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arXiv · 1301.5845

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

David d'Enterria·Alexander M. Snigirev
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Abstract

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.

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David d'Enterria, Alexander M. Snigirev. 2013-06-28. Enhanced J/Psi-pair production from double parton scatterings in nucleus-nucleus collisions at the Large Hadron Collider. https://doi.org/10.1016/j.physletb.2013.10.004

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