Speaker
Dr
Alessandro Bertolin
(INFN Padova)
Description
The double differential inelastic J/psi photoproduction cross section
as function of the squared transverse momentum of the J/psi in bins of the inelasticity z has been measured in ep collisions with the ZEUS detector at HERA.
An integrated luminosity of 468 pb-1 was used corresponding
to the full data sample collected by the ZEUS experiment.
The events were required to have 0.1 < z < 0.9, pt > 1 GeV and 60 < W < 240 GeV,
where pt is the transverse momentum of the J/psi and W is the photon-proton centre-of-mass energy.
The J/psi mesons were identified through their decay into muon pairs.
The double differential cross section measurements are compared to the most recent theoretical predictions.
Primary author
Dr
Alessandro Bertolin
(INFN Padova)
