposed theories. The {\\it spin-charge-family-theory} is, namely, very promising in showing the right way beyond the {\\it standard model}. It predicts families and their mass matrices, explaining the origin of the charges and of the gauge fields. It predicts that there are, after the universe passes through two $SU(2)\\times U(1)$ phase transitions, in which the symmetry breaks from $SO(1,3) \\times SU(2) \\times SU(2) \\times U(1) \\times SU(3)$ first to $SO(1,3) \\times SU(2) \\times U(1) \\times SU(3)$ and then to $SO(1,3) \\times U(1) \\times SU(3)$, twice decoupled four families. The upper four families gain masses in the first phase transition, while the second four families gain masses at the electroweak break. To these two breaks of symmetries the scalar non Abelian fields, the (superposition of the) gauge fields of the operators generating families, contribute. The lightest of the upper four families is stable (in comparison with the life of the universe) and is therefore a candidate for constituting the dark matter. The heaviest of the lower four families should be seen at the LHC or at somewhat higher energies.

N. S. Mankoc Borstnik

2010-11-26T23:59:59.000Z

391

Reply to `Comment on ``Helmholtz Theorem and the V-Gauge in the Problem of Superluminal and Instantaneous Signals in Classical Electrodynamics" by A. Chubykalo Et Al' by J. A. Heras [FOUND. Phys. Lett. vol. 19(6) p. 579 (2006)  

E-Print Network (OSTI)

This is the reply to `COMMENT ON ``HELMHOLTZ THEOREM AND THE V-GAUGE IN THE PROBLEM OF SUPERLUMINAL AND INSTANTANEOUS SIGNALS IN CLASSICAL ELECTRODYNAMICS" BY A. CHUBYKALO ET AL' BY J. A. HERAS [FOUND. PHYS. LETT. vol. 19(6) p. 579 (2006)

A. Chubykalo; A. Espinoza; R. Alvarado-Flores; A. Gutierrez Rodriguez

2007-06-08T23:59:59.000Z

392

Lattice Gauge Theories at the Energy Frontier  

E-Print Network (OSTI)

This White Paper has been prepared as a planning document for the Division of High Energy Physics of the U. S. Department of Energy. Recent progress in lattice-based studies of physics beyond the standard model is summarized, and major current goals of USQCD research in this area are presented. Challenges and opportunities associated with the recently discovered 126 GeV Higgs-like particle are highlighted. Computational resources needed for reaching important goals are described. The document was finalized on February 11, 2013 with references that are not aimed to be complete, or account for an accurate historical record of the field.

Thomas Appelquist; Richard Brower; Simon Catterall; George Fleming; Joel Giedt; Anna Hasenfratz; Julius Kuti; Ethan Neil; David Schaich

2013-09-04T23:59:59.000Z

393

Gauging the Needs of the Petroleum Industry  

Science Conference Proceedings (OSTI)

... Petroleum Institute (API) – a national trade association that represents all segments of America's technology-driven oil and natural gas industry 2 ...

2013-02-08T23:59:59.000Z

394

Two gauge boson physics at future colliders  

SciTech Connect

Electroweak unification suggests that there should be WW and ZZ physics analogous to {gamma}{gamma} physics. Indeed, WW and ZZ collisions will provide an opportunity to search for the Higgs boson at future high energy colliders. Cross sections in the picobarn range are predicted for Higgs boson production at the proposed 40-TeV SSC. While other states may be produced by WW and ZZ collisions, it is the Higgs boson that looms as the most attractive objective. 31 refs., 5 figs.

Cahn, R.N.

1988-05-13T23:59:59.000Z

395

Tales of the Venerable Honolulu Tide Gauge  

Science Conference Proceedings (OSTI)

Surface expressions of internal tides constitute a significant component of the total recorded tide. The internal component is strongly modulated by the time-variable density structure, and the resulting perturbation of the recorded tide gives a ...

John A. Colosi; Walter Munk

2006-06-01T23:59:59.000Z

396

OWR: Universal central extensions of gauge groups  

E-Print Network (OSTI)

We briefly indicate some implications of [1] for the second Lie algebra cohomology of equivariant map algebras and (twisted multi) loop algebras.

Bas Janssens

2010-12-29T23:59:59.000Z

397

Lattice Gauge Theory for Nuclear Physics  

Science Conference Proceedings (OSTI)

Quantum Chromodynamcs (QCD) is now established as the theory of strong interactions. A plethora of hadronic physics phenomena can be explained and described by QCD. From the early days of QCD, it was clear that low energy phenomena require a non-perturbative approach. Lattice QCD is a non-perturbative formulation of QCD that is particularly suited for numerical calculations. Today, supercomputers have achieved performance cabable of performing calculations that allow us to understand complex phenomana that arise from QCD. In this talk I will review the most recent results, relevant to nuclear physics. In particular, I will focus on results relevant to the structure and interactions of hadrons. Finally, I will comment on the opportunities opening up as we approach the era of exaflop computing.

Konstantinos Orginos

2012-12-01T23:59:59.000Z

398

A lattice gauge theory model for graphene  

E-Print Network (OSTI)

In this Ph.D. thesis a model for graphene in presence of quantized electromagnetic interactions is introduced. The zero and low temperature properties of the model are studied using rigorous renormalization group methods and lattice Ward identities. In particular, it is shown that, at all orders in renormalized perturbation theory, the Schwinger functions and the response functions decay with interaction dependent anomalous exponents. Regarding the 2-point Schwinger function, the wave function renormalization diverges in the infrared limit, while the effective Fermi velocity flows to the speed of light. Concerning the response functions, those associated to a Kekul\\'e distortion of the honeycomb lattice and to a charge density wave instability are enhanced by the electromagnetic electron-electron interactions (their scaling in real space is depressed), while the lowest order correction to the scaling exponent of the density-density response function is vanishing. Then, the model in presence of a fixed Kekul\\'e distortion is studied, and it is shown that the interaction strongly renormalizes the effective amplitude of the lattice distortion. Finally, the effect of the electronic repulsion on the Peierls-Kekul\\'e instability is discussed by deriving a non-BCS gap equation, from which we find evidence that strong electromagnetic interactions facilitate the spontaneous distortion of the lattice and the opening of a gap. This thesis is based on joint work with A. Giuliani and V. Mastropietro.

Marcello Porta

2011-05-06T23:59:59.000Z

399

Weyl-Gauge Symmetry of Graphene  

E-Print Network (OSTI)

The conformal invariance of the low energy limit theory governing the electronic properties of graphene is explored. In particular, it is noted that the massless Dirac theory in point enjoys local Weyl symmetry, a very large symmetry. Exploiting this symmetry in the two spatial dimensions and in the associated three dimensional spacetime, we find the geometric constraints that correspond to specific shapes of the graphene sheet for which the electronic density of states is the same as that for planar graphene, provided the measurements are made in accordance to the inner reference frame of the electronic system. These results rely on the (surprising) general relativistic-like behavior of the graphene system arising from the combination of its well known special relativistic-like behavior with the less explored Weyl symmetry. Mathematical structures, such as the Virasoro algebra and the Liouville equation, naturally arise in this three-dimensional context and can be related to specific profiles of the graphene sheet. Speculations on possible applications of three-dimensional gravity are also proposed.

Alfredo Iorio

2010-07-28T23:59:59.000Z

400

Geometric aspects of gauge and spacetime symmetries  

E-Print Network (OSTI)

Gravity 25 (2008), 165009. (2) Gary W. Gibbons and Steffen Gielen. Deformed General Relativity and Torsion. Classical and Quantum Gravity 26 (2009), 135005. (3) Gary W. Gibbons, Steffen Gielen, C. N. Pope, and Neil Turok. Measures on Mixing Angles... and Kaigorodov-Ozsva´th Solutions . . . . . . . . . . . . . 25 2.4 The Kaigorodov Solution and Lobatchevski Plane Gravitational Waves 42 2.5 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 3 Deformed General Relativity and Torsion 50...

Gielen, Steffen C. M.

