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Title: Examination of higher-order twist contributions in parity-violating deep-inelastic electron-deuteron scattering

Abstract

We show that parity-violating deep-inelastic scattering (PVDIS) of longitudinally polarized electrons from deuterium can in principle be a relatively clean probe of higher twist quark-quark correlations beyond the parton model. As first observed by Bjorken and Wolfenstein, the dominant contribution to the electron polarization asymmetry, proportional to the axial vector electron coupling, receives corrections at twist four from the matrix element of a single four-quark operator. We reformulate the Bjorken-Wolfenstein argument in a matter suitable for the interpretation of experiments planned at the Thomas Jefferson National Accelerator Facility (JLab). In particular, we observe that because the contribution of the relevant twist-four operator satisfies the Callan-Gross relation, the ratio of parity-violating longitudinal and transverse cross sections, R{sup {gamma}}Z, is identical to that for purely electromagnetic scattering, R{sup {gamma}}, up to perturbative and power-suppressed contributions. This result simplifies the interpretation of the asymmetry in terms of other possible novel hadronic and electroweak contributions. We use the results of MIT Bag Model calculations to estimate contributions of the relevant twist-four operator to the leading term in the asymmetry as a function of Bjorken x and Q{sup 2}. We compare these estimates with possible leading twist corrections from violation of charge symmetry in themore » parton distribution functions.« less

Authors:
 [1];  [1];  [2]
  1. University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)
  2. Jet Propulsion Lab, California Institute of Technology, Pasadena, California 91109 (United States)
Publication Date:
OSTI Identifier:
21499292
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 82; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevC.82.065205; (c) 2010 American Institute of Physics; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ASYMMETRY; BAG MODEL; CEBAF ACCELERATOR; COMPARATIVE EVALUATIONS; CORRECTIONS; CORRELATIONS; COUPLING; CROSS SECTIONS; DEEP INELASTIC SCATTERING; DEUTERIUM; DEUTERONS; DISTRIBUTION FUNCTIONS; ELECTRON-MOLECULE COLLISIONS; ELECTRONS; HADRONS; MATRIX ELEMENTS; PARITY; POLARIZATION; QUARKS; SYMMETRY; ACCELERATORS; CHARGED PARTICLES; COLLISIONS; COMPOSITE MODELS; ELECTRON COLLISIONS; ELEMENTARY PARTICLES; EVALUATION; EXTENDED PARTICLE MODEL; FERMIONS; FUNCTIONS; HYDROGEN ISOTOPES; INELASTIC SCATTERING; INTERACTIONS; ISOTOPES; LEPTON-BARYON INTERACTIONS; LEPTON-HADRON INTERACTIONS; LEPTON-NUCLEON INTERACTIONS; LEPTONS; LIGHT NUCLEI; LINEAR ACCELERATORS; MATHEMATICAL MODELS; MOLECULE COLLISIONS; NUCLEI; ODD-ODD NUCLEI; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PROPERTIES; QUARK MODEL; SCATTERING; STABLE ISOTOPES

Citation Formats

Mantry, Sonny, Ramsey-Musolf, Michael J, California Institute of Technology, Pasadena, California 91125, and Sacco, Gian Franco. Examination of higher-order twist contributions in parity-violating deep-inelastic electron-deuteron scattering. United States: N. p., 2010. Web. doi:10.1103/PHYSREVC.82.065205.
Mantry, Sonny, Ramsey-Musolf, Michael J, California Institute of Technology, Pasadena, California 91125, & Sacco, Gian Franco. Examination of higher-order twist contributions in parity-violating deep-inelastic electron-deuteron scattering. United States. https://doi.org/10.1103/PHYSREVC.82.065205
Mantry, Sonny, Ramsey-Musolf, Michael J, California Institute of Technology, Pasadena, California 91125, and Sacco, Gian Franco. Wed . "Examination of higher-order twist contributions in parity-violating deep-inelastic electron-deuteron scattering". United States. https://doi.org/10.1103/PHYSREVC.82.065205.
@article{osti_21499292,
title = {Examination of higher-order twist contributions in parity-violating deep-inelastic electron-deuteron scattering},
author = {Mantry, Sonny and Ramsey-Musolf, Michael J and California Institute of Technology, Pasadena, California 91125 and Sacco, Gian Franco},
abstractNote = {We show that parity-violating deep-inelastic scattering (PVDIS) of longitudinally polarized electrons from deuterium can in principle be a relatively clean probe of higher twist quark-quark correlations beyond the parton model. As first observed by Bjorken and Wolfenstein, the dominant contribution to the electron polarization asymmetry, proportional to the axial vector electron coupling, receives corrections at twist four from the matrix element of a single four-quark operator. We reformulate the Bjorken-Wolfenstein argument in a matter suitable for the interpretation of experiments planned at the Thomas Jefferson National Accelerator Facility (JLab). In particular, we observe that because the contribution of the relevant twist-four operator satisfies the Callan-Gross relation, the ratio of parity-violating longitudinal and transverse cross sections, R{sup {gamma}}Z, is identical to that for purely electromagnetic scattering, R{sup {gamma}}, up to perturbative and power-suppressed contributions. This result simplifies the interpretation of the asymmetry in terms of other possible novel hadronic and electroweak contributions. We use the results of MIT Bag Model calculations to estimate contributions of the relevant twist-four operator to the leading term in the asymmetry as a function of Bjorken x and Q{sup 2}. We compare these estimates with possible leading twist corrections from violation of charge symmetry in the parton distribution functions.},
doi = {10.1103/PHYSREVC.82.065205},
url = {https://www.osti.gov/biblio/21499292}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 6,
volume = 82,
place = {United States},
year = {2010},
month = {12}
}