Speaker
Dr
Agnieszka Łuszczak
(Cracow University of Technolog & DESY Hamburg)
Description
We investigate the exclusive photoproduction of J/psi mesons in
ultraperipheral heavy-ion collisions in the color dipole approach. We
use the color dipole formulation of Glauber-Gribov theory to calculate
the diffractive amplitude on the nuclear target.
We discuss the role of $c \bar c g$-Fock states, which can be understood
in terms of the shadowing of the nuclear gluon distribution. We compare
the results of our calculations to recent data on the photoproduction of
$J/\psi$ by the ALICE, LHCb and CMS collaborations. In particular the
$\gamma A \to J/\psi A$ cross section and the putative gluon shadowing
ratio $R(x)$ are improved at small $x$ high energies after including the
$c \bar c g$ state.
| I read the instructions above | Yes |
|---|
Author
Dr
Agnieszka Łuszczak
(Cracow University of Technolog & DESY Hamburg)
