Eur. Phys. J. A (2016) 52: 33
https://doi.org/10.1140/epja/i2016-16033-2

Regular Article - Theoretical Physics

Timelike Compton scattering off the neutron and generalized parton distributions

¹ Institut de Physique Nucléaire d’Orsay, CNRS-IN2P3, Université Paris-Sud, 91406, Orsay, France
² Institut für Kernphysik and PRISMA Cluster of Excellence, Johannes Gutenberg Universität, Mainz, Germany

^* e-mail: guidal@ipno.in2p3.fr

Received: 24 October 2015
Accepted: 18 January 2016
Published online: 23 February 2016

Abstract

We study the exclusive photoproduction of an electron-positron pair on a neutron target in the Jefferson Lab energy domain. The reaction consists of two processes: the Bethe-Heitler and the Timelike Compton Scattering. The latter process provides potentially access to the Generalized Parton Distributions (GPDs) of the nucleon. We calculate all the unpolarized, single- and double-spin observables of the reaction and study their sensitivities to GPDs.