Abstract
The Regge inspired kT -factorization scheme expresses the scattering amplitude for exclusive leptoproduction of a light vector meson ρ in terms of two impact factors, one for the γ∗−ρ 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 [1] where we apply a previously developped scheme [2] which consistently takes into account the twist 3 distribution amplitudes for transversely polarized ρ meson. The computation of the γ∗→ ρ 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 γ(λγ)g(k)→ g(r− k)ρ(λρ). Our results are in good agreement with high energy experimental data for the ratios of helicity amplitudes.
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