2011-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Hall viscosity from gauge/gravity duality  

E-Print Network (OSTI)

In (2+1)-dimensional systems with broken parity, there exists yet another transport coefficient, appearing at the same order as the shear viscosity in the hydrodynamic derivative expansion. In condensed matter physics, it is referred to as "Hall viscosity". We consider a simple holographic realization of a (2+1)-dimensional isotropic fluid with broken spatial parity. Using techniques of fluid/gravity correspondence, we uncover that the holographic fluid possesses a nonzero Hall viscosity, whose value only depends on the near-horizon region of the background. We also write down a Kubo's formula for the Hall viscosity. We confirm our results by directly computing the Hall viscosity using the formula.

Omid Saremi; Dam Thanh Son

2011-03-24T23:59:59.000Z

402

DOE Radiation Exposure Monitoring System (REMS) Data Update Presented at the 32nd Annual International Dosimetry and Records Symposium, June 3-6, Scottsdale, AZ  

Science Conference Proceedings (OSTI)

This slide-show presents the 2012 draft data for DOE occupational radiation exposure, compares those data with last year and the last five years, and clarifies reporting data.

none,

2013-01-01T23:59:59.000Z

403

Low Dose Radiation Program: Links - Research Societies with Radiation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Societies with Radiation Concerns Academy of Radiology Research American Association of Physicists in Medicine American Nuclear Society American Roentgen Ray Society American...

404

Nobel Prize in Physics 1901  

NLE Websites -- All DOE Office Websites (Extended Search)

of the remarkable rays subsequently named after him" Wilhelm Conrad Roentgen Button Germany Button born 1845 (Lennep, Prussia), died 1923 Button CA - University of Munich,...

405

Gauging Improvements in Urban Building Energy Policy in India  

E-Print Network (OSTI)

the development of benchmark building energy use standards,to establish benchmarks for building energy use given usebuilding energy performance benchmarking tool called EcoBench. EcoBench uses an online interface to benchmark

Williams, Christopher

2013-01-01T23:59:59.000Z

406

Gauging the biological impacts of the greenhouse effect  

SciTech Connect

For years some climatologists have warned that greenhouse gases, by preventing excess solar energy from radiating back into space, could raise average global temperatures 3/degree/ to 5/degree/C within the next century, change rainfall patterns, melt some glaciers and polar ice, raise sea levels, flood low-lying coasts, and otherwise alter climate and environment. Only recently, however, have biologists begun to ask how the greenhouse effect might affect living organisms. How, for example, will individual species respond to changing climate. will they adapt to new conditions or migrate to new environs. Which species might benefit and which might go extinct. Will communities of plants and animals remain intact. What are the implications for wildlife managers and park planners. Such questions were addressed at a recent conference on biological consequences of the greenhouse effect.

Cohn, J.P.

1988-01-01T23:59:59.000Z

407

Exact solutions with noncommutative symmetries in Einstein and gauge gravity  

Science Conference Proceedings (OSTI)

We present new classes of exact solutions with noncommutative symmetries constructed in vacuum Einstein gravity (in general

Sergiu I. Vacaru

2005-01-01T23:59:59.000Z

408

Tests gauge LED sensors for fuel-dye measurements  

SciTech Connect

The goal of this work was to develop a low cost, robust sensor to allow direct measurement of Solvent Red 164 dye concentration in off-road fuel at refineries and fuel terminals. Optical absorption sensors based on light emitting diodes (LEDs) are rugged, low-cost, have low power consumption, and can be designed to be intrinsically safe.LED-based systems have been used in a variety of chemical detection applications including heavy metals, pH, CO2, and O2. The approach for this work was to develop a sensor that could be mounted on a pipeline sight glass, precluding the need for direct contact of the sensor with the fuel. Below is described the design and testing of three different LED/photodiode sensors utilizing reflectance spectrometry for the measurement of dye concentration.

Ozanich, Richard M.; Lucke, Richard B.; Melville, Angela M.; Wright, Bob W.

2009-10-19T23:59:59.000Z

409

Gauge/gravity duality and jets in strongly coupled plasma  

E-Print Network (OSTI)

We discuss jets in strongly coupled N = 4 supersymmetric Yang-Mills plasma and their dual gravitational description.

Chesler, Paul M

2009-01-01T23:59:59.000Z

410

Gauge/gravity duality and jets in strongly coupled plasma  

E-Print Network (OSTI)

We discuss jets in strongly coupled N = 4 supersymmetric Yang-Mills plasma and their dual gravitational description.

Paul M. Chesler

2009-07-26T23:59:59.000Z

411

Gauging Improvements in Urban Building Energy Policy in India  

E-Print Network (OSTI)

constructing a net zero-energy building to house the REECCountry Report on Building Energy Codes in India. Richland,2010. Mainstreaming Building Energy Efficiency Codes in

Williams, Christopher

2013-01-01T23:59:59.000Z

412

HIGGS PHASE IN NON-ABELIAN GAUGE THEORIES  

E-Print Network (OSTI)

June 1981 LBL-12840 HIGGS PHASE IN NON-ABELIAN GAUGEof this theory might be in a Higgs phase rather than theplasma of color for the Higgs phase. Since the latter has a

Kaymakcalan, O.S.

2010-01-01T23:59:59.000Z

413

On the Higgs mechanism and the gauge field theory  

E-Print Network (OSTI)

As laboratory experiments for the detection of particles with non-zero rest masses forming the dark matter do not give positive results we offer once more to turn the attention upon the neutrinos background of the Universe. If the neutrinos background has the temperature 2 K, then direct observations of particles are impossible ones and only their high density allows hope for the success indirect observations. In consequence of this the field theory is constructed as the maximum plausible reduction of the Feynman formulation of the quantum theory displaying experiment data adequately.

V. M. Koryukin

2008-01-04T23:59:59.000Z

414

Building Energy Software Tools Directory: EnergyGauge Summit...  

NLE Websites -- All DOE Office Websites (Extended Search)

and Renewable Energy EERE Home | Programs & Offices | Consumer Information Building Energy Software Tools Directory Search Search Help Building Energy Software Tools Directory...

415

Universal Central Extensions of Gauge Algebras and Groups  

E-Print Network (OSTI)

We show that the canonical central extension of the group of sections of a Lie group bundle over a compact manifold, constructed in [NW09], is universal. In doing so, we prove universality of the corresponding central extension of Lie algebras in a slightly more general setting.

Bas Janssens; Christoph Wockel

2010-10-18T23:59:59.000Z

416

Lorentz connection from a conformal gauge theory of Euclidean space  

E-Print Network (OSTI)

The quotient of the conformal group of Euclidean 4-space by its Weyl subgroup results in a geometry possessing many of the properties of relativistic phase space, including both a natural symplectic form and non-degenerate Killing metric. When we complete the identification with phase space by requiring the existence of orthogonal, canonically conjugate, metric submanifolds, we find that the induced metric and the spin connection are Lorentzian on the submanifolds, despite the Euclidean starting pont. By examining the structure equations of the biconformal space in an orthonormal frame adapted to its phase space properties, we also find that two new tensor fields emerge from this geometry. The first is a combination of the scale factor on the metric with the Weyl vector. The second comes from the components of the spin connection, symmetric with respect to the new metric. Though this field comes from the spin connection it transforms homogeneously.

Jeffrey S Hazboun; James T Wheeler

2013-05-29T23:59:59.000Z

417

Search for gauge symmetry generators of singular Lagrangian theory  

E-Print Network (OSTI)

We propose a procedure which allows one to construct local symmetry generators of general quadratic Lagrangian theory. Manifest recurrence relations for generators in terms of so-called structure matrices of the Dirac formalism are obtained. The procedure fulfilled in terms of initial variables of the theory, and do not implies either separation of constraints on first and second class subsets or any other choice of basis for constraints.

A. A. Deriglazov

2005-09-29T23:59:59.000Z

418

Influence of radiation damage on ruby as a pressure gauge  

SciTech Connect

This study tackles the question if ruby crystals, irradiated with energetic heavy ions, can still be used as reliable pressure sensors. The problem is linked to novel irradiation experiments, exposing pressurized samples to swift heavy-ion beams. In order to test and quantify a possible influence of radiation damage on the laser-induced fluorescence lines of ruby (Al{sub 2}O{sub 3}:Cr{sup 3+}), small crystals were exposed to different heavy ions (Xe, Au, and U) with kinetic energies of several giga-electron volt at ambient as well as high-pressure conditions. With increasing fluence (ions/cm{sup 2}), the R{sub 1} and R{sub 2} lines shift both to lower wavelengths which leads to an underestimation of the pressure. An empirical correction term {epsilon} is proposed to include the irradiation damage effect into the commonly employed ruby calibration scale.

