Examination of higherorder twist contributions in parityviolating deepinelastic electrondeuteron scattering
Abstract
We show that parityviolating deepinelastic scattering (PVDIS) of longitudinally polarized electrons from deuterium can in principle be a relatively clean probe of higher twist quarkquark 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 fourquark operator. We reformulate the BjorkenWolfenstein 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 twistfour operator satisfies the CallanGross relation, the ratio of parityviolating longitudinal and transverse cross sections, R{sup {gamma}}Z, is identical to that for purely electromagnetic scattering, R{sup {gamma}}, up to perturbative and powersuppressed 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 twistfour 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 »
 Authors:

 University of WisconsinMadison, Madison, Wisconsin 53706 (United States)
 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 05562813
 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; ELECTRONMOLECULE 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; LEPTONBARYON INTERACTIONS; LEPTONHADRON INTERACTIONS; LEPTONNUCLEON INTERACTIONS; LEPTONS; LIGHT NUCLEI; LINEAR ACCELERATORS; MATHEMATICAL MODELS; MOLECULE COLLISIONS; NUCLEI; ODDODD NUCLEI; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PROPERTIES; QUARK MODEL; SCATTERING; STABLE ISOTOPES
Citation Formats
Mantry, Sonny, RamseyMusolf, Michael J, California Institute of Technology, Pasadena, California 91125, and Sacco, Gian Franco. Examination of higherorder twist contributions in parityviolating deepinelastic electrondeuteron scattering. United States: N. p., 2010.
Web. doi:10.1103/PHYSREVC.82.065205.
Mantry, Sonny, RamseyMusolf, Michael J, California Institute of Technology, Pasadena, California 91125, & Sacco, Gian Franco. Examination of higherorder twist contributions in parityviolating deepinelastic electrondeuteron scattering. United States. https://doi.org/10.1103/PHYSREVC.82.065205
Mantry, Sonny, RamseyMusolf, Michael J, California Institute of Technology, Pasadena, California 91125, and Sacco, Gian Franco. Wed .
"Examination of higherorder twist contributions in parityviolating deepinelastic electrondeuteron scattering". United States. https://doi.org/10.1103/PHYSREVC.82.065205.
@article{osti_21499292,
title = {Examination of higherorder twist contributions in parityviolating deepinelastic electrondeuteron scattering},
author = {Mantry, Sonny and RamseyMusolf, Michael J and California Institute of Technology, Pasadena, California 91125 and Sacco, Gian Franco},
abstractNote = {We show that parityviolating deepinelastic scattering (PVDIS) of longitudinally polarized electrons from deuterium can in principle be a relatively clean probe of higher twist quarkquark 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 fourquark operator. We reformulate the BjorkenWolfenstein 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 twistfour operator satisfies the CallanGross relation, the ratio of parityviolating longitudinal and transverse cross sections, R{sup {gamma}}Z, is identical to that for purely electromagnetic scattering, R{sup {gamma}}, up to perturbative and powersuppressed 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 twistfour 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 = {05562813},
number = 6,
volume = 82,
place = {United States},
year = {2010},
month = {12}
}