Speaker
Mr
Michal Broz
(Comenius University)
Description
Vector mesons are copiously produced in ultra-peripheral collisions(UPC).
In these collisions, the impact parameter is larger than the sum of the nuclear radii, implying that electromagnetic processes become dominant.
The cross section for heavy vector meson production is expected to be sensitive to the gluon distribution and can therefore probe nuclear gluon shadowing (Pb-Pb) and the gluon structure function in the nucleon (p-Pb).
The ALICE Collaboration has performed the first measurements of the $\rho^{0}$, J/$\psi$ and $\psi$(2S) UPC cross section in Pb-Pb collisions and that for exclusive J/$\psi$ photoproduction off protons in ultra-peripheral proton-lead collisions at the LHC.
Primary author
Mr
Michal Broz
(Comenius University)
