Deeply Virtual Compton Scattering Beam-Spin Asymmetries
High Energy Physics - Experiment
2019-08-13 v3 High Energy Physics - Phenomenology
Nuclear Experiment
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.
Keywords
Cite
@article{arxiv.0711.4805,
title = {Deeply Virtual Compton Scattering Beam-Spin Asymmetries},
author = {F. X. Girod and R. A. Niyazov et al},
journal= {arXiv preprint arXiv:0711.4805},
year = {2019}
}
Comments
1 tex file (6 pages), 4 (eps) figures