Vector meson electroproduction at next-to-leading order

Abstract

The process of a light neutral vector meson electroproduction is studied in the framework of QCD factorization in which the amplitude factorizes in a convolution of the nonperturbative meson distribution amplitude and the generalized parton densities with the perturbatively calculable hard-scattering amplitudes. We derive a complete set of hard-scattering amplitudes at next-to-leading order for the production of vector mesons, $V={\rho }^0,\omega ,\varphi$.

latex, 6 pages, with corrected Eq. (12) and added remark on dimensional regularisation

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