The nucleon's transversity and the photon's distribution amplitude probed in lepton pair photoproduction

Details The nucleon's transversity and the photon's distribution amplitude probed in lepton pair photoproduction The nucleon's transversity and the photon's distribution amplitude probed in lepton pair photoproduction

2010-11-03

arxiv.org/abs/1011.0845v1

PoS ICHEP2010:173,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, proceedings of the ICHEP conference, Paris july 2010

Scientific paper

We describe a new way to access the chiral odd transversity parton distribution in the proton through the photoproduction of lepton pairs on transversely polarized target. The basic ingredient is the interference of the Bethe Heitler or Drell-Yan amplitudes with the amplitude of a process, where the photon couples to quarks through its twist-2 chiral-odd distribution amplitude. This approach permits to scan experimentally the shape of the transversity distribution in a nucleon as well as the photon distribution amplitude.

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