Exclusive photoproduction of ϒ: From HERA to Tevatron

The forward photoproduction amplitude for γp→ϒpγp→ϒp is calculated in a pQCD k⊥k⊥-factorization approach with an unintegrated gluon distribution constrained by inclusive deep-inelastic structure functions. The total cross section for diffractive ϒ  s is compared with recent HERA data. We also discuss the 2S/1S2S/1S ratio in diffractive ϒ-production. The amplitude is used to predict the cross section for exclusive ϒ   production in hadronic reactions. Differential distributions for the exclusive pp¯→pϒp¯ process are calculated for Tevatron energies. We also show predictions for LHC. Absorption effects are included.