Extracting the Proton ubar content from pp->Direct Photon plus Jet Cross Sections
Abstract
An analysis procedure is proposed to measure the antiquark distributions in the proton over the region 0.01 < x < 0.1. The procedure involves the measurement of high p_t asymmetric direct photon and jet final states in pp interactions. This measurement can be made at the RHIC collider running in pp mode at an energy of sqrt(s)=500 GeV/c. This analysis identifies a region of phase space where the contribution from quark-antiquark annihilation uncharacteristically approaches the magnitude of the contribution from the leading process, quark-gluon Compton scattering. The forward-backward angular asymmetry in the parton center of mass is sensitive to the antiquark content of the proton and the ubar parton density function can be extracted.
Cite
@article{arxiv.hep-ph/9704252,
title = {Extracting the Proton ubar content from pp->Direct Photon plus Jet Cross Sections},
author = {R. G. Badalian and S. Heppelmann},
journal= {arXiv preprint arXiv:hep-ph/9704252},
year = {2009}
}
Comments
21 pages, 7 figures