High energy rho meson leptoproduction
Abstract
We investigate the longitudinal and transverse polarized cross-sections of the leptoproduction of the rho meson in the high energy limit. Our model is based on the computation of the impact factor gamma*(lambda_gamma) -> rho(lambda_rho) using the twist expansion in the forward limit and expressed in the impact parameter space. This treatment involves in the final stage the twist 2 and twist 3 distribution amplitudes (DAs) of the rho meson and the dipole scattering amplitude. Taking models that exist for the DAs and for the dipole cross-section, we get a phenomenological model for the helicity amplitudes, we compare our predictions with HERA data and get a fairly good description for large enough virtualities of the photon.
Cite
@article{arxiv.1309.6332,
title = {High energy rho meson leptoproduction},
author = {A. Besse and L. Szymanowski and S. Wallon},
journal= {arXiv preprint arXiv:1309.6332},
year = {2013}
}
Comments
6 pages, 3 figures, proceedings of the International Workshop on Low X Physics, May 30 - June 4 2013, Rehovot and Eilat, Israel