Deeply virtual Compton scattering on a virtual pion target

Details Deeply virtual Compton scattering on a virtual pion target Deeply virtual Compton scattering on a virtual pion target

2008-07-28

arxiv.org/abs/0807.4474v1

Eur.Phys.J.C58:179-192,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 9 figures

Scientific paper

10.1140/epjc/s10052-008-0769-1

We study deeply virtual Compton scattering on a virtual pion that is emitted by a proton. Using a range of models for the generalized parton distributions of the pion, we evaluate the cross section, as well as the beam spin and beam charge asymmetries in the leading-twist approximation. Studying Compton scattering on the pion in suitable kinematics puts high demands on both beam energy and luminosity, and we find that the corresponding requirements will first be met after the energy upgrade at Jefferson Laboratory. As a by-product of our study, we construct a parameterization of pion generalized parton distributions that has a non-trivial interplay between the x and t dependence and is in good agreement with form factor data and lattice calculations.

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