Accessing proton generalized parton distributions and pion distribution amplitudes with the exclusive pion-induced Drell-Yan process at J-PARC

Understand

Generalized parton distributions (GPDs) encoding multidimensional information of hadron partonic structure appear as the building blocks in a factorized description of hard exclusive reactions.

• The nucleon GPDs have been accessed by deeply virtual Compton scattering and deeply virtual meson production with lepton beam.
• A complementary probe with hadron beam is the exclusive pion-induced Drell-Yan process.
• In this paper, we discuss recent theoretical advances on describing this process in terms of nucleon GPDs and pion distribution amplitudes.