Exclusive photoproduction of Upsilon: from HERA to Tevatron

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.

14 pages, 8 figures; predictions for LHC included

References in corpus (4)

• J/psi, psi' and Upsilon Production at Hadron Colliders: a review
• Exclusive photoproduction of $J/\psi$ in proton-proton and proton-antiproton scattering
• Exclusive J/psi and Upsilon hadroproduction and the QCD odderon
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