Photoproduction of $J/\psi$ and ${\rm Y}$ in pp and $\bar{p}p$ Collisions

Abstract

Exclusive vector meson photoproduction, $pp\to ppV$ and $\bar{p}p\to \bar{p}pV$ occurs with significant rates at hadron colliders. The reaction can be used to study the gluon distribution of protons. Vector mesons may be produced with either proton as a target; because of interference between the two production channels, the $p_T$ spectra of vector mesons produced in $pp$ and $\bar{p}p$ collisions are quite different. Because of the unique event signature, vector meson photoproduction can be separated from hadroproduction events, despite the small ratio of cross sections. We consider production of $J/\psi$ and ${\rm Y}$ at RHIC, the Tevatron and the LHC.

Comments: Typos in references fixed Presented at "Small-x and Diffraction 2003, Sept. 17-20, 2003, Fermilab. 5 pages with 2 figures