22-28 July 2010
Palais des Congrès de Paris
Europe/Paris timezone

On chiral-odd Generalized Parton Distributions

22 Jul 2010, 09:20
8m
Salle 251 ()

Salle 251

Parallel Session Talk 04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy 04 - Hadronic Structure, Parton Distributions, soft QCD, Spectroscopy

Speaker

Samuel Wallon (LPT, Université Paris-Sud, CNRS, Orsay and UPMC Univ. Paris 06)

Description

The chiral-odd transversity generalized parton distributions of the nucleon can be accessed experimentally through the exclusive photoproduction process gamma + N -> pi + rho + N', in the kinematics where the meson pair has a large invariant mass and the final nucleon has a small transverse momentum, provided the vector meson is produced in a transversally polarized state. Estimated counting rates show that the experiment is feasible with real or quasi real photon beams expected at JLab@12 GeV and in the COMPASS experiment. (Phys Letters B688,154,2010) In addition, a consistent classification of the chiral-odd pion GPDs beyond the leading twist 2 is presented. Based on QCD equations of motion and on the invariance under rotation on the light-cone of any scattering amplitude involving such GPDs, we reduce the basis of these chiral-odd GPDs to a minimal set.

Primary author

Samuel Wallon (LPT, Université Paris-Sud, CNRS, Orsay and UPMC Univ. Paris 06)

Co-authors

Bernard Pire (CPhT, Ecole Polytechnique, Palaiseau) Lech Szymanowski (Soltan INS, Warsaw)

Presentation Materials