Can one measure timelike Compton scattering at LHC ? - Archive ouverte HAL
Article Dans Une Revue Physical Review D Année : 2009

Can one measure timelike Compton scattering at LHC ?

Résumé

Exclusive photoproduction of dileptons, gamma N->e+e-N, is and will be measured in ultraperipheral collisions at hadron colliders, such as the Tevatron, RHIC and the LHC . We demonstrate that the timelike deeply virtual Compton scattering (TCS) mechanism gamma q -> e+e- 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. High energy kinematics enables to probe parton distributions at small skewedness. This subprocess interferes at the amplitude level with the pure QED subprocess gamma gamma* -> e+e- where the virtual photon is radiated from the nucleon.

Dates et versions

hal-00336421 , version 1 (04-11-2008)

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Citer

B. Pire, L. Szymanowski, J. Wagner. Can one measure timelike Compton scattering at LHC ?. Physical Review D, 2009, 79, pp.014010. ⟨hal-00336421⟩
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