Schuster, B. [Institut fuer Festkoerperphysik, Technische Universitaet Darmstadt, Hochschulstrasse 6, 64289 Darmstadt (Germany); GSI Helmholtzzentrum fuer Schwerionenforschung, Planckstr. 1, 64291 Darmstadt (Germany); Weikusat, C.; Miletich, R. [Universitaet Heidelberg, Im Neuenheimer Feld 234-236, 69120 Heidelberg (Germany); Trautmann, C.; Neumann, R. [GSI Helmholtzzentrum fuer Schwerionenforschung, Planckstr. 1, 64291 Darmstadt (Germany); Fujara, F. [Institut fuer Festkoerperphysik, Technische Universitaet Darmstadt, Hochschulstrasse 6, 64289 Darmstadt (Germany)

2010-11-01T23:59:59.000Z

419

FINAL REPORT DOSES TO THE PUBLIC  

E-Print Network (OSTI)

and thyroid--not to exceed 10 rems in 13 weeks or 30 rems per year. o Hands, forearms, feet, and ankles

420

Pressure and Vacuum Group Homepage  

Science Conference Proceedings (OSTI)

... piston gauges, liquid-column manometers, capacitance diaphragm gauges, spinning rotor gauges, ionization gauges, and calibrated gas leaks ...

2013-06-12T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Assessing Potential Exposure from Truck Transport of Low-level Radioactive Waste to the Nevada Test Site  

SciTech Connect

This study has shown that, based upon measurements from industry standard radiation detection instruments, such as the RS model RSS-131 PICs in a controlled configuration, a person may be exposed to gamma radiation above background when in close proximity to some LLW trucks. However, in approximately half (47.7 percent) the population of trucks measured in this study, a person would receive no exposure above background at a distance of 1.0 m (3.3 ft) away from a LLW truck. An additional 206 trucks had net exposures greater than zero, but equal to or less than 1 {micro}R/h. Finally, nearly 80 percent of the population of trucks (802 of 1,012) had net exposures less than or equal to 10 {micro}R/h. Although there are no shipping or exposure standards at 1.0 m (3.3 ft) distance, one relevant point of comparison is the DOT shipping standard of 10 mrem/h at 2.0 m (6.6 ft) distance. Assuming a one-to-one correspondence between Roentgens and Rems, then 903 trucks (89.2 percent of the trucks measured) were no greater than one percent of the DOT standard at 1.0 m (3.3 ft). Had the distance at which the trucks been measured increased to 2.0 m (6.6 ft), the net exposure would be even less because of the increase in distance between the truck and the receptor. However, based on the empirical data from this study, the rate of decrease may be slower than for either a point or line source as was done for previous studies (Gertz, 2001; Davis et al., 2001). The highest net exposure value at 1.0 m (3.3 ft) distance, 11.9 mR/h, came from the only truck with a value greater than 10 mR/h at 1.0 m (3.3 ft) distance.

J. Miller; D. Shafer; K. Gray; B. Church; S.Campbell; B. Holz

2005-08-15T23:59:59.000Z

422

Low Dose Radiation Research Program: 2011 Calendar of Upcoming...  

NLE Websites -- All DOE Office Websites (Extended Search)

Ann. Mtg. of the American Roentgen Ray Society, Chicago, IL, USA. May 9-11, 2011 Low Dose Radiation Research Investigators' Workshop, Bethesda, MD, USA. May 16-20, 2011...

423

DOE 2012 Occupational Radiation Exposure October 2013  

SciTech Connect

The U.S. Department of Energy (DOE) Office of Analysis within the Office of Health, Safety and Security (HSS) publishes the annual DOE Occupational Radiation Exposure Report to provide an overview of the status of radiation protection practices at DOE (including the National Nuclear Security Administration [NNSA]). The DOE 2012 Occupational Radiation Exposure Report provides an evaluation of DOE-wide performance regarding compliance with Title 10, Code of Federal Regulations (C.F.R.), Part 835, Occupational Radiation Protection dose limits and as low as reasonably achievable (ALARA) process requirements. In addition, the report provides data to DOE organizations responsible for developing policies for protection of individuals from the adverse health effects of radiation. The report provides a summary and an analysis of occupational radiation exposure information from the monitoring of individuals involved in DOE activities. Over the past 5-year period, the occupational radiation exposure information is analyzed in terms of aggregate data, dose to individuals, and dose by site. As an indicator of the overall amount of radiation dose received during the conduct of operations at DOE, the report includes information on collective total effective dose (TED). The TED is comprised of the effective dose (ED) from external sources, which includes neutron and photon radiation, and the internal committed effective dose (CED), which results from the intake of radioactive material into the body. The collective ED from photon exposure decreased by 23% between 2011 and 2012, while the neutron dose increased by 5%. The internal dose components of the collective TED decreased by 7%. Over the past 5-year period, 99.99% of the individuals receiving measurable TED have received doses below the 2 roentgen equivalent in man (rems) (20 millisievert [mSv]) TED administrative control level (ACL), which is well below the DOE regulatory limit of 5 rems (50 mSv) TED annually. The occupational radiation exposure records show that in 2012, DOE facilities continued to comply with DOE dose limits and ACLs and worked to minimize exposure to individuals. The DOE collective TED decreased 17.1% from 2011 to 2012. The collective TED decreased at three of the five sites with the largest collective TED. u Idaho Site – Collective dose reductions were achieved as a result of continuing improvements at the Advanced Mixed Waste Treatment Project (AMWTP) through the planning of drum movements that reduced the number of times a container is handled; placement of waste containers that created highradiation areas in a centralized location; and increased worker awareness of high-dose rate areas. In addition, Idaho had the largest decrease in the total number of workers with measurable TED (1,143 fewer workers). u Hanford Site (Hanford) – An overall reduction of decontamination and decommissioning (D&D) activities at the Plutonium Finishing Plant (PFP) and Transuranic (TRU) retrieval activities resulted in collective dose reductions. u Savannah River Site (SRS) – Reductions were achieved through ALARA initiatives employed site wide. The Solid Waste Management Facility used extended specialty tools, cameras and lead shield walls to facilitate removal of drums. These tools and techniques reduce exposure time through improved efficiency, increase distance from the source of radiation by remote monitoring, shield the workers to lower the dose rate, and reduce the potential for contamination and release of material through repacking of waste. Overall, from 2011 to 2012, there was a 19% decrease in the number of workers with measurable dose. Furthermore, due to a slight decrease in both the DOE workforce (7%) and monitored workers (10%), the ratio of workers with measurable doses to monitored workers decreased to 13%. Another primary indicator of the level of radiation exposure covered in this report is the average measurable dose, which normalizes the collective dose over the population of workers who actually received a measurable dose. The average measurable TED in

none,

2012-02-02T23:59:59.000Z

424

Validating the validation: the influence of liquid water distribution in clouds on the intercomparison  

E-Print Network (OSTI)

of stellite radiance wavenumber spectra. Rem. Sens. Environ., 42, 51 ­ 64. Brenguier, J.-L., H. Pawlowska, L

Stoffelen, Ad

425

QCD and Electroweak Interference in Higgs production by Gauge Boson Fusion  

E-Print Network (OSTI)

We explicitly calculate the contribution to Higgs production at the LHC from the interference between gluon-gluon and Weak Vector Boson fusion, and compare it to the pure QCD and pure Electro-weak result. While the effect is small at tree level, we speculate it will be significantly enhanced by loop effects.

