Nuclear absorption and anomalous J/psi suppression in Pb+Pb collisions
| dc.creator | Chaudhuri, A. K. | |
| dc.date | 2002-07-29 | |
| dc.date.accessioned | 2026-07-07T05:39:13Z | |
| dc.date.available | 2026-07-07T05:39:13Z | |
| dc.description | We have studied the J/psi suppression in 158 GeV/c Pb+Pb collisions at CERN SPS. J/psi production is assumed to be a two step process, (i) formation of c bar{c} pair, which is accurately calculable in QCD and (ii) formation of J/psi meson from the c bar{c} pair, which can be conveniently parameterized. In a pA/AA collision, as the c bar{c} pair pass through the nuclear medium, it gains relative square momentum. As a result, some of the c bar{c} pairs can gain enough momentum to cross the threshold to become open charm meson, leading to suppression in pA/AA collisions. The model without any free parameter could describe the of NA50 data on centrality dependence of the ratio's; J/psi over Drell-Yan, J/psi over minimum bias and also the Drell-Yan over minimum bias. The model was used to predict J/psi suppression at RHIC energy. At RHIC energy, hard processes may be important. With hard processes included, J/psi's are strongly suppressed, in agreement with other model calculations. We also show that centrality dependence of J/psi over minimum bias ratio can be used to determine the fraction of hard processes in the collision. | |
| dc.description | 10 pages, 8 figures | |
| dc.identifier | https://arxiv.org/abs/nucl-th/0207082 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/0207082 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/81881 | |
| dc.subject | Nuclear Theory | |
| dc.title | Nuclear absorption and anomalous J/psi suppression in Pb+Pb collisions | |
| dc.type | text |