Nuclear modification of the J/ψ transverse momentum distributions in high energy pA and AA collisions

被引：18

作者：

Kharzeev, D. E. ^{[1
,2
]}

Levin, E. M. ^{[3
,4
,5
]}

Tuchin, K. ^{[6
]}

机构：

[1] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

[2] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[3] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, HEP Dept, Sch Phys, IL-69978 Tel Aviv, Israel

[4] Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile

[5] Ctr Cient Tecnol Valparaiso, Valparaiso, Chile

[6] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

来源：

NUCLEAR PHYSICS A | 2014年 / 924卷

关键词：

J/psi; Gluon saturation; Color glass condensate; Heavy ion collisions; HEAVY-ION COLLISIONS; COLOR GLASS CONDENSATE; HIGH-DENSITY QCD; BFKL POMERON; HADRON-PRODUCTION; SATURATION; SUPPRESSION; DEPENDENCE; EVOLUTION; RAPIDITY;

D O I：

10.1016/j.nuclphysa.2014.01.006

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We evaluate the transverse momentum spectrum of J/psi (up to semi-hard momenta) in pA and AA collisions taking into account only the initial state effects, but resumming them to all orders in alpha(2)(s)A(1/3). In our previous papers we noticed that cold nuclear matter effects alone could not explain the experimental data on rapidity and centrality dependencies of the J/psi yield in AA collisions indicating the existence of an additional suppression mechanism. Our present calculations indicate that the discrepancy persists and even increases at semi-hard transverse momenta, implying a significant final state effect on J/psi production in this kinematical domain. The QCD dipole model we employ is only marginally applicable for J/psi production at mid-rapidity at RHIC energies but its use is justified in the forward rapidity region. At LHC energies we can quantitatively evaluate the magnitude of cold nuclear matter effects in the entire kinematical region of interest. We present our calculations of J/psi transverse momentum spectra in pA and AA collisions at LHC and RHIC energies. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：47 / 64

页数：18

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