Secondary Charmonium Production in Heavy Ion Collisions at LHC Energy

We consider the production of charmonium by DD̄ annihilation during the mixed and hadronic phase of a Pb-Pb collision at LHC energy. The calculations for secondary J/ψ and ψ production are performed within a kinetic model taking into account the spacetime evolution of a longitudinally and transversely expanding medium. It is shown that the yield of secondary J/ψ mesons depends strongly on the J/ψ dissociation cross section with co-moving hadrons. Within the most likely scenario for the dissociation cross section it will be negligible. The secondary production of ψ mesons, however, due to their large cross section above the threshold, can substantially exceed the primary yield.