Exclusive photoproduction of Upsilon: from HERA to Tevatron
High Energy Physics - Phenomenology
2008-11-26 v2
Abstract
The forward photoproduction amplitude for gamma p to Upsilon p is calculated in a pQCD k_t-factorization approach with an unintegrated gluon distribution constrained by inclusive deep-inelastic structure functions. The total cross section for diffractive Upsilons is compared with a recent HERA data. We also discuss the 2S/1S ratio in diffractive Upsilon-production. The amplitude is used to predict the cross section for exclusive Upsilon production in hadronic reactions. Differential distributions for the exclusive p pbar to p Upsilon pbar process are calculated for Tevatron energies. We also show predictions for LHC. Absorption effects are included.
Keywords
Cite
@article{arxiv.0805.0717,
title = {Exclusive photoproduction of Upsilon: from HERA to Tevatron},
author = {A. Rybarska and W. Schäfer and A. Szczurek},
journal= {arXiv preprint arXiv:0805.0717},
year = {2008}
}
Comments
14 pages, 8 figures; predictions for LHC included