Jeppe R. Andersen; Jennifer M. Smillie

2006-11-21T23:59:59.000Z

426

PROCESSING AND INTERPRETATION OF PRESSURE TRANSIENT DATA FROM PERMANENT DOWNHOLE GAUGES  

E-Print Network (OSTI)

reservoir pa- rameters, monitor reservoir conditions, develop recovery schemes, and forecast future well) to monitor the well performance in real time. This continuous monitoring enables engineers to observe ongoing complexities, since the pressure data are not mea- sured under well-designed conditions as in the conventional

427

Conformal Window of Gauge Theories with Four-Fermion Interactions and Ideal Walking  

E-Print Network (OSTI)

We investigate the effects of four-fermion interactions on the phase diagram of strongly interacting theories for any representation as function of the number of colors and flavors. We show that the conformal window, for any representation, shrinks with respect to the case in which the four-fermion interactions are neglected. The anomalous dimension of the mass increases beyond the unity value at the lower boundary of the new conformal window. We plot the new phase diagram which can be used, together with the information about the anomalous dimension, to propose ideal models of walking technicolor. We discover that when the extended technicolor sector, responsible for giving masses to the standard model fermions, is sufficiently strongly coupled the technicolor theory, in isolation, must have an infrared fixed point for the full model to be phenomenologically viable. Using the new phase diagram we show that the simplest one family and minimal walking technicolor models are the archetypes of models of dynamical electroweak symmetry breaking. Our predictions can be verified via first principle lattice simulations.

Hidenori S. Fukano; Francesco Sannino

2010-05-18T23:59:59.000Z

428

Radar and Rain Gauge Analysis of the Extreme Rainfall during Hurricane Danny’s (1997) Landfall  

Science Conference Proceedings (OSTI)

As a minimal hurricane, Danny moved over Mobile Bay around 0900 UTC 19 July 1997 and became stationary by midmorning, while situated within a synoptic col. Danny then evolved into an asymmetric storm with an intensely convective rainband that ...

Jeffrey M. Medlin; Sytske K. Kimball; Keith G. Blackwell

2007-05-01T23:59:59.000Z

429

On the Estimation of Trends in Annual Rainfall Using Paired Gauge Observations  

Science Conference Proceedings (OSTI)

A method was recently proposed for evaluating the impact of a perturbation, such as air pollution or urbanization, on the precipitation at a location by calculating the ratio between the precipitation at the perturbed location and that at a ...

Nathan Paldor

2008-06-01T23:59:59.000Z

430

Signals of neutralinos and charginos from gauge boson fusion at the CERN Large Hadron Collider  

E-Print Network (OSTI)

We point out that interesting signals of the non-strongly interacting sector of the supersymmetric standard model arise from the production of charginos and neutralinos via vector boson fusion (VBF) at the Large Hadron Collider (LHC). In particular, if R-parity is violated, the hadronically quiet signals of charginos and neutralinos through direct production get considerably suppressed. We show that in such cases, the VBF channel can be useful in identifying this sector through clean and background-free final states.

Anindya Datta; Partha Konar; Biswarup Mukhopadhyaya

2001-09-09T23:59:59.000Z

431

Global Land Precipitation: A 50-yr Monthly Analysis Based on Gauge Observations  

Science Conference Proceedings (OSTI)

This paper describes the initial work toward the production of monthly global (land and ocean) analyses of precipitation for an extended period from 1948 to the present. Called the precipitation reconstruction (PREC), the global analyses are ...

Mingyue Chen; Pingping Xie; John E. Janowiak; Phillip A. Arkin

2002-06-01T23:59:59.000Z

432

Combining CMORPH and Rain Gauges Observations over the Rio Negro Basin  

Science Conference Proceedings (OSTI)

Several algorithms that combine daily precipitation surface data and satellite Climate Prediction Center Morphing Technique (CMORPH) estimations were implemented and tested for the Rio Negro basin in northeastern Uruguay. Bias removal of satellite ...

Alejandra De Vera; Rafael Terra

2012-12-01T23:59:59.000Z

433

Thermal D-branes States from Superstrings in Light-Cone Gauge  

E-Print Network (OSTI)

In this talk we are going to review a method to construct the thermal boundary states of the thermal string in the TFD approach. The class of thermal boundary states presented here is derived from the BPS D-branes of the type II GS superstrings.

Ion V. Vancea

2006-09-26T23:59:59.000Z

434

Hadronic form factor models and spectroscopy within the gauge/gravity correspondence  

SciTech Connect

We show that the nonperturbative light-front dynamics of relativistic hadronic bound states has a dual semiclassical gravity description on a higher dimensional warped AdS space in the limit of zero quark masses. This mapping of AdS gravity theory to the boundary quantum field theory, quantized at fixed light-front time, allows one to establish a precise relation between holographic wave functions in AdS space and the light-front wavefunctions describing the internal structure of hadrons. The resulting AdS/QCD model gives a remarkably good accounting of the spectrum, elastic and transition form factors of the light-quark hadrons in terms of one parameter, the QCD gap scale. The light-front holographic approach described here thus provides a frame-independent first approximation to the light-front Hamiltonian problem for QCD. This article is based on lectures at the Niccolo Cabeo International School of Hadronic Physics, Ferrara, Italy, May 2011.

de Teramond, Guy F.; /Costa Rica U.; Brodsky, Stanley J.; /SLAC

2012-03-20T23:59:59.000Z

435

More on Superconductors via Gauge/Gravity Duality with Nonlinear Maxwell Field  

E-Print Network (OSTI)

We have developed the recent investigations on the second-order phase transition in the holographic superconductor using the probe limit for a nonlinear Maxwell field strength coupled to a massless scalar field. By analytic methods, based on the variational Sturm- Liouville minimization technique, we study the effects of the space-time dimension and the non-linearity parameter on the critical temperature and the scalar condensation of the dual operators on the boundary. Further, as a motivated result, we analytically deduce the DC conductivity in the low and zero temperatures regime. Especially in the zero temperature limit and in two dimensional toy model, we thoroughly compute the conductivity analytically. Our work clarifies more features of the holographic superconductors both in different space dimensions and on the effect of the non-linearity in Maxwell's strength field.

Davood Momeni; Muhammad Raza; Ratbay Myrzakulov

2013-05-14T23:59:59.000Z

436

A Possible Higher Order Correction to the Vortical Conductivity in a Gauge Field Plasma  

E-Print Network (OSTI)

The two loop contributions to the chiral vortical conductivity are considered. The Kubo formula together with the anomalous Ward identity of the axial vector current suggest that there may be a nonzero correction to the coefficient of the $T^2$ term of the conductivity.

Hou, Defu; Ren, Hai-cang

2012-01-01T23:59:59.000Z

437

Universal properties of thermal and electrical conductivity of gauge theory plasmas from holography  

E-Print Network (OSTI)

We propose that for conformal field theories admitting gravity duals, the thermal conductivity is fixed by the central charges in a universal manner. Though we do not have a proof as yet, we have checked our proposal against several examples. This proposal, if correct, allows us to express electrical conductivity in terms of thermodynamical quantities even in the presence of chemical potential.

Sachin Jain

2009-12-14T23:59:59.000Z

438

A Possible Higher Order Correction to the chiral Vortical Conductivity in a Gauge Field Plasma  

E-Print Network (OSTI)

The two loop contributions to the chiral vortical conductivity are considered. The Kubo formula together with the anomalous Ward identity of the axial vector current suggest that there may be a nonzero correction to the coefficient of the $T^2$ term of the conductivity.

Defu Hou; Hui Liu; Hai-cang Ren

2012-10-03T23:59:59.000Z

439

Universal properties of thermal and electrical conductivity of gauge theory plasmas from holography  

E-Print Network (OSTI)

We show that for CFT's admitting gravity duals, thermal conductivity is fixed by central charges in a universal manner. We also discuss possible bound on thermal conductivity. Using this universality relation exhibited by thermal conductivity, we show how to express electrical conductivity in terms of thermodynamical quantities even in the presence of chemical potential i.e. electrical conductivity can be calculated without writing down perturbation equations and solving them even at nonvanishing chemical potential.

Jain, Sachin

2009-01-01T23:59:59.000Z

440

Evaluation of PERSIANN-CCS Rainfall Measurement Using the NAME Event Rain Gauge Network  

Science Conference Proceedings (OSTI)

Robust validation of the space–time structure of remotely sensed precipitation estimates is critical to improving their quality and confident application in water cycle–related research. In this work, the performance of the Precipitation ...

