Journal
PHYSICS LETTERS B
Volume 727, Issue 1-3, Pages 157-162Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2013.10.004
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Funding
- CERN-RFBR Joint Research Grant [12-02-91505]
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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.
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