Double ratio of charmonia in p+Pb collisions at sqrt(s_NN)=5.02 TeV

TL;DR

This paper investigates the suppression of the double ratio of charmonia in p+Pb collisions at 5.02 TeV, considering both cold and hot nuclear matter effects using a kinetic model and hydrodynamics.

Contribution

It introduces a kinetic model combined with 2+1D hydrodynamics to study charmonia suppression in p+Pb collisions, including hot nuclear matter effects.

Findings

Double ratio significantly suppressed in central collisions.

Hot nuclear matter effects play a crucial role in charmonia suppression.

Cold nuclear matter effects alone are insufficient to explain the suppression.

Abstract

Based on a kinetic description of J/psi dissociation and production in an expanding quark-gluon plasma that is described by a 2+1 dimensional ideal hydrodynamics, we have studied the double ratio R_{p Pb}(psi')/R_{p Pb}(J/psi) of charmonia in p+Pb collisions at sqrt(s_NN)=5.02 TeV by including not only the cold nuclear matter effects but also the hot nuclear matter effects. We find that the double ratio of prompt charmonia is significantly suppressed in the most central collisions as a result of the hot nuclear matter effects.