arXiv:0911.2611·v1·High Energy Physics — Phenomenology
Transversity Generalized Parton Distributions from gamma N -> pi rhot N' with a Large pi rhot Invariant Mass
M. El Beiyad🇫🇷 · B. Pire🇫🇷 · M. Segond🇩🇪 · L. Szymanowski🇵🇱 · S. Wallon🇫🇷
Abstract
The chiral-odd transversity generalized parton distributions of the nucleon can be accessed experimentally through the exclusive photoproduction process gamma N -> pi rhoT N', with or without beam and target polarization, provided the vector meson is produced in a transversely polarized state. The kinematical domain of factorization is defined through a large invariant mass of the meson pair and a small transverse momentum of the final nucleon. We calculate perturbatively the scattering amplitude at leading order in alpha_s and build a simple model for the dominant transversity GPD H_T(x, xi, t) based on the concept of double distribution. Counting rate estimates are in progress.
Comments: 4 pages, 2 figures, proceedings of the XIII Workshop On High Energy Spin Physics Dubna Spin 2009