Quark–hadron duality constraints on γZ box corrections to parity-violating elastic scattering

Hall, N. L.; Blunden, P. G.; Melnitchouk, W.; Thomas, A. W.; Young, R. D.

doi:10.1016/j.physletb.2015.11.081

Title: Quark–hadron duality constraints on γZ box corrections to parity-violating elastic scattering

Full Record
Other Related Research

Abstract

We examine the interference \gamma Z box corrections to parity-violating elastic electron--proton scattering in the light of the recent observation of quark-hadron duality in parity-violating deep-inelastic scattering from the deuteron, and the approximate isospin independence of duality in the electromagnetic nucleon structure functions down to Q² \approx 1 GeV². Assuming that a similar behavior also holds for the \gamma Z proton structure functions, we find that duality constrains the γ Z box correction to the proton's weak charge to be Re ^V _{γ Z} ^V = (5.4 \pm 0.4) \times 10^-3 at the kinematics of the Q_weak experiment. Within the same model we also provide estimates of the γ Z corrections for future parity-violating experiments, such as MOLLER at Jefferson Lab and MESA at Mainz.

Authors:: Hall, N. L.; Blunden, P. G.; Melnitchouk, W.; Thomas, A. W.; Young, R. D.

Publication Date:: Mon Feb 01 00:00:00 EST 2016

Research Org.:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI Identifier:: 1229695

Alternate Identifier(s):: OSTI ID: 1227936; OSTI ID: 1229859

Report Number(s):: JLAB-THY-15-2029; DOE/OR/23177-3334; arXiv:1504.03973
Journal ID: ISSN 0370-2693; S037026931500951X; PII: S037026931500951X

Grant/Contract Number:: AC05-06OR23177

Resource Type:: Published Article

Journal Name:: Physics Letters B

Additional Journal Information:: Journal Name: Physics Letters B Journal Volume: 753 Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; parity violation; proton weak charge; quark-hadron duality

Citation Formats


                    Hall, N. L., Blunden, P. G., Melnitchouk, W., Thomas, A. W., and Young, R. D. Quark–hadron duality constraints on γZ box corrections to parity-violating elastic scattering.  Netherlands: N. p., 2016. 
Web.  doi:10.1016/j.physletb.2015.11.081.

Copy to clipboard


                    Hall, N. L., Blunden, P. G., Melnitchouk, W., Thomas, A. W., & Young, R. D. Quark–hadron duality constraints on γZ box corrections to parity-violating elastic scattering.  Netherlands.  https://doi.org/10.1016/j.physletb.2015.11.081

Copy to clipboard


                    Hall, N. L., Blunden, P. G., Melnitchouk, W., Thomas, A. W., and Young, R. D. Mon .  
"Quark–hadron duality constraints on γZ box corrections to parity-violating elastic scattering".  Netherlands.  https://doi.org/10.1016/j.physletb.2015.11.081.

Copy to clipboard


                    
@article{osti_1229695,

  title        = {Quark–hadron duality constraints on γZ box corrections to parity-violating elastic scattering},

  author       = {Hall, N. L. and Blunden, P. G. and Melnitchouk, W. and Thomas, A. W. and Young, R. D.},

  abstractNote = {We examine the interference \gamma Z box corrections to parity-violating elastic electron--proton scattering in the light of the recent observation of quark-hadron duality in parity-violating deep-inelastic scattering from the deuteron, and the approximate isospin independence of duality in the electromagnetic nucleon structure functions down to Q2 \approx 1 GeV2. Assuming that a similar behavior also holds for the \gamma Z proton structure functions, we find that duality constrains the γ Z box correction to the proton's weak charge to be Re V γ Z V = (5.4 \pm 0.4) \times 10-3 at the kinematics of the Qweak experiment. Within the same model we also provide estimates of the γ Z corrections for future parity-violating experiments, such as MOLLER at Jefferson Lab and MESA at Mainz.},

  doi          = {10.1016/j.physletb.2015.11.081},

  journal      = {Physics Letters B},

  number       = C,

  volume       = 753,

  place        = {Netherlands},

  year         = {Mon Feb 01 00:00:00 EST 2016},

  month        = {Mon Feb 01 00:00:00 EST 2016}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Publisher's Version of Record
https://doi.org/10.1016/j.physletb.2015.11.081

