Speaker
Description
We study the $J/\psi$ photoproduction in ultrarelativistic lead-lead collisions at the LHC energy. In the present approach, as an example, we use a simple model based on a vector dominance picture and multiple scattering of the hadronic (cc̄) state in a cold nucleus. Equivalent photon approximation in the impact parameter space, which successfully describes data for ultraperipheral processes, is used for more central heavy-ion collision. For semi-central collisions ($b < R_{Pb}+R_{Pb}$), a modification of the photon flux seems necessary. We discuss different physics-motivated approximations. We try to estimate the cross sections for different centrality bins and $J/\psi$ mesons emitted in the forward rapidity range ($2.5 < y < 4$) corresponding to ALICE experimental results. Reasonable results will be presented but open questions will also be discussed.
Photoproduction of $J/\psi$ mesons in peripheral and semicentral heavy ion collisions,
Mariola Kłusek-Gawenda and Antoni Szczurek,
Published in: Phys.Rev. C93 (2016) 4, 044912.
