dorsal/arxiv
View SchemaEffects of Multiple Scattering in Cold Nuclear Matter on J/psi Suppression and <p_T^2> in Heavy Ion Collisions
| Authors | A. M. Glenn, Denes Molnar, J. L. Nagle |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0602068 |
| URL | https://arxiv.org/abs/nucl-th/0602068 |
| DOI | 10.1016/j.physletb.2006.10.069 |
| Journal | Phys.Lett. B644 (2007) 119-125 |
Abstract
Coherent multiple scatterings of c and cbar quark pairs in the environment of heavy ion collisions have been used in a previous work by Qiu et al. [Qiu:1998rz] to study J/psi suppression. That model suggests that heavy quark re-scatterings in a cold nuclear medium can completely explain the centrality dependence of the observed J/psi suppression in Pb+Pb collisions at the SPS [Abreu:2001kd]. Their calculations also revealed significant differences under the assumptions of a color singlet or color octet production mechanism. A more recent analytic calculation [Fujii:2003fq], which includes incoherent final-state re-scatterings with explicit momentum transfer fluctuations in three dimensions, indicates much less suppression and little sensitivity to the production mechanism. In this article, we study simultaneously both the J/psi suppression and p_T modifications, at SPS and RHIC energies. We mainly focus on incoherent momentum transfer fluctuations in two dimensions, which is more appropriate for the heavy-ion collision kinematics. Our analytic and Monte-Carlo calculations reinforce the analytic results in [Fujii:2003fq]. Additionally, we find that the experimental J/psi suppression and <p_T^2> from nucleus-nucleus collisions at the SPS or RHIC cannot simultaneously be described in this incoherent multiple scattering framework for any value of the fluctuation strength parameter <k_T^2>.
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"abstract": "Coherent multiple scatterings of c and cbar quark pairs in the environment of\nheavy ion collisions have been used in a previous work by Qiu et al.\n[Qiu:1998rz] to study J/psi suppression. That model suggests that heavy quark\nre-scatterings in a cold nuclear medium can completely explain the centrality\ndependence of the observed J/psi suppression in Pb+Pb collisions at the SPS\n[Abreu:2001kd]. Their calculations also revealed significant differences under\nthe assumptions of a color singlet or color octet production mechanism. A more\nrecent analytic calculation [Fujii:2003fq], which includes incoherent\nfinal-state re-scatterings with explicit momentum transfer fluctuations in\nthree dimensions, indicates much less suppression and little sensitivity to the\nproduction mechanism. In this article, we study simultaneously both the J/psi\nsuppression and p_T modifications, at SPS and RHIC energies. We mainly focus on\nincoherent momentum transfer fluctuations in two dimensions, which is more\nappropriate for the heavy-ion collision kinematics. Our analytic and\nMonte-Carlo calculations reinforce the analytic results in [Fujii:2003fq].\nAdditionally, we find that the experimental J/psi suppression and \u003cp_T^2\u003e from\nnucleus-nucleus collisions at the SPS or RHIC cannot simultaneously be\ndescribed in this incoherent multiple scattering framework for any value of the\nfluctuation strength parameter \u003ck_T^2\u003e.",
"arxiv_id": "nucl-th/0602068",
"authors": [
"A. M. Glenn",
"Denes Molnar",
"J. L. Nagle"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/j.physletb.2006.10.069",
"journal_ref": "Phys.Lett. B644 (2007) 119-125",
"title": "Effects of Multiple Scattering in Cold Nuclear Matter on J/psi Suppression and \u003cp_T^2\u003e in Heavy Ion Collisions",
"url": "https://arxiv.org/abs/nucl-th/0602068"
},
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