Photoproduction of a large invariant mass gamma rho pair at small momentum transfer - Archive ouverte HAL
Communication Dans Un Congrès Année : 2016

Photoproduction of a large invariant mass gamma rho pair at small momentum transfer

Résumé

The collinear factorization framework allows to describe the exclusive photoproduction of a gamma rho pair in the generalized Bjorken regime in terms of a perturbatively calculable coefficient function and universal generalized parton distributions. The kinematics are defined by a large invariant mass of the gamma rho pair and a small transverse momentum of the final nucleon. We calculate the scattering amplitude at leading order in alpha_s and the differential cross sections for the process where the rho-meson is either longitudinally or transversely polarized, in the kinematics of the near future Jlab experiments. Our estimate of the cross section demonstrates that this process is measurable at JLab 12-GeV.

Dates et versions

hal-01368185 , version 1 (19-09-2016)

Identifiants

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R. Boussarie, B. Pire, L. Szymanowski, S. Wallon. Photoproduction of a large invariant mass gamma rho pair at small momentum transfer. XXIV International Workshop on Deep-Inelastic Scattering and Related Subject - DIS 2016, 11-15 April 2016, DESY Hamburg, Germany, Apr 2016, Hambourg, Germany. ⟨hal-01368185⟩
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