Speaker
Prof.
Guillermo Contreras
(CVUT Prague)
Description
Ultra-relativistic heavy ions generate strong electromagnetic fields which offer the possibility to study, at the LHC, gamma-nucleus processes in PbPb collisions and gamma-proton processes in pPb collisions. These events are called ultra-peripheral collisions (UPC). The photoproduction of J/Psi vector mesons in PbPb (pPb) UPC is sensitive to the gluon distribution of the interacting nuclei (proton).
Here we report on the ALICE measurement of the cross section for J/Psi coherent
photoproduction measured in PbPb UPC at sqrt(s_NN) = 2.76 TeV for the rapidity ranges -3.6<y<-2.6 and |y|<0.9, where the J/Psi has been identified through its leptonic decays. Furthermore, we present first results on the photoproduction
of J/Psi in pPb UPC at sqrt(s_NN) = 5.02 TeV
Primary author
Prof.
Guillermo Contreras
(CVUT Prague)
