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arXiv · 1109.5050

On high energy exclusive leptoproduction of the rho meson up to twist 3

I. V. Anikin·A. Besse·D. Yu. Ivanov·B. Pire·L. Szymanowski·S. Wallon
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Abstract

The Regge inspired k_T-factorization scheme expresses the scattering amplitude for exclusive leptoproduction of a light vector meson rho in terms of two impact factors, one for the gamma* - rho transition and the other one for the nucleon to nucleon transition, with, at leading order, a two "reggeized" gluon exchange in the t-channel. We report here on a recent phenomenological study where we apply a previously developped scheme which consistently takes into account the twist 3 distribution amplitudes for transversely polarized rho meson. The computation of the gamma* to rho impact factor are performed within collinear factorization of QCD, up to the twist 3 level, based on the Collinear Factorization scheme applied to the amplitudes gamma*g to g rho . Our results are in good agreement with high energy experimental data for the ratios of helicity amplitudes.

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I. V. Anikin, A. Besse, D. Yu. Ivanov, B. Pire, L. Szymanowski, S. Wallon. 2011-09-23. On high energy exclusive leptoproduction of the rho meson up to twist 3. https://arxiv.org/abs/1109.5050

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