Enhanced J/ψ-pair production from double-parton scatterings in nucleus-nucleus collisions at the Large Hadron Collider

被引：34

作者：

d'Enterria, David ^{[1
]}

Snigirev, Alexander M. ^{[2
]}

机构：

[1] CERN, PH Dept, CH-1211 Geneva, Switzerland

[2] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia

来源：

PHYSICS LETTERS B | 2013年 / 727卷 / 1-3期

关键词：

PP COLLISIONS;

D O I：

10.1016/j.physletb.2013.10.004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A generic expression of double-parton scattering cross sections in high-energy nucleus-nucleus (A-A) collisions is derived as a function of the corresponding single-parton hard cross sections and of the A-A event centrality. We consider the case of prompt-J/psi production in lead-lead (Pb-Pb) at the CERN Large Hadron Collider and find that about 20% (35%) of the J/psi events in minimum-bias (most central) collisions contain a second J/psi from double-parton interactions. In Pb-Pb at 5.5 TeV, in the absence of final-state effects, about 240 double-J/psi events are expected per unit midrapidity and per inverse-nanobarn in the dilepton decay modes. The implications of double-J/psi production on the interpretation of the observed J/psi suppression in A-A collisions are discussed. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：157 / 162

页数：6

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