skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Factorization for hard exclusive electroproduction of mesons in QCD

Abstract

We formulate and prove a QCD factorization theorem for hard exclusive electroproduction of mesons in QCD. The proof is valid for the leading power in Q and all logarithms. This generalizes previous work on vector meson production in the diffractive region of small x. The amplitude is expressed in terms of off-diagonal generalizations of the usual parton densities. The full theorem applies to all kinds of mesons and not just to vector mesons. The parton densities used include not only the ordinary parton density, but also the helicity density (g{sub 1} or {Delta}q) and the transversity density (h{sub 1} or {delta}q), and these can be probed by measuring the polarization of the produced mesons with unpolarized protons. {copyright} {ital 1997} {ital The American Physical Society}

Authors:
 [1];  [2];  [1]
  1. Department of Physics, Penn State University, 104 Davey Lab., University Park, Pennsylvania 16802 (United States)
  2. Physics Department, Tel-Aviv University, Tel Aviv (Israel)
Publication Date:
OSTI Identifier:
538722
DOE Contract Number:  
FG02-90ER40577; FG02-93ER40771
Resource Type:
Journal Article
Journal Name:
Physical Review, D
Additional Journal Information:
Journal Volume: 56; Journal Issue: 5; Other Information: PBD: Sep 1997
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; ELECTROPRODUCTION; FACTORIZATION; MESONS; QUANTUM CHROMODYNAMICS; ELECTRON-PROTON INTERACTIONS; PARTON MODEL; EXCLUSIVE INTERACTIONS; VECTOR MESONS; PARTONS; DENSITY; HELICITY; POLARIZATION

Citation Formats

Collins, J.C., Frankfurt, L., and Strikman, M.. Factorization for hard exclusive electroproduction of mesons in QCD. United States: N. p., 1997. Web. doi:10.1103/PhysRevD.56.2982.
Collins, J.C., Frankfurt, L., & Strikman, M.. Factorization for hard exclusive electroproduction of mesons in QCD. United States. doi:10.1103/PhysRevD.56.2982.
Collins, J.C., Frankfurt, L., and Strikman, M.. Mon . "Factorization for hard exclusive electroproduction of mesons in QCD". United States. doi:10.1103/PhysRevD.56.2982.
@article{osti_538722,
title = {Factorization for hard exclusive electroproduction of mesons in QCD},
author = {Collins, J.C. and Frankfurt, L. and Strikman, M.},
abstractNote = {We formulate and prove a QCD factorization theorem for hard exclusive electroproduction of mesons in QCD. The proof is valid for the leading power in Q and all logarithms. This generalizes previous work on vector meson production in the diffractive region of small x. The amplitude is expressed in terms of off-diagonal generalizations of the usual parton densities. The full theorem applies to all kinds of mesons and not just to vector mesons. The parton densities used include not only the ordinary parton density, but also the helicity density (g{sub 1} or {Delta}q) and the transversity density (h{sub 1} or {delta}q), and these can be probed by measuring the polarization of the produced mesons with unpolarized protons. {copyright} {ital 1997} {ital The American Physical Society}},
doi = {10.1103/PhysRevD.56.2982},
journal = {Physical Review, D},
number = 5,
volume = 56,
place = {United States},
year = {1997},
month = {9}
}