Yang Hong; David Gochis; Jiang-tao Cheng; Kuo-lin Hsu; Soroosh Sorooshian

2007-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Generalized Lorentz-Dirac Equation for a Strongly Coupled Gauge Theory  

SciTech Connect

We derive a semiclassical equation of motion for a 'composite' quark in strongly coupled large-N{sub c} N=4 super Yang-Mills theory, making use of the anti-de Sitter space/conformal field theory correspondence. The resulting nonlinear equation incorporates radiation damping, and reduces to the standard Lorentz-Dirac equation for external forces that are small on the scale of the quark Compton wavelength, but has no self-accelerating or preaccelerating solutions. From this equation one can read off a nonstandard dispersion relation for the quark, as well as a Lorentz-covariant formula for its radiation rate.

Chernicoff, Mariano; Garcia, J. Antonio; Gueijosa, Alberto [Departamento de Fisica de Altas Energias, Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Apartado Postal 70-543, Mexico Distrito Federal 04510 (Mexico)

2009-06-19T23:59:59.000Z

442

Open and Closed String Worldsheets from Free Large N Gauge Theories with Adjoint and Fundamental Matter  

E-Print Network (OSTI)

We extend Gopakumar's prescription for constructing closed string worldsheets from free field theory diagrams with adjoint matter to open and closed string worldsheets arising from free field theories with fundamental matter. We describe the extension of the gluing mechanism and the electrical circuit analogy to fundamental matter. We discuss the generalization of the existence and uniqueness theorem of Strebel differentials to open Riemann surfaces. Two examples are computed of correlators containing fundamental matter, and the resulting worldsheet OPE's are computed. Generic properties of Gopakumar's construction are discussed.

Itamar Yaakov

2006-07-30T23:59:59.000Z

443

Penning Gauge Sensitivity and Spectra for Use in DIII-D  

E-Print Network (OSTI)

Bull. Am. Phys. Soc. 53, 132 (2008)50th American Physical Society Annual Meeting of Division of Plasma Physics Dallas Texas, US, 2008999615730

Sheffield, T.Y.

2008-08-18T23:59:59.000Z

444

Variational description of multi-fluid hydrodynamics: Coupling to gauge fields  

E-Print Network (OSTI)

In this work we extend our previously developed formalism of Newtonian multi-fluid hydrodynamics to allow for coupling between the fluids and the electromagnetic and gravitational field. This is achieved within the convective variational principle by using a standard minimal coupling prescription. In addition to the conservation of total energy and momentum, we derive the conservation of canonical vorticity and helicity, which generalize the corresponding conserved quantities of uncharged fluids. We discuss the application of this formalism to electrically conducting systems, magnetohydrodynamics and superconductivity. The equations of electric conductors derived here are more general than those found in the standard description of such systems, in which the effect of entrainment is overlooked, despite the fact that it will generally be present in any conducting multi-constituent system.

Reinhard Prix

2005-03-29T23:59:59.000Z

445

Conformal Higgs model: Charged gauge fields can produce a 125GeV resonance  

E-Print Network (OSTI)

In the conformal Higgs model, the dynamical value of parameter $\\lambda$ in Lagrangian term $-\\lambda(\\Phi^\\dag\\Phi)^2$ depends on the mass of an intermediate neutral boson field that combines interacting scalars $W^+_\\mu W_-^\\mu$ and $Z^*_\\mu Z^\\mu$. If this mass is $125GeV$, $\\lambda$ is negative and of order $10^{-88}$, in agreement with the empirical value deduced from well-established cosmological and electroweak data. Hence this intermediate scalar boson field is a candidate to explain the recently observed LHC resonance. The conformal Higgs model considers coupled fields: metric tensor $g_{\\mu\

R. K. Nesbet

2013-03-28T23:59:59.000Z

446

1992 Trieste Lectures on Topological Gauge Theory and Yang-Mills Theory  

E-Print Network (OSTI)

In these lecture notes we explain a connection between Yang-Mills theory on arbitrary Riemann surfaces and two types of topological field theory, the so called $BF$ and cohomological theories. The quantum Yang-Mills theory is solved exactly using path integral techniques. Explicit expressions, in terms of group representation theory, are obtained for the partition function and various correlation functions. In a particular limit the Yang-Mills theory devolves to the topological models and the previously determined correlation functions give topological information about the moduli spaces of flat connections. In particular, the partition function yields the volume of the moduli space for which an explicit expression is derived. These notes are self contained, with a basic introduction to the various ideas underlying the topological field theories. This includes some relatively new work on handling problems that arise in the presence of reducible connections which in turn forms the bridge between the various models under consideration. These notes are identical to those made available to participants of the 1992 summer school in Trieste, except for one or two additions added circa January 1993.

George Thompson

1993-05-24T23:59:59.000Z

447

National Computational Infrastructure for LatticeGauge Theory SciDAC-2 Closeout Report  

SciTech Connect

As part of the reliability project work, researchers from Vanderbilt University, Fermi National Laboratory and Illinois Institute of technology developed a real-time cluster fault-tolerant cluster monitoring framework. The goal for the scientific workflow project is to investigate and develop domain-specific workflow tools for LQCD to help effectively orchestrate, in parallel, computational campaigns consisting of many loosely-coupled batch processing jobs. Major requirements for an LQCD workflow system include: a system to manage input metadata, e.g. physics parameters such as masses, a system to manage and permit the reuse of templates describing workflows, a system to capture data provenance information, a systems to manage produced data, a means of monitoring workflow progress and status, a means of resuming or extending a stopped workflow, fault tolerance features to enhance the reliability of running workflows. In summary, these achievements are reported: • Implemented a software system to manage parameters. This includes a parameter set language based on a superset of the JSON data-interchange format, parsers in multiple languages (C++, Python, Ruby), and a web-based interface tool. It also includes a templating system that can produce input text for LQCD applications like MILC. • Implemented a monitoring sensor framework in software that is in production on the Fermilab USQCD facility. This includes equipment health, process accounting, MPI/QMP process tracking, and batch system (Torque) job monitoring. All sensor data are available from databases, and various query tools can be used to extract common data patterns and perform ad hoc searches. Common batch system queries such as job status are available in command line tools and are used in actual workflow-based production by a subset of Fermilab users. • Developed a formal state machine model for scientific workflow and reliability systems. This includes the use of Vanderbilt’s Generic Modeling Envirnment (GME) tool for code generation for the production of user APIs, code stubs, testing harnesses, and model correctness verification. It is used for creating wrappers around LQCD applications so that they can be integrated into existing workflow systems such as Kepler. • Implemented a database system for tracking the state of nodes and jobs managed by the Torque batch systems used at Fermilab. This robust system and various canned queuries are used for many tasks, including monitoring the health of the clusters, managing allocated projects, producing accounting reports, and troubleshooting nodes and jobs.

Bapty, Theodore; Dubey, Abhishek

2013-07-18T23:59:59.000Z

448

Changes in TRMM Rainfall due to the Orbit Boost Estimated from Buoy Rain Gauge Data  

Science Conference Proceedings (OSTI)

During the first three-and-a-half years of the Tropical Rainfall Measuring Mission (TRMM), the TRMM satellite operated at a nominal altitude of 350 km. To reduce drag, save maneuvering fuel, and prolong the mission lifetime, the orbit was boosted ...

Jeremy D. DeMoss; Kenneth P. Bowman

2007-09-01T23:59:59.000Z

449

Spin gravity: a non-Abelian gauge theory on a flat spacetime  

E-Print Network (OSTI)

In this paper, I show that a Yang-Mills force with a U(1)$\\timesSU(2)\\times$SU(2) group symmetry predicts solar system observations of gravitational behavior as well as binary pulsar precession provided that mass is redefined as intrinsic static pressure and all stress-energy-momentum tensors are, thus, traceless. Using a homogeneous, isotropic universe model, I show that this theory explains the accelerating expansion of the universe directly from group symmetry with no ad hoc constants and predicts that antimatter and matter gravitationally repel one another (antimatter "falls" up). In addition, because it is a generic massless Yang-Mills theory, it is a renormalizable quantum theory.

T. D. Andersen

2009-12-19T23:59:59.000Z

450

Comparison of Gridded Multisatellite Rainfall Estimates with Gridded Gauge Rainfall over West Africa  

Science Conference Proceedings (OSTI)

Two monthly gridded precipitation datasets of the Global Precipitation Climatology Project (GPCP; the multisatellite product) and the Global Precipitation Climatology Centre (GPCC) Variability Analysis of Surface Climate Observations (VASClimO; ...

