J/psi Transverse Momentum Distribution in High Energy Nuclear Collisions at RHIC

The transverse momentum (pt) dependence of J/ψ production in heavy ion collisions is investigated in a transport model with both initial production and continuous regeneration of charmonia. The competition between the two production mechanisms results in a pt suppression in central collisions, the gluon multi-scattering in the initial stage leads to a high pt enhancement, and the regeneration populates J/ψ s at low pt region and induces a minimum in RAA(pt) . These three phenomena are indeed observed in both 200 GeV Cu + Cu and Au + Au collisions at RHIC energy.

Note:

7 pages, 3 figures, final version, accepted by Phys. Lett. B

24.85.+p
12.38.Mh
25.75.-q
heavy ion: scattering
copper
gold
J/psi(3100): hadroproduction
J/psi(3100): suppression
transverse momentum: momentum spectrum
transport theory

References(0)

Figures(3)

Loading ...