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Title: Transversity distribution does not contribute to hard exclusive electroproduction of mesons

Abstract

We show that in hard exclusive electroproduction, ep{yields}eVp, the leading-twist hard-scattering coefficient for the production of a transversely polarized vector meson V vanishes to all orders of perturbation theory. This implies that this process cannot be used to measure the skewed transversity distribution of quarks in a hadron. In contrast, a recent calculation obtained a non-zero value at NLO. We show that this calculation is incorrect because it failed to include the necessary collinear subtractions. Our method of proof also applies to other processes whose hard-scattering coefficients are constrained by chirality and helicity conservation, and thus validates helicity selection rules based on these symmetries. (c) 2000 The American Physical Society.

Authors:
 [1];  [2]
  1. Physics Department, Penn State University, 104 Davey Laboratory, University Park, Pennsylvania 16802 (United States)
  2. Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg, (Germany)
Publication Date:
OSTI Identifier:
20216469
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 61; Journal Issue: 11; Other Information: PBD: 1 Jun 2000; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ELECTRON-PROTON INTERACTIONS; ELECTROPRODUCTION; VECTOR MESONS; PROTONS; QUARKS; PERTURBATION THEORY; QUANTUM CHROMODYNAMICS; CHIRAL SYMMETRY; THEORETICAL DATA

Citation Formats

Collins, J. C., and Diehl, M. Transversity distribution does not contribute to hard exclusive electroproduction of mesons. United States: N. p., 2000. Web. doi:10.1103/PhysRevD.61.114015.
Collins, J. C., & Diehl, M. Transversity distribution does not contribute to hard exclusive electroproduction of mesons. United States. doi:10.1103/PhysRevD.61.114015.
Collins, J. C., and Diehl, M. Thu . "Transversity distribution does not contribute to hard exclusive electroproduction of mesons". United States. doi:10.1103/PhysRevD.61.114015.
@article{osti_20216469,
title = {Transversity distribution does not contribute to hard exclusive electroproduction of mesons},
author = {Collins, J. C. and Diehl, M.},
abstractNote = {We show that in hard exclusive electroproduction, ep{yields}eVp, the leading-twist hard-scattering coefficient for the production of a transversely polarized vector meson V vanishes to all orders of perturbation theory. This implies that this process cannot be used to measure the skewed transversity distribution of quarks in a hadron. In contrast, a recent calculation obtained a non-zero value at NLO. We show that this calculation is incorrect because it failed to include the necessary collinear subtractions. Our method of proof also applies to other processes whose hard-scattering coefficients are constrained by chirality and helicity conservation, and thus validates helicity selection rules based on these symmetries. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevD.61.114015},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 11,
volume = 61,
place = {United States},
year = {2000},
month = {6}
}