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Timelike Compton scattering: exclusive photoproduction of lepton pairs.

Authors :
Berger, E.R.
Diehl, M.
Pire, B.
Source :
European Physical Journal C -- Particles & Fields; Apr2002, Vol. 23 Issue 4, p675-689, 15p
Publication Year :
2002

Abstract

We investigate the exclusive photoproduction of a heavy timelike photon which decays into a lepton pair, $\gamma p\to \ell^+\!\ell^- p$. This can be seen as the analog of deeply virtual Compton scattering, and we argue that the two processes are complementary for studying generalized parton distributions in the nucleon. In an unpolarized experiment the angular distribution of the leptons readily provides access to the real part of the Compton amplitude. We estimate the possible size of this effect in kinematics where the Compton process should be dominated by quark exchange. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
14346044
Volume :
23
Issue :
4
Database :
Complementary Index
Journal :
European Physical Journal C -- Particles & Fields
Publication Type :
Academic Journal
Accession number :
49886038
Full Text :
https://doi.org/10.1007/s100520200917