J/ψ transverse momentum distribution in high energy nuclear collisions
Abstract
The transverse momentum (p) 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 p suppression in central collisions, the gluon multi-scattering in the initial stage leads to a high p enhancement, and the regeneration populates J/ψs at low p region and induces a minimum in R(p). These three phenomena are indeed observed in both 200 GeV Cu + Cu and Au + Au collisions at RHIC energy.
- Publication:
-
Physics Letters B
- Pub Date:
- July 2009
- DOI:
- 10.1016/j.physletb.2009.06.006
- arXiv:
- arXiv:0901.2757
- Bibcode:
- 2009PhLB..678...72L
- Keywords:
-
- 25.75.-q;
- 12.38.Mh;
- 24.85.+p;
- Relativistic heavy-ion collisions;
- Quark-gluon plasma;
- Quarks gluons and QCD in nuclei and nuclear processes;
- Nuclear Theory
- E-Print:
- 7 pages, 3 figures, final version, accepted by Phys. Lett. B