title: Gluon saturation effects on J / psi production in heavy ion collisions.
abstract: We consider a novel mechanism for J / psi production in nuclear collisions arising due to the high density of gluons. The resulting J / psi production cross section is evaluated as a function of rapidity and centrality. We compute the nuclear modification factor and show that the rapidity distribution of the produced J / psi's is significantly more narrow in AA collisions due to the gluon saturation effects. Our results indicate that gluon saturation in the colliding nuclei is a significant source of J / psi suppression and can explain the experimentally observed rapidity and centrality dependencies of the effect.
authors.affiliation: Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
authors.forename: Dmitri
authors.initials: D
authors.lastname: Kharzeev
authors.forename: Eugene
authors.initials: E
authors.lastname: Levin
authors.forename: Marzia
authors.initials: M
authors.lastname: Nardi
authors.forename: Kirill
authors.initials: K
authors.lastname: Tuchin