Amplitudes ratios in ${\rho }^0$ leptoproductions and GPDs

Abstract

We investigate exclusive leptoproduction of ${\rho }^0$ meson. These reactions were analyzed within the factorizing handbag approach. In our model good agreement of observables for light meson production with experimental data in a wide energy range was found. Using the model results we calculate the ratio of different helicity amplitudes for a transversely polarized proton target to the leading twist longitudinal amplitude. Our results are close to the amplitude ratios measured by HERMES.

6 pages, 5 figures, International Baldin Seminar Relativistic Nuclear Physics and Quantum Chromodynamics, Dubna, September, 2016

References in corpus (5)

• Transverse spin structure of the nucleon from lattice QCD simulations
• Spin Density Matrix Elements in Exclusive rho^0 Electroproduction on 1H and 2H Targets at 27.5 GeV Beam Energy
• The pion pole in hard exclusive vector-meson leptoproduction
• Ratios of Helicity Amplitudes for Exclusive rho-0 Electroproduction
• Exclusive $\omega$ meson muoproduction on transversely polarised protons