A phenomenological study of helicity amplitudes of high energy exclusive leptoproduction of the rho meson
Résumé
We apply a previously developped scheme to consistently include the twist 3 distribution amplitudes for transversely polarized rho meson to evaluate in the framework of kT factorization the helicity amplitudes for exclusive leptoproduction of a light vector meson, at leading order in alphaS. We compare our results with high energy experimental data for the ratios of helicity amplitudes T11 /T00 and T01 /T00 and get a good description of the data.