Sequential melting of charmonium states in an expanding Quark Gluon Plasma and $J/ψ$ suppression at RHIC and LHC energy collisions
| dc.creator | Chaudhuri, A. K. | |
| dc.date | 2008-04-09 | |
| dc.date | 2008-07-04 | |
| dc.date.accessioned | 2026-07-07T11:49:43Z | |
| dc.date.available | 2026-07-07T11:49:43Z | |
| dc.description | We have developed a hydrodynamic model to study sequential melting of charmonium states in an expanding QGP medium. According to the initial fluid temperature profile, $J/ψ$'s are randomly distributed in the transverse plane. As the fluid evolve in time, the free streaming $J/ψ$'s are suppressed if the local fluid temperature exceed a critical temperature. PHENIX data on the centrality dependence of $J/ψ$ suppression in Au+Au collisions at mid-rapidity are explained by sequential melting of the charmonium states, $χ_c$, $ψ\prime$ and $J/ψ$, in the expanding medium. The critical temperatures $T_{J/ψ} \approx2.09T_c$ and $T_χ=T_{χ_c}=T_{ψ\prime} \approx 1.1T_c$ agree with lattice motivated calculations. The feed-down fraction $F$ depend on whether the cold nuclear matter effect is included or not. It changes from $F=0.3$ with cold nuclear matter effect included to $F=0.5$ when the effect is neglected. Model fails to reproduce the PHENIX data on the centrality dependence of $J/ψ$ suppression in Cu+Cu collisions at mid-rapidity, indicating that the mechanism of $J/ψ$ suppression is different in Au+Au and in Cu+Cu collisions. We also use the model to predict for the centrality dependence of $J/ψ$ suppression in Pb+Pb collisions at LHC energy, $\sqrt{s}$=5500 GeV. In LHC energy, $J/ψ$'s are more suppressed in mid central collisions than in Au+Au collisions at RHIC energy. | |
| dc.description | 9 pages, 9 figures. Revised version to be published in J. Phys. G | |
| dc.identifier | https://arxiv.org/abs/0804.1455 | |
| dc.identifier | http://arxiv.org/abs/0804.1455 | |
| dc.identifier | J.Phys.G35:095107,2008 | |
| dc.identifier | doi:10.1088/0954-3899/35/9/095107 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/203336 | |
| dc.subject | Nuclear Theory | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Sequential melting of charmonium states in an expanding Quark Gluon Plasma and $J/ψ$ suppression at RHIC and LHC energy collisions | |
| dc.type | text |