A phenomenological study of helicity amplitudes of high energy exclusive leptoproduction of the rho meson

I. V. Anikin (1) , A. Besse (2) , D. Yu. Ivanov (3) , B. Pire (4) , L. Szymanowski (5) , S. Wallon (2, 6)

1 BLTP - Bogoliubov Laboratory of Theoretical Physics [Dubna]
2 LPT - Laboratoire de Physique Théorique d'Orsay [Orsay]
3 Institute of Mathematics
4 CPHT - Centre de Physique Théorique [Palaiseau]
5 Soltan Institute for Nuclear Studies
6 UPMC - Université Pierre et Marie Curie - Paris 6

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.

Domaines: Physique des Hautes Energies - Phénoménologie [hep-ph]

I. V. Anikin, A. Besse, D. Yu. Ivanov, B. Pire, L. Szymanowski, et al.. A phenomenological study of helicity amplitudes of high energy exclusive leptoproduction of the rho meson. Physical Review D, 2011, 84, pp.054004. ⟨10.1103/PhysRevD.84.054004⟩. ⟨hal-00591756⟩