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arXiv · 1602.01774

Revealing transversity GPDs through the photoproduction of a photon and a $ρ$ meson

R. Boussarie·B. Pire·L. Szymanowski·S. Wallon
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Abstract

Photoproduction of a pair of particles with large invariant mass is a natural extension of collinear QCD factorization theorems which have been much studied for deeply virtual Compton scattering and deeply virtual meson production. We discuss the production of a photon and a meson, where the wide angle Compton scattering on a meson subprocess factorizes from generalized parton distribution. We calculate at dominant twist and leading order in $α_s$, the production cross-section of a transversely polarized $ρ$ meson which is sensitive to chiral-odd GPDs, and show that it may be measurable in near future JLab experiments.

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R. Boussarie, B. Pire, L. Szymanowski, S. Wallon. 2016-02-19. Revealing transversity GPDs through the photoproduction of a photon and a $ρ$ meson. https://doi.org/10.1051/epjconf%2F201611201006

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