Transverse Momentum Spectra of J/ψin Heavy-Ion Collisions
| dc.creator | Zhao, Xingbo | |
| dc.creator | Rapp, Ralf | |
| dc.date | 2007-12-14 | |
| dc.date | 2008-06-09 | |
| dc.date.accessioned | 2026-07-07T11:39:25Z | |
| dc.date.available | 2026-07-07T11:39:25Z | |
| dc.description | We investigate J/ψtransverse-momentum (p_t) distributions and their centrality dependence in heavy-ion collisions at SPS and RHIC within the framework of a two-component model, which includes (i) primordial production coupled with various phases of dissociation, (ii) statistical coalescence of c and \bar{c} quarks at the hadronization transition. The suppression of the direct component (i) is calculated by solving a transport equation for J/ψ, χ_c and ψ' in an expanding fireball using momentum dependent dissociation rates in the Quark-Gluon Plasma (QGP). The coalescence component is inferred from a kinetic rate equation with a momentum dependence following from a blast wave approach. At SPS energies, where the direct component dominates, the interplay of Cronin effect and QGP suppression results in fair agreement with NA50 p_t spectra. At RHIC energies, the p_t spectra in central Au+Au collisions are characterized by a transition from regeneration at low p_t to direct production above. At lower centralities, the latter dominates at all p_t. | |
| dc.description | 7 pages, 6 figures; NA50 2000 data corrected in Fig.3 in v2; Implementation of leakage effect is corrected in v3, Numerical results for Cronin effect at RHIC are corrected in v3 | |
| dc.identifier | https://arxiv.org/abs/0712.2407 | |
| dc.identifier | http://arxiv.org/abs/0712.2407 | |
| dc.identifier | Phys.Lett.B664:253-257,2008 | |
| dc.identifier | doi:10.1016/j.physletb.2008.03.068 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/199912 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Transverse Momentum Spectra of J/ψin Heavy-Ion Collisions | |
| dc.type | text |