Benjamin L. Lamptey

2008-01-01T23:59:59.000Z

451

Selection of ENRAF gauge wire material compatible with the Hanford waste tank environment  

Science Conference Proceedings (OSTI)

This document describes the selection of the wire material that will replace the 316 SS wire in the ENRAF level indicators.

Anantatmula, R.P.

1994-12-01T23:59:59.000Z

452

FES99: A Global Tide Finite Element Solution Assimilating Tide Gauge and Altimetric Information  

Science Conference Proceedings (OSTI)

An improved version of the global hydrodynamic tide solutions [finite element solutions (FESs) FES94, FES95.2.1, and FES98] has been developed, implemented, and validated. The new model is based on the resolution of the tidal barotropic equations ...

F. Lefèvre; F. H. Lyard; C. Le Provost; E. J. O. Schrama

2002-09-01T23:59:59.000Z

453

J2: Electron Beam Bead-On-Plate Welding Process for Thick Gauge ...  

Science Conference Proceedings (OSTI)

A8: Microstructural Investigation of Nano-Calcium Phosphates Doped with Fluoride Ions .... D7: Surfactant Structure–property Relationship: Effect of Polypropylene ... E4: The Effect of Monobutyl Ether Ethylene Glycol on the Conductivity and ...

454

Geostatistical Mapping of Precipitation from Rain Gauge Data Using Atmospheric and Terrain Characteristics  

Science Conference Proceedings (OSTI)

A geostatistical framework for integrating lower-atmosphere state variables and terrain characteristics into the spatial interpolation of rainfall is presented. Lower-atmosphere state variables considered are specific humidity and wind, derived ...

Phaedon C. Kyriakidis; Jinwon Kim; Norman L. Miller

2001-11-01T23:59:59.000Z

455

Theoretical framework to analyze searches for hidden light gauge bosons in electron scattering fixed target experiments  

E-Print Network (OSTI)

Motivated by anomalies in cosmic ray observations and by attempts to solve questions of the Standad Model of particle physics like the (g-2)_mu discrepancy, U(1) extensions of the Standard Model have been proposed in recent years. Such U(1) extensions allow for the interaction of Dark Matter by exchange of a photon-like massive force carrier \\gamma' not included in the Standard Model. In order to search for \\gamma' bosons various experimental programs have been started. One approach is the dedicated search at fixed-target experiments at modest energies as performed at MAMI or at the Jefferson Lab. In these experiments the process e(A,Z)->e(A,Z)l^+l^- is investigated and a search for a very narrow resonance in the invariant mass distribution of the l^+l^- pair is performed. In this work we analyze this process in terms of signal and background in order to describe existing data obtained by the A1 experiment at MAMI with the aim to give accurate predictions for exclusion limits in the \\gamma' parameter space. We present a detailed theoretical analysis of the cross sections entering in the description of such processes.

T. Beranek; H. Merkel; M. Vanderhaeghen

2013-03-11T23:59:59.000Z

456

Toward a General Theory for Multiphase Turbulence Part I: Development and Gauging of the Model Equations  

SciTech Connect

A formalism for developing multiphase turbulence models is introduced by analogy to the phenomenological method used for single-phase turbulence. A sample model developed using the formalism is given in detail. The procedure begins with ensemble averaging of the exact conservation equations, with closure accomplished by using a combination of analytical and experimental results from the literature. The resulting model is applicable to a wide range of common multiphase flows including gas-solid, liquid-solid and gas-liquid (bubbly) flows. The model is positioned for ready extension to three-phase turbulence, or for use in two-phase turbulence in which one phase is accounted for in multiple size classes, representing polydispersivity. The formalism is expected to suggest directions toward a more fundamentally based theory, similar to the way that early work in single-phase turbulence has led to the spectral theory. The approach is unique in that a portion of the total energy decay rate is ascribed to each phase, as is dictated by the exact averaged equations, and results in a transport equation for energy decay rate associated with each phase. What follows is a straightforward definition of a turbulent viscosity for each phase, and accounts for the effect of exchange of fluctuational energy among phases on the turbulent shear viscosity. The model also accounts for the effect of slip momentum transfer among the phases on the production of turbulence kinetic energy and on the tensor character of the Reynolds stress. Collisional effects, when appropriate, are included by superposition. The model reduces to a standard form in limit of a single, pure material, and is expected to do a credible job of describing multiphase turbulent flows in a wide variety of regimes using a single set of coefficients.

B. A. Kashiwa; W. B. VanderHeyden

2000-12-01T23:59:59.000Z

457

Validation of Satellite-Based Precipitation Products over Sparsely Gauged African River Basins  

Science Conference Proceedings (OSTI)

Six satellite-based rainfall estimates (SRFE)—namely, Climate Prediction Center (CPC) morphing technique (CMORPH), the Rainfall Estimation Algorithm, version 2 (RFE2.0), Tropical Rainfall Measuring Mission (TRMM) 3B42, Goddard profiling algorithm, ...

Vera Thiemig; Rodrigo Rojas; Mauricio Zambrano-Bigiarini; Vincenzo Levizzani; Ad De Roo

2012-12-01T23:59:59.000Z

458

Performance of the Precipitation Occurrence Sensor System as a Precipitation Gauge  

Science Conference Proceedings (OSTI)

The Precipitation Occurrence Sensor System (POSS) is a small X-band Doppler radar originally developed by the Meteorological Service of Canada for reporting the occurrence, type, and intensity of precipitation from Automated Weather Observing ...

B. E. Sheppard; P. I. Joe

2008-02-01T23:59:59.000Z

459

Digitizing Chart Recorder Data: Coordinate System Conversion for Rain Gauges and Similar Recording Instruments  

Science Conference Proceedings (OSTI)

Though chart recorder data are widely available for many environmental parameters over long periods of record, the nonorthogonal coordinate systems of many types of recorder charts complicates data extraction such that it is almost always manual; ...

M. Todd Walter; Paul Mutch; Christa D. Salmon; Donald K. McCool; Lars O. Hedin

1999-08-01T23:59:59.000Z

460

Global Precipitation Retrievals Using the NOAA AMSU Millimeter-Wave Channels: Comparisons with Rain Gauges  

E-Print Network (OSTI)

A surface-precipitation-rate retrieval algorithm for 13-channel Advanced Microwave Sounding Unit (AMSU) millimeter-wave spectral observations from 23 to 191 GHz is described. It was trained using cloud-resolving fifth-generation ...

Surussavadee, Chinnawat

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Minimally extended elctroweak gauge theories in SO(10) and E/sub 6/  

SciTech Connect

The possibility of minimally extending the standard SU(2)/sub L/xU(1) electroweak theory within the context of SO(10) and E/sub 6/ grand unification by adding U(1) factors is explored. The neutrino neutral-current interactions in these schemes are arranged to coincide with the standard-model predictions. Limits on the masses of the extra Z's generated by these U(1) factors are obtained by considering other parity-violating effects. Additional Z's as light as 2.5 to 3.0 times the standard model Z/sup 0/ mass are allowed.

Robinett, R.W.; Rosner, J.L.

1982-11-01T23:59:59.000Z

462

1 The Gauge Block Handbook by Ted Doiron and John Beers ...  

Science Conference Proceedings (OSTI)

... 8.4 Granite 6.3 ... Zerodur Fused Silica Invar Tungsten Carbide Oak Granite Chrome Carbide Steel GB (500mm) Steel GB (25mm) Aluminum Brass ...

2007-04-20T23:59:59.000Z

463

Sources Of Average Individual Radiation Exposure  

NLE Websites -- All DOE Office Websites (Extended Search)

Of Average Individual Radiation Exposure Of Average Individual Radiation Exposure Natural background Medical Consumer products Industrial, security, educational and research Occupational 0.311 rem 0.300 rem 0.013 rem 0.0003 rem 0.0005 rem Savannah River Nuclear Solutions, LLC, provides radiological protection services and oversight at the Savannah River Site (SRS). These services include radiation dose measurements for persons who enter areas where they may be exposed to radiation or radioactive material. The results are periodically reported to monitored individuals. The results listed are based on a radiation dose system developed by the International Commission on Radiation Protection. The system uses the terms "effective dose," "equivalent dose" and units of rem. You may be more familiar with the term "millirem" (mrem), which is 1/1000 of a rem.

