Volume 297 - XXV International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2017) - WG6 Spin and 3D Structure
Probing GPDs in the photoproduction of a of a γ ρ pair
R. Boussarie,* B. Pire, L. Szymanowski, S. Wallon
*corresponding author
Full text: pdf
Pre-published on: 2018 January 03
Published on: 2018 January 16
Abstract
We describe the process $\gamma N → \gamma \rho N′$ in the generalized Bjorken regime where the $\gamma \rho$ pair has a
large invariant mass. In the collinear QCD factorization framework, the amplitude gives access to both chiral-even and chiral-odd quark generalized parton distributions (GPDs), and is insensitive to gluon GPDs. The separation of longitudinally and transversely polarized $\rho$ meson production allows to distinguish chiral-even and chiral-odd contributions. Production rates are estimated in the kinematics of the near-future JLab 12-GeV experiments.
DOI: https://doi.org/10.22323/1.297.0241
Open Access