Small x gluon from exclusive J/psi production
High Energy Physics - Phenomenology
2008-11-26 v1
Abstract
Exclusive J/psi production, gamma* p -> J/psi p, offers a unique opportunity to determine the gluon density of the proton in the small x domain. We use the available HERA data to determine the gluon distribution in the region 10^{-4} <~ x <~ 10^{-2} and 2 <~ Q^2 <~ 10 GeV^2, where the uncertainty on the gluon extracted from the global parton analyses is large. The gluon density is found to be approximately flat at the lower scale; it is compared with those of recent global analyses.
Keywords
Cite
@article{arxiv.0709.4406,
title = {Small x gluon from exclusive J/psi production},
author = {A. D. Martin and C. Nockles and M. Ryskin and T. Teubner},
journal= {arXiv preprint arXiv:0709.4406},
year = {2008}
}
Comments
13 pages, 5 figures