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

A generic expression of double-parton scattering (DPS) cross sections in high-energy nucleus-nucleus collisions is derived as a function of the corresponding single-parton hard cross sections. We consider the case of prompt-J/psi production and find that the DPS contributions represent (15--20)% of...

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Detalles Bibliográficos
Autores principales: d'Enterria, David, Snigirev, Alexander M.
Lenguaje:eng
Publicado: 2013
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2013.10.004
http://cds.cern.ch/record/1509416
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author d'Enterria, David
Snigirev, Alexander M.
author_facet d'Enterria, David
Snigirev, Alexander M.
author_sort d'Enterria, David
collection CERN
description A generic expression of double-parton scattering (DPS) cross sections in high-energy nucleus-nucleus collisions is derived as a function of the corresponding single-parton hard cross sections. We consider the case of prompt-J/psi production and find that the DPS contributions represent (15--20)% of the total J/psi cross section in lead-lead (PbPb) collisions at the CERN Large Hadron Collider. In Pb-Pb at 5.5 TeV, about 300 double-J/psi events are expected per unit midrapidity in the dilepton decay modes, per inverse-nanobarn. Double-J/psi DPS production can partially explain the relatively less suppressed yields of J/psi observed in Pb-Pb collisions at the LHC compared to results at lower collider energies.
id cern-1509416
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
record_format invenio
spelling cern-15094162021-05-04T07:18:18Zdoi:10.1016/j.physletb.2013.10.004http://cds.cern.ch/record/1509416engd'Enterria, DavidSnigirev, Alexander M.Enhanced J/Psi production from double parton scatterings in nucleus-nucleus collisions at the Large Hadron ColliderParticle Physics - PhenomenologyA generic expression of double-parton scattering (DPS) cross sections in high-energy nucleus-nucleus collisions is derived as a function of the corresponding single-parton hard cross sections. We consider the case of prompt-J/psi production and find that the DPS contributions represent (15--20)% of the total J/psi cross section in lead-lead (PbPb) collisions at the CERN Large Hadron Collider. In Pb-Pb at 5.5 TeV, about 300 double-J/psi events are expected per unit midrapidity in the dilepton decay modes, per inverse-nanobarn. Double-J/psi DPS production can partially explain the relatively less suppressed yields of J/psi observed in Pb-Pb collisions at the LHC compared to results at lower collider energies.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.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/ψ production in lead–lead (Pb–Pb) at the CERN Large Hadron Collider and find that about 20% (35%) of the J/ψ events in minimum-bias (most central) collisions contain a second J/ψ from double-parton interactions. In Pb–Pb at 5.5 TeV, in the absence of final-state effects, about 240 double- J/ψ events are expected per unit midrapidity and per inverse-nanobarn in the dilepton decay modes. The implications of double- J/ψ production on the interpretation of the observed J/ψ suppression in A–A collisions are discussed.arXiv:1301.5845oai:cds.cern.ch:15094162013-01-25
spellingShingle Particle Physics - Phenomenology
d'Enterria, David
Snigirev, Alexander M.
Enhanced J/Psi production from double parton scatterings in nucleus-nucleus collisions at the Large Hadron Collider
title Enhanced J/Psi production from double parton scatterings in nucleus-nucleus collisions at the Large Hadron Collider
title_full Enhanced J/Psi production from double parton scatterings in nucleus-nucleus collisions at the Large Hadron Collider
title_fullStr Enhanced J/Psi production from double parton scatterings in nucleus-nucleus collisions at the Large Hadron Collider
title_full_unstemmed Enhanced J/Psi production from double parton scatterings in nucleus-nucleus collisions at the Large Hadron Collider
title_short Enhanced J/Psi production from double parton scatterings in nucleus-nucleus collisions at the Large Hadron Collider
title_sort enhanced j/psi production from double parton scatterings in nucleus-nucleus collisions at the large hadron collider
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/j.physletb.2013.10.004
http://cds.cern.ch/record/1509416
work_keys_str_mv AT denterriadavid enhancedjpsiproductionfromdoublepartonscatteringsinnucleusnucleuscollisionsatthelargehadroncollider
AT snigirevalexanderm enhancedjpsiproductionfromdoublepartonscatteringsinnucleusnucleuscollisionsatthelargehadroncollider

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