Heavy quark pair production in high-energy pA collisions: Quarkonium

被引：112
作者：
Fujii, Hirotsugu [1 ]
Watanabe, Kazuhiro [1 ]
机构：
[1] Univ Tokyo, Inst Phys, Tokyo 1538902, Japan
来源：
NUCLEAR PHYSICS A | 2013年 / 915卷
关键词：
Quark-gluon plasma; High-energy proton nucleus collisions; Quarkonium; COLOR GLASS CONDENSATE; TRANSVERSE-MOMENTUM DEPENDENCE; GLUON DISTRIBUTION-FUNCTIONS; Q(Q)OVER-BAR BOUND-STATE; J/PSI-PRODUCTION; ANGULAR-CORRELATIONS; PP COLLISIONS; PB COLLISIONS; LONG-RANGE; PROTON;
D O I：
10.1016/j.nuclphysa.2013.06.011
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：
Quarkonium production in high-energy proton (deuteron) nucleus collisions is investigated in the color glass condensate framework. We employ the color evaporation model assuming that the quark pair produced from dense small-x gluons in the nuclear target bounds into a quarkonium outside the target. The unintegrated gluon distribution at small Bjorken x in the nuclear target is treated with the Balitsky-Kovchegov equation with running coupling corrections. For the gluons in the proton, we examine two possible descriptions, unintegrated gluon distribution and ordinary collinear gluon distribution. We present the transverse momentum spectrum and nuclear modification factor for J/psi production at RHIC and LHC energies, and those for Upsilon (1S) at LHC energy, and discuss the nuclear modification factor and the momentum broadening by changing the rapidity and the initial saturation scale. (C) 2013 Elsevier B.V. All rights reserved.
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页码：1 / 23
页数：23
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