18-23 March 2018
Florianopolis, Brazil
America/Sao_Paulo timezone

Exclusive photoproduction J/Ψ in peripheral Pb-Pb

19 Mar 2018, 16:00
Florianopolis, Brazil

Florianopolis, Brazil


M.Beatriz Gay Ducati (UFRGS)


The exclusive photoproduction of the heavy vector mesons J/Ψ is investigated in the context of peripheral lead-lead collisions for the energies available at the LHC, s=2.76  TeV and s=5.02  TeV. Using the light-cone color dipole formalism, the rapidity distribution was calculated in two centrality bins at 50%–70% and 70%–90% in order to evaluate its robustness in extrapolating down to a smaller impact parameter. A modified photon flux is introduced, without change in the photonuclear cross section in relation to the ultraperipheral (UPC) case. Results were obtained for the two regions analyzed, which presented a maximum difference of 27% in frontal rapidity for the two regions. Comparing the results for s=2.76  TeV and s=5.02  TeV, an increase was verified of approximately half the one obtained in the ultraperipheral regime in the central rapidity region.

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