Ponente
Sr.
Jaroslav Adam
(Czech Technical University in Prague)
Descripción
Ultra-relativistic heavy ions generate strong electromagnetic fields which
offer the possibility to study gamma-gamma, gamma-nucleus and gamma-proton
processes at the LHC in ultra-peripheral Pb-Pb and p-Pb collisions (UPC).
Exclusive photoproduction of J/psi vector mesons is sensitive to
the gluon distribution of the interacting target (proton or nucleus).
The reactions allow one to study saturation phenomena and nuclear gluon shadowing.
Here we report on the ALICE measurement of J/psi coherent and incoherent
photoproduction in Pb-Pb UPC at sqrt(s_NN) = 2.76 TeV at forward
and central rapidity. Furthermore, we present also results
on the J/psi photoproduction in p-Pb UPC at sqrt(s_NN) = 5.02 TeV
in the forward and backward rapidities, where the rapidity
is measured in the laboratory frame with respect to the proton beam direction.
The J/psi's have been identified through their leptonic decays.
Autor primario
Sr.
Jaroslav Adam
(Czech Technical University in Prague)
