Speaker
Jaroslav Adam
(FNSPE CTU in Prague)
Description
The strong electromagnetic fields generated by ultra-relativistic heavy ions 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).
As exclusive photoproduction of vector mesons is sensitive to the gluon distribution of the interacting target it
allows one to study saturation and shadowing phenomena.
Here we report on the ALICE measurement of vector meson photoproduction in p-Pb UPC at sqrt(s_NN) = 5.02 TeV.
In these asymmetric collisions, the photon is most likely coming from the Pb nucleus. As a result, the center-of-mass energy
of the photon-proton system is constrained by the the rapidity of the vector meson which is measured in the laboratory frame
with respect to the proton beam direction. We present the results on vector meson photoproduction in several intervals
of the photon-proton center-of-mass energy.
Primary author
Jaroslav Adam
(FNSPE CTU in Prague)
