Exclusive photoproduction of a photon pair with a large invariant mass

Apr 11, 2019, 9:38 AM
17m
Rettorato - Aula Principi d'Acaja

Rettorato - Aula Principi d'Acaja

via Verdi, 8 Turin
Parallel Session Talk WG6: Spin and 3D structure WG6: Spin and 3D structure

Speaker

Aleksandra Pędrak (National Centre for Nuclear Research, Warsaw, Poland)

Description

The electromagnetic probe has proven to be a very efficient way to access the three-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 asymmetry triggered by a linearly polarized photon beam.

Primary authors

Aleksandra Pędrak (National Centre for Nuclear Research, Warsaw, Poland) Prof. Bernard Pire (Centre de Physique Théorique, École Polytechnique, CNRS, 91128 Palaiseau, France) Prof. Lech Szymanowski (National Centre for Nuclear Research,Warsaw, Poland) Dr Jakub Wagner (National Centre for Nuclear Research, Warsaw, Poland)

Presentation materials