Speaker
Mrs
Marie Boer
(Institut de Physique Nucleaire d'Orsay)
Description
We present our studies of the Timelike Compton Scattering (TCS) process
off the nucleon (gamma N -> N gamma* -> e+e-). At sufficiently large virtuality of
the nal state photon, this reaction provides access, via a QCD factorization
theorem, to the Generalized Partons Distributions (GPDs) of the nucleon.
GPDs contain, in particular, informations about the correlations between
the longitudinal momentum and the transverse spatial distributions of the
partons inside the nucleon, which are curently largely unknown.
Using several modellings of GPDs, we have calculated all single and double
beam and target polarization observables, for proton and neutron targets.
This is of particular interest in view of the coming 12 GeV JLab upgrade
where a complete experimental TCS program can be envisaged, in complement
of the currently approved DVCS (Deep Virtual Compton Scattering:
eN to eNgamma ) program aiming at extracting GPDs.
Primary author
Mrs
Marie Boer
(Institut de Physique Nucleaire d'Orsay)
