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arXiv · 1309.0616

A model for high energy rho meson leptoproduction based on collinear factorization and dipole models

A. Besse·L. Szymanowski·S. Wallon
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Abstract

We present a phenomenological model for the helicity amplitudes T11 and T00 of the rho meson exclusive diffractive leptoproduction in the forward limit. This model leads to a very good description of the polarized cross-sections sigmaT and sigmaL when compared to HERA data. This model is based on the impact factor representation of the helicity amplitudes. The gamma* -> rho impact factor is computed within the light-cone collinear factorization scheme, the impact parameter space representation allowing to factorize out the dipole-target amplitude. Finally our description combines a model for the dipole-target amplitude that includes the saturation effects with the results for the impact factor where the twist 2 and twist 3 distribution amplitudes of the rho meson are involved.

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A. Besse, L. Szymanowski, S. Wallon. 2013-09-03. A model for high energy rho meson leptoproduction based on collinear factorization and dipole models. https://arxiv.org/abs/1309.0616

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