464

A Dynamic GIS–Multicriteria Technique for Siting the NASA–Clark Atlanta Urban Rain Gauge Network  

Science Conference Proceedings (OSTI)

Because Atlanta, Georgia, is a model of rapid transition from forest/agriculture land use to urbanization, NASA and other agencies have initiated programs to identify and understand how urban heat islands (UHIs) impact the environment in terms of ...

J. Marshall Shepherd; Olayiwola O. Taylor; Carlos Garza

2004-09-01T23:59:59.000Z

465

Higgs Boson Mass and Electroweak-Gravity Hierarchy from Dynamical Gauge-Higgs Unification in the Warped Spacetime  

E-Print Network (OSTI)

Dynamical electroweak symmetry breaking by the Hosotani mechanism in the Randall-Sundrum warped spacetime is examined, relations among the W-boson mass (m_W), the Kaluza-Klein mass scale (M_{KK}), and the Higgs boson mass (m_H) being derived. It is shown that M_{KK}/m_W = (2 pi kR)^{1/2} (pi/theta_W) and m_H /m_W = 0.058 kR (pi/theta_W), where k^2, R, and theta_W are the curvature and size of the extra-dimensional space and the Wilson line phase determined dynamically. For typical values kR = 12 and theta_W = (0.2 to 0.4) pi, one finds that M_{KK} = (1.7 to 3.5) TeV, k = (1.3 to 2.6) x 10^{19} GeV, and m_H = (140 to 280) GeV.

Yutaka Hosotani; Mitsuru Mabe

2005-03-02T23:59:59.000Z

466

Gas Supply Outlook - Gauging Wellhead Deliverability Now and in the Future: Report Series on Natural Gas and Power Reliability  

Science Conference Proceedings (OSTI)

While developers are postponing or cutting back plans for new natural gas-fired plants, the next few years will record additions of gas-fired capacity. Over the long term, this growth is expected to continue, causing a 30 percent increase in U.S. natural gas demand by 2015. Are there any limits to the U.S. "dash to gas"? Extraordinarily high gas prices during the winter of 2000-01 offered a warning. The current study investigates the availability of natural gas, asking what is reasonable to expect.

2002-02-12T23:59:59.000Z

467

String models of glueballs and the spectrum of SU(N) gauge theories in 2+1 dimensions  

E-Print Network (OSTI)

The spectrum of glueballs in 2+1 dimensions is calculated within an extended class of Isgur-Paton flux tube models and is compared to lattice calculations of the low-lying SU(N) glueball mass spectra. Our modifications of the model include a string curvature term and different ways of dealing with the flux tube width. We find that the generic model is remarkably successful at reproducing the positive charge conjugation, C=+, sector of the spectrum. The only large (and robust) discrepancy involves the 0-+ state. This raises the interesting possibility that the lattice spin identification is mistaken and that this state is in fact 4-+. In addition, the Isgur-Paton model does not incorporate any mechanism for splitting C=+ from C=- (in contrast to the case in 3+1 dimensions), while the `observed' spectrum shows a substantial splitting. We explore several modifications of the model in an attempt to incorporate this physics in a natural way. At the qualitative level we find that this constrains our choice to a picture in which the C=+/- splitting is driven by mixing with new states built on closed loops of adjoint flux. However a detailed numerical comparison suggests that a model incorporating an additional direct mixing between loops of opposite orientation is likely to work better; and that, in any case, a non-zero curvature term will be required. We also point out that a characteristic of any string model of glueballs is that the SU(N=infinity) mass spectrum will consist of multiple towers of states that are scaled up copies of each other. To test this will require a lattice mass spectrum that extends to somewhat larger masses than currently available.

Robert W. Johnson; Michael J. Teper

2000-12-21T23:59:59.000Z

468

Analysis of Spontaneous Mass Generation by Iterative Method in the Nambu-Jona-Lasinio Model and Gauge Theories  

E-Print Network (OSTI)

We propose a new iterative method to directly calculate the spontaneous mass generation due to the dynamical chiral symmetry breaking. We can conclude the physical mass definitely without recourse to any other consideration like the free energy comparison.

Ken-Ichi Aoki; Shinnosuke Onai; Daisuke Sato

2013-04-10T23:59:59.000Z

469

The N = 2 and N = 4 Supersymmetric Extensions of the Lorentz- and CPT-Violating Term in Abelian Gauge Theories  

E-Print Network (OSTI)

In this work, we propose the N=2 and N=4 supersymmetric extensions of the Lorentz-breaking Abelian Chern-Simons term. We formulate the question of the Lorentz violation in 6 and 10 dimensions to obtain the bosonic sectors of N=2, and N=4, supersymmetries, respectively. From this, we carry out an analysis in N=1, D=4 superspace and, in terms of N=1, superfields, we are able to write down the N=2 and N=4 supersymmetric versions of the Lorentz-violating action term.

Wander G. Ney; J. A. Helayel-Neto; Wesley Spalenza

2004-10-29T23:59:59.000Z

470

Rainy-Season Duration Estimated from OLR versus Rain Gauge Data and the 2001 Drought in Southeast Brazil  

Science Conference Proceedings (OSTI)

Large precipitation deficits observed during the 2001 austral summer over the southeast region of Brazil contributed to the worsening of the energy crisis that was occurring in the country, with unprecedented social and economic consequences. ...

Sergio H. Franchito; V. Brahmananda Rao; Paulo R. B. Barbieri; Clovis M. E. Santo

2008-05-01T23:59:59.000Z

471

2012 Special Individual (SI) Reporting #11;Analysis Summary  

SciTech Connect

We evaluated the length of time (in days) between the reported monitoring End Date and the date of submission to REMS.

D. E. Hagemeyer

2012-05-05T23:59:59.000Z

472

ORISE: Worker Health Studies - Beryllium Exposure Studies and...  

NLE Websites -- All DOE Office Websites (Extended Search)

of Energy Radiation Exposure Monitoring System (REMS) DOE IISP 10-Year Summary Report Resources Overview Reports Peer-Reviewed Journal Articles Human Subjects Resource Book...

473

A Basic Overview of the Occupational Radiation Exposure Monitoring...  

NLE Websites -- All DOE Office Websites (Extended Search)

and dissemination of occupational radiation exposure information. The annual REMS report is a valuable tool for managing radiological safety programs and for developing...

474

HSS Message, April 2007  

NLE Websites -- All DOE Office Websites (Extended Search)

through the DOE reporting systems such as CAIRS, which deals with illness and injury; ORPS, which deals with accidents and near accidents; and REMS, which monitors radiation...

475

Site environmental report for 2003, Volume 1  

E-Print Network (OSTI)

Glossary .at the end of the Glossary to help readers understand the0.2 person- rem) (see Glossary). No regulatory standard

Pauer, Ronald

2004-01-01T23:59:59.000Z

476

O&M First! Resource Efficiency Managers Offer Alternative Approach...  

NLE Websites -- All DOE Office Websites (Extended Search)

Efficiency Managers Offer Alternative Approach to Realizing Energy Efficiency Resource Efficiency Managers, or REMs, offer federal sites a new approach to cost- effectively realize...

477

Multiobjective DC Programming with Infinite Convex Constraints ?  

E-Print Network (OSTI)

1 Business Link, Singapore 117592. 3. School of ... dual problems are presented and the weak, strong and strict converse duality theo- rems are also derived.

478

Negative Poisson's Ratios for Extreme States of Matter  

Science Conference Proceedings (OSTI)

... and the control of light propagation and emission with ... ReM, throughout the disk [thermal ionization and ... turbulence, but suffers a runaway cooling as ...

