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

Title: DVCS amplitude with kinematical twist-3 terms

Abstract

The authors compute the amplitude of deeply virtual Compton scattering (DVCS) using the calculus of QCD string operators in coordinate representation. To restore the electromagnetic gauge invariance (transversality) of the twist-2 amplitude they include the operators of twist-3 which appear as total derivatives of twist-2 operators. The results are equivalent to a Wandzura-Wilczek approximation for twist-3 skewed parton distributions. They find that this approximation gives a finite result for the amplitude of a longitudinally polarized virtual photon, while the amplitude for transverse polarization is divergent, i.e., factorization breaks down in this term.

Authors:
;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
760439
Report Number(s):
JLAB-THY-00-29; DOE/ER/40150-1742; hep-ph/0008214; RUB-TPII-14/00
TRN: US0100884
DOE Contract Number:  
AC05-84ER40150
Resource Type:
Journal Article
Journal Name:
Phys.Lett.B493:332-340,2000
Additional Journal Information:
Journal Volume: B; Journal Issue: 493; Other Information: Submitted to Phys.Lett.B493:332-340,2000; PBD: 1 Aug 2000
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AMPLITUDES; COMPTON EFFECT; FACTORIZATION; GAUGE INVARIANCE; PARTONS; POLARIZATION; QUANTUM CHROMODYNAMICS

Citation Formats

Radyushkin, A V, and Weiss, C. DVCS amplitude with kinematical twist-3 terms. United States: N. p., 2000. Web. doi:10.1016/S0370-2693(00)01155-2.
Radyushkin, A V, & Weiss, C. DVCS amplitude with kinematical twist-3 terms. United States. doi:10.1016/S0370-2693(00)01155-2.
Radyushkin, A V, and Weiss, C. Tue . "DVCS amplitude with kinematical twist-3 terms". United States. doi:10.1016/S0370-2693(00)01155-2. https://www.osti.gov/servlets/purl/760439.
@article{osti_760439,
title = {DVCS amplitude with kinematical twist-3 terms},
author = {Radyushkin, A V and Weiss, C},
abstractNote = {The authors compute the amplitude of deeply virtual Compton scattering (DVCS) using the calculus of QCD string operators in coordinate representation. To restore the electromagnetic gauge invariance (transversality) of the twist-2 amplitude they include the operators of twist-3 which appear as total derivatives of twist-2 operators. The results are equivalent to a Wandzura-Wilczek approximation for twist-3 skewed parton distributions. They find that this approximation gives a finite result for the amplitude of a longitudinally polarized virtual photon, while the amplitude for transverse polarization is divergent, i.e., factorization breaks down in this term.},
doi = {10.1016/S0370-2693(00)01155-2},
journal = {Phys.Lett.B493:332-340,2000},
number = 493,
volume = B,
place = {United States},
year = {2000},
month = {8}
}