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Title: Deeply Virtual Compton Scattering Beam-Spin Asymmetries

Abstract

The beam spin asymmetries in the hard exclusive electroproduction of photons on the proton (ep -> epg) were measured over a wide kinematic range and with high statistical accuracy. These asymmetries result from the interference of the Bethe-Heitler process and of deeply virtual Compton scattering. Over the whole kinematic range (x_B from 0.11 to 0.58, Q^2 from 1 to 4.8 GeV^2, -t from 0.09 to 1.8 GeV^2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, A = a*sin(phi)/[1+c*cos(phi)]. This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.

Authors:
;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
922528
Report Number(s):
JLAB-PHY-07-767; DOE/OR/23177-0294; arXiv:0711.4805
TRN: US0801149
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Journal Article
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCURACY; COMPTON EFFECT; ELECTROPRODUCTION; NUCLEONS; PHOTONS; PROTONS; QUARKS; SPIN; VALENCE

Citation Formats

Girod, F X, and Niyazov, R A. Deeply Virtual Compton Scattering Beam-Spin Asymmetries. United States: N. p., 2008. Web.
Girod, F X, & Niyazov, R A. Deeply Virtual Compton Scattering Beam-Spin Asymmetries. United States.
Girod, F X, and Niyazov, R A. 2008. "Deeply Virtual Compton Scattering Beam-Spin Asymmetries". United States. https://www.osti.gov/servlets/purl/922528.
@article{osti_922528,
title = {Deeply Virtual Compton Scattering Beam-Spin Asymmetries},
author = {Girod, F X and Niyazov, R A},
abstractNote = {The beam spin asymmetries in the hard exclusive electroproduction of photons on the proton (ep -> epg) were measured over a wide kinematic range and with high statistical accuracy. These asymmetries result from the interference of the Bethe-Heitler process and of deeply virtual Compton scattering. Over the whole kinematic range (x_B from 0.11 to 0.58, Q^2 from 1 to 4.8 GeV^2, -t from 0.09 to 1.8 GeV^2), the azimuthal dependence of the asymmetries is compatible with expectations from leading-twist dominance, A = a*sin(phi)/[1+c*cos(phi)]. This extensive set of data can thus be used to constrain significantly the generalized parton distributions of the nucleon in the valence quark sector.},
doi = {},
url = {https://www.osti.gov/biblio/922528}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 24 00:00:00 EST 2008},
month = {Thu Jan 24 00:00:00 EST 2008}
}