2001-09-24T23:59:59.000Z

479

GENERAL CATALOG 20102011 20112012  

E-Print Network (OSTI)

from TA-55 Plutonium Facility Building (PF-4). This new waste stream is explained in detail in Section Volume Estimate on an Annual Basis ................... 81 Table 12. Average Isotopic Content of Plutonium Plutonium QA Quality Assurance R&D Research and Development R/hr Roentgen per hour RCRA Resource

California at Davis, University of

480

Draft Environmental Impact Report LAWRENCE BERKELEY NATIONAL LABORATORY  

E-Print Network (OSTI)

from TA-55 Plutonium Facility Building (PF-4). This new waste stream is explained in detail in Section Volume Estimate on an Annual Basis ................... 81 Table 12. Average Isotopic Content of Plutonium Plutonium QA Quality Assurance R&D Research and Development R/hr Roentgen per hour RCRA Resource

Knowles, David William

Note: This page contains sample records for the topic "gauge rem roentgen" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

nadlailon _-_ __.... "" ",,,~~...,....-",-,,,,,,,~,,,-,.,...,._..---..-.--...--.__I~-"" EPA\\-z Risk Assessment  

E-Print Network (OSTI)

and thyroid--not to exceed 10 rems in 13 weeks or 30 rems per year. o Hands, forearms, feet, and ankles to the whole body, 75 mrems to the thyroid, and 25 mrems to any other organ. To protect against the buildup

482

Analysis of radiation exposure - service personnel on Rongerik Atoll: Operation Castle - Shot Bravo. Technical report, 12 March 1985-12 June 1987  

Science Conference Proceedings (OSTI)

External and internal doses are reconstructed for the 28 American servicemen stationed on Rongerik Atoll, Marshall Islands, who were exposed to fallout on 1-2 March 1954 from Shot Bravo of Operation CASTLE. External doses are determined from limited radiation survey and film-badge information. Internal-dose commitments are derived from urinalysis data. The magnitude of the calculated activity intake suggests the principal pathways. Reconstructed film-badge doses are approximately 40 rem, with adjustments from individual activity scenarios, as available. Internal dose commitments to the thyroid and large intestine (nearly all first-year dose) provide the only significant increments to the external dose. Total doses are approximately 230 rem to the thyroid, 115 rem to the lower large intestine, 85 rem to the upper large intestine, and about 40 to 50 rem to all other organs.

Goetz, J.; Klemm, J.; Phillips, J.; Thomas, C.

1987-07-09T23:59:59.000Z

483

gxxx005-sumtab.dvi  

NLE Websites -- All DOE Office Websites (Extended Search)

20 Page 1 GAUGE AND HIGGS BOSONS GAUGE AND HIGGS BOSONS GAUGE AND HIGGS BOSONS GAUGE AND HIGGS BOSONS NODEGXXX005 I (J PC ) 0,1(1 - - ) NODES000 Mass m < 1 10...

484

Engineering Metrology Toolbox  

Science Conference Proceedings (OSTI)

... The Gauge Block Handbook Contact Deformation in ... Software System User's Manual Gauge Blocks ... Notes on the Fundamentals of Measurement ...

485

Recommendations in International Commission on Radiological Protection-103 and its Potential Impacts to the Nuclear Industry Workfor ce  

Science Conference Proceedings (OSTI)

The nuclear power industry has significantly reduced collective exposures in the past two decades, but with the adoption of the International Council of Radiation Protection (ICRP) Publication 103, management of individual dose will become more challenging as the regulatory limit may decrease from 5 rem/year to 2 rem/year. It is anticipated that plant administrative limits will be reduced to 1-1.5 rem to ensure compliance. It is estimated that these changes could affect approximately 1,000 workers, many ...

2010-12-14T23:59:59.000Z

486

Monte Carlo tools for studies of non-standard electroweak gauge boson interactions in multi-boson processes: A Snowmass White Paper  

E-Print Network (OSTI)

In this Snowmass 2013 white paper, we review the effective field theory approach for studies of non-standard electroweak interactions in electroweak vector boson pair and triple production and vector boson scattering. We present an overview of the implementation of dimension six and eight operators in MadGraph5, VBFNLO, and WHIZARD, and provide relations between the coefficients of these higher dimensions operators used in these programs and in the anomalous couplings approach. We perform a tuned comparison of predictions for multi-boson processes including non-standard electroweak interactions with MadGraph5, VBFNLO, and WHIZARD. We discuss the role of higher-order corrections in these predictions using VBFNLO and a POWHEG BOX implementation of higher-order QCD corrections to WWjj production. The purpose of this white paper is to collect useful tools for the study of non-standard EW physics at the LHC, compare them, and study the main physics issues in the relevant processes.

Celine Degrande; Oscar Eboli; Bastian Feigl; Barbara Jäger; Wolfgang Kilian; Olivier Mattelaer; Michael Rauch; Jürgen Reuter; Marco Sekulla; Doreen Wackeroth

2013-09-30T23:59:59.000Z

487

Sensitivity of WSR-88D Rainfall Estimates to the Rain-Rate Threshold and Rain Gauge Adjustment: A Flash Flood Case Study  

Science Conference Proceedings (OSTI)

A strong thunderstorm produced a flash flood on the evening of 12 July 1996 in Buffalo Creek, Colorado, that caused two deaths and significant property damage. Most of the rain fell in a 1-h time period from 2000 to 2100 MDT. The performance of ...

Richard A. Fulton

1999-10-01T23:59:59.000Z

488

An Evaluation of the Statistics of Rainfall Extremes in Rain Gauge Observations, and Satellite-Based and Reanalysis Products Using Universal Multifractals  

Science Conference Proceedings (OSTI)

Confidence in the estimation of variations in the frequency of extreme events, and specifically extreme precipitation, in response to climate variability and change is key to the development of adaptation strategies. One challenge to establishing ...

Xiaoming Sun; Ana P. Barros

2010-04-01T23:59:59.000Z

489

Comment on C. W. Wong, Maxwell equations and the redundant gauge degree of freedom 2009 Eur. J. Phys. 30, 1401-1416  

SciTech Connect

In the paper cited in the title, the author makes the claim that in classical electromagnetic theory the longitudinal electric field is instantaneous, corresponding to action at a distance, contrary to popular and correct belief. We point out that the determination of the speed of propagation of electromagnetic fields requires specification of the initial condition of the sources or equivalent. The Coulomb field of a stationary point charge proves nothing. We describe in detail a simple example to illustrate the universal onset of the static 'instantaneous' regime throughout a region of space that expands with the speed of light.

Jackson, John David

2009-10-22T23:59:59.000Z

490

Use of a Rain Gauge Network to Infer the Influence of Environmental Factors on the Propagation of Quasi-Linear Convective Systems in West Africa  

Science Conference Proceedings (OSTI)

The West African squall line is a key quasi-linear storm system that brings much of the precipitation observed in the data-poor Sudanian climate zone. Squall lines propagate at a wide range of speeds and headings, but the lack of operational ...

Jon M. Schrage; Andreas H. Fink

2007-10-01T23:59:59.000Z

491

Practical scheme for a light-induced gauge field in an atomic Bose gas Kenneth J. Gnter,* Marc Cheneau, Tarik Yefsah, Steffen P. Rath, and Jean Dalibard  

E-Print Network (OSTI)

by laser fields. To comprehend the underlying mechanism, consider atoms with a ground state g, which fields are linear combinations of the Zeeman substates g,Jg,m m =-Jg, ... ,Jg . Both the eigenenergies E with positive and negative helicity, respectively, and both the ground g and the excited e states have unit

Dalibard, Jean

492

An Examination of Version-5 Rainfall Estimates from the TRMM Microwave Imager, Precipitation Radar, and Rain Gauges on Global, Regional, and Storm Scales  

Science Conference Proceedings (OSTI)

An evaluation of the version-5 precipitation radar (PR; algorithm 2A25) and Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI; algorithm 2A12) rainfall products is performed across the Tropics in two ways: 1) by comparing long-term ...

Stephen W. Nesbitt; Edward J. Zipser; Christian D. Kummerow

2004-07-01T23:59:59.000Z

493

Experimental Test of the Effects of Z–R Law Variations on Comparison of WSR-88D Rainfall Amounts with Surface Rain Gauge and Disdrometer Data  

Science Conference Proceedings (OSTI)

Reflectivity factors and rainfall rates found from Level II WSR-88D data for the National Weather Service (NWS) radar in Greer, South Carolina (KGSP), are compared with similar parameters found from disdrometer data collected at the Clemson ...

Carlton W. Ulbrich; Neil E. Miller

2001-06-01T23:59:59.000Z

494