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 18 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE PAGES and OSTI.GOV collections:

Laser and Electron Beam Technology for Parity Violating Electron Scattering Measurements

Thesis/Dissertation Palatchi, Caryn

Parity violating electron scattering (PVES) is a precision tool used in a broad program of experiments which include studying the structure of protons and nuclei and searching for new Beyond the Standard Model (BSM) physics. In parity violation electron scattering experiments, a longitudinally polarized electron beam is incident on an unpolarized target. The sign of the longitudinal polarization is changed (making a parity transformation), and the fractional rate difference between right and left helicity states, dσ_R and dσ_L, is measured. An interference between the electromagnetic and weak amplitudes, Mγ and MZ respectively, gives rise to a parity violating asymmetry A_PV =more »« less
https://doi.org/10.2172/1574125

Full Text Available
Contributions From yZ Box Diagrams to Parity Violating Elastic e-p Scattering

Journal Article Benjamin Rislow, Carl Carlson - Physical Review. D, Particles, Fields, Gravitation and Cosmology

Parity-violating (PV) elastic electron-proton scattering measures Q-weak for the proton, Q{sub W}{sup p}. To extract Q{sub W}{sup p} from data, all radiative corrections must be well-known. Recently, disagreement on the {gamma}Z box contribution to Q{sub W}{sup p} has prompted the need for further analysis of this term. Here, we support one choice of a debated factor, go beyond the previously assumed equality of electromagnetic and {gamma}Z structure functions, and find an analytic result for one of the {gamma}Z box integrals. Our numerical evaluation of the {gamma}Z box is in agreement within errors with previous reports, albeit somewhat larger in centralmore »« less
https://doi.org/10.1103/PhysRevD.83.113007

Full Text Available
Model dependence of the {gamma}Z dispersion correction to the parity-violating asymmetry in elastic ep scattering

Journal Article Gorchtein, Mikhail ; Horowitz, C J ; Ramsey-Musolf, Michael J - Physical Review. C, Nuclear Physics

We analyze the dispersion correction to elastic parity violating electron-proton scattering due to {gamma}Z exchange. In particular, we explore the theoretical uncertainties associated with modeling contributions of hadronic intermediate states. Taking into account constraints from low- and high-energy, parity-conserving electroproduction measurements, choosing different models for contributions from the nonresonant processes, and performing the corresponding flavor rotations to obtain the electroweak amplitude, we arrive at an estimate of the uncertainty in the total contribution to the parity-violating asymmetry. At the kinematics of the Q-Weak experiment, we obtain a correction to the asymmetry equivalent to a shift in the proton weak chargemore »« less
https://doi.org/10.1103/PHYSREVC.84.015502
Hadronic γZ box corrections in Møller scattering

Journal Article Hall, N. L. ; Blunden, P. G. ; Melnitchouk, W. ; ... - Physics Letters B

The possibility of measuring the parity-violating asymmetry in Moller scattering with sufficient accuracy to determine sin²Θ_W to 0.1% offers a complementary path to the discovery of new physics to that followed at high energy colliders. We present a new calculation of the γZ box contribution to parity-violating electron-proton scattering, which constitutes an important uncertainty in computing the background to this process. In addition, we show that while the γZ correction grows rapidly with energy, it can be relatively well constrained by data from parity-violating inelastic scattering and parton distribution functions.
Cited by 6
https://doi.org/10.1016/j.physletb.2014.02.049
γZ corrections to forward-angle parity-violating ep scattering

Journal Article Alex Sibirtsev ; Blunden, Peter G. ; Melnitchouk, Wally ; ... - Physical Review. D, Particles, Fields, Gravitation and Cosmology

We use dispersion relations to evaluate the γZ box contribution to parity-violating electron scattering in the forward limit, taking into account constraints from recent JLab data on electroproduction in the resonance region as well as high energy data from HERA. The correction to the asymmetry is found to be 1.2 +- 0.2% at the kinematics of the JLab Q_weak experiment, which is well within the limits required to achieve a 4% measurement of the weak charge of the proton.
Cited by 58
https://doi.org/10.1103/PhysRevD.82.013011

Full Text Available

Similar Records