Timelike Compton Scattering in Ultraperipheral Collisions

Details Timelike Compton Scattering in Ultraperipheral Collisions Timelike Compton Scattering in Ultraperipheral Collisions

2009-06-29

arxiv.org/abs/0906.5256v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

To appear in the proceedings of DIS 2009 Conference, 26-30 April 2009, Madrid

Scientific paper

Exclusive photoproduction of dileptons, gamma N ->l+l- N, is and will be measured in ultraperipheral collisions at hadron colliders. We demonstrate that the timelike deeply virtual Compton scattering (TCS) mechanism gamma q -> l+l- q, where the lepton pair comes from the subprocess gamma q -> gamma* q, dominates in some accessible kinematical regions, thus opening a new way to study generalized parton distributions (GPD) in the nucleon at small skewedness.

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