Hard photoproduction of a diphoton with a large invariant mass

A. Pedrak, B. Pire, L. Szymanowski, J. Wagner
2017 Physical Review D  
The electromagnetic probe has proven to be a very efficient way to access the $3-$dimensional structure of the nucleon, particularly thanks to the exclusive Compton processes. We explore the hard photoproduction of a large invariant mass diphoton in the kinematical regime where the diphoton is nearly forward and its invariant mass is the hard scale enabling to factorize the scattering amplitude in terms of generalized parton distributions. We calculate unpolarized cross sections and the angular
more » ... ons and the angular asymmetry triggered by a linearly polarized photon beam.
doi:10.1103/physrevd.96.074008 fatcat:cmk7p7ziyrdxnbk3okjrskzjh4