Electroproduction of a light neutral vector meson 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 (NLO) for the production of vector mesons, $V={\rho }^0,\omega ,\varphi$.

Comments: 5 pages, Prepared for the proceedings of the X-th International Workshop on High Energy Spin Physics, JINR Dubna, Sept. 16 - 20, 2003; typos in eq.(13) are corrected