Upsilon photoproduction at HERA compared to estimates of perturbative QCD
A. D. Martin, M. G. Ryskin, T. Teubner
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.
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