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Title: Research in high energy physics. Progress report, July 1, 1992--June 30, 1993

Abstract

This report discusses research being conducted in High Energy Physics at Northwestern University.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Northwestern Univ., Evanston, IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10169436
Report Number(s):
DOE/ER/40684-3
ON: DE93018031; TRN: 93:018906
DOE Contract Number:
FG02-91ER40684
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Jul 1993
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; HIGH ENERGY PHYSICS; RESEARCH PROGRAMS; PROGRESS REPORT; PHOTOPRODUCTION; SHOWER COUNTERS; POLARIZED BEAMS; POLARIZED TARGETS; MUON BEAMS; QUARKONIUM; FIELD THEORIES; SCATTERING; CHARMONIUM; PARTICLE PRODUCTION; PROTON-ANTIPROTON INTERACTIONS; 662000; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Rosen, J., Block, M., Buchholz, D., Gobbi, B., Schellman, H., Miller, D., Braaten, E., and Oakes, R. Research in high energy physics. Progress report, July 1, 1992--June 30, 1993. United States: N. p., 1993. Web. doi:10.2172/10169436.
Rosen, J., Block, M., Buchholz, D., Gobbi, B., Schellman, H., Miller, D., Braaten, E., & Oakes, R. Research in high energy physics. Progress report, July 1, 1992--June 30, 1993. United States. doi:10.2172/10169436.
Rosen, J., Block, M., Buchholz, D., Gobbi, B., Schellman, H., Miller, D., Braaten, E., and Oakes, R. Thu . "Research in high energy physics. Progress report, July 1, 1992--June 30, 1993". United States. doi:10.2172/10169436. https://www.osti.gov/servlets/purl/10169436.
@article{osti_10169436,
title = {Research in high energy physics. Progress report, July 1, 1992--June 30, 1993},
author = {Rosen, J. and Block, M. and Buchholz, D. and Gobbi, B. and Schellman, H. and Miller, D. and Braaten, E. and Oakes, R.},
abstractNote = {This report discusses research being conducted in High Energy Physics at Northwestern University.},
doi = {10.2172/10169436},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jul 01 00:00:00 EDT 1993},
month = {Thu Jul 01 00:00:00 EDT 1993}
}

Technical Report:

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  • Progress on Task A centered around data analysis. E835 is now approved. It will extend E760 studies, exploring new charmonium states and featuring an upgraded detector system plus operation at 4--6 times higher luminosity. Results are given on E760 analysis. Task B has 10 papers that have either appeared in print, or have been prepared for publication. They break down into four categories; experimental physics, theoretical physics, and computer computational techniques. They are described here along with an exciting new experimental proposal to use Da{Phi}ne, the {Phi} factory that is being constructed at Frascati National Laboratory. Progress for Task Cmore » which includes participating in the D0 project at TeV I, and the photoproduction experiment, E687, at TeV II is given. While Northwestern is not participating in the top quark physics group at D0, they have been involved in the data analysis and the discussions that led to the limits on the top quark mass. Task D comprises the shared services for the Northwestern DOE contract. This includes the maintenance and operation of all computers within the HEP group. The projects supported by Task D during the past year are given. Task E progress was to resolve the apparent conflict between EMC, SMC, and SLAC results on nucleon structure functions and Bjorken sum rules. Task F covered research in hadronic decay of the tau, thermal field theory, plasma effects in astrophysics, and heavy quarkonium. Task G covers E665, a general purpose muon scattering experiment which can detect both the scattered muon and most charged and neutral hadrons produced in the forward region. The Northwest group has collaborated very closely in the past year with the Harvard group on analyses of structure functions and vector meson production in the 1991 data sample.« less
  • The effort of the experimental group has been concentrated on the CERN ALEPH and FERMILAB D0 collider experiments and completion of two fixed target experiments. The BNL fixed target experiment 771 took the world`s largest sample of D(1285) and E/iota(1420) events, using pion, kaon and antiproton beams. Observing the following resonances: 0{sup {minus_plus}} [1280], 1{sup {plus}{plus}} [1280], 0{sup {minus_plus}} [1420], 0{sup {minus_plus}} [1470], 1{sup {plus_minus}} [1415]. The Fermilab fixed target experiment E711, dihadron production in pN interactions at 800 GeV, completed data reduction and analysis. The atomic weight dependence, when parameterized as {sigma}(A) = {sigma}{sub o}A{sup {alpha}}, yielded a valuemore » of {alpha} = 1.043 {plus_minus} 0.011 {plus_minus} .012. The cross section per nucleon and angular distributions was also measured as a function of two particle mass and agrees very well with QCD calculations. The D0 Fermilab Collider Experiment E740 began its first data taking run in April 1992. The CERN collider experiment ALEPH at LEP is presently taking more data. The Z mass and width, the couplings to the upper and lower components of the hadronic isospin doublet, forward-backward asymmetries of hadronic events, and measurements of the fragmentation process have been made. The effort of detector development for the SSC has substantially increased with particular emphasis on scintillators, both in fibers and plates. Work has continued on higher-order QCD calculations using the Monte Carlo technique developed previously. This year results for WW, ZZ, WZ, and {sub {gamma}{gamma}} production have been published. A method for incorporating parton showering in such calculations was developed and applied to W production. The multicanonical Monte Carlo algorithm has stood up to the promises anticipated; it was used in multicanonical simulations of first-order phase transitions and for spin glass systems.« less
  • The main emphasis in the theoretical program has been in the area of string theory; also investigated were confinement and other aspects of QCD, electroweak symmetry breaking, and electroweak baryogenesis. The research program in computational physics concentrated on the development of the source Galerkin method of numerical quantum field theory. One portion of the experimental program dealt with interactions of leptons and hadrons from accelerator and strophysics sources. A description of the Large Volume Detector at Gran Sasso and its use as a stellar collapse monitor is given, along with an account of research and development on resistive plate counters.more » The rest of the experimental program concerns hadron collider and neutrino physics, with major emphasis on the D0 experiment at the TeVatron. The commissioning of the D0 detector and its operation are described, along with D0 analysis. Also reported is a novel cryogenic technique utilizing superfluid helium for neutrino calorimetry. 122 refs., 7 tabs., 23 figs.« less
  • Brief narrative descriptions of work performed are given on numerous topics including the following: CP violation, Cabibbo--Kobayashi--Maskawa matrix, and B physics; radiative corrections and electroweak observables; heavy quark symmetry; heavy meson spectroscopy; composite models of quarks and leptons; supersymmetric quantum mechanics, inverse scattering, and the vertex operator; cosmological constraints on lepton-number violation in SO(10) models; black hole evaporation; the light cone in string theory; surfaces in the 3D Ising model; and conformal field theories.
  • This report discusses research in High Energy Physics at Florida State University. Contained in this paper are: highlights of activities during the past few years; five year summary; fixed target experiments; collider experiments; SSC preparation, detector development and detector construction; computing, networking and VAX upgrade to ALPHA; and particle theory programs.