Speaker
Wolfgang Schaefer
Description
We discuss the role of $c \bar c g$-Fock states in the diffractive photoproduction of J/ψ-mesons on heavy nuclei. We build on our earlier description of the process in the color-dipole approach, where we took into account the rescattering of $c \bar c$ pairs using a Glauber-Gribov form of the dipole-nucleus amplitude. The results of our calculations are compared to recent data on the photoproduction of J/ψ by the ALICE and LHCb collaborations. We argue that our results can be interpreted as a model calculation of shadowing in the gluon distribution of a heavy nucleus at a low factorization scale.
Primary authors
Agnieszka Łuszczak
(Cracow University of Technolog & DESY Hamburg)
Wolfgang Schaefer
