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Exclusive photoproduction of lepton pairs at LHC

✍ Scribed by B. Pire; L. Szymanowski; J. Wagner

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
238 KB
Volume
179-180
Category
Article
ISSN
0920-5632

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✦ Synopsis

Exclusive photoproduction of dileptons, Ξ³p β†’ + -p, will be measured in ultraperipheral collisions at LHC. The mechanism where the lepton pair comes from a heavy timelike photon radiated from a quark interferes with the pure QED process Ξ³Ξ³ β†’ + -. As an analog of deeply virtual Compton scattering, this timelike Compton scattering is a way to study generalized parton distributions in the nucleon or the nucleus. High energy kinematics will enable to focus on gluon distributions. Nuclear effects may be scrutinized in heavy-ion collisions.

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