Upsilon photoproduction at HERA compared to estimates of perturbative QCD
arXiv:hep-ph/9901420 · doi:10.1016/S0370-2693(99)00415-3
Abstract
We estimate the cross section for gamma p -> Upsilon p by two independent methods. First, by studying the corrections to the naive leading-order QCD formula and, second, by using parton-hadron duality. The estimates are in good agreement with each other and with the recent measurements of the cross section at HERA.
9 pages, LaTeX, one figure