Exclusive photoproduction of a heavy vector meson in QCD

Abstract

The process of exclusive heavy vector meson photoproduction, gamma p -> V p, is studied in the framework of QCD factorization. The mass of the produced meson, V = Upsilon or J/Psi, provides a hard scale for the process. We demonstrate, that in the heavy quark limit and at the one-loop order in perturbation theory, the amplitude factorizes in a convolution of a perturbatively calculable hard-scattering amplitude with the generalized parton densities and the nonrelativistic QCD matrix element <O_1>_V. We evaluate the hard scattering amplitude at one-loop order and compare the data with theoretical predictions using an available model for generalized parton distributions.

37 pages, LATEX, 17 figures, the version corrected according to the erratum Eur.Phys.J. C75 (2015) 2, 75 and eqs. (2.21), (3.96), (3.97)

References in corpus (1)

• Electroproduction of a light neutral vector meson at next-to-leading order

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