Quarkonium production measurements with the ALICE detector at the LHC

Abstract

In this new energy regime, quarkonium provides a unique probe to study the properties of the high-density, strongly interacting system formed in the early stages of high-energy heavy-ion collisions. In ALICE, quarkonium states are reconstructed down to p_T=0 via their mu+mu- decay channel in the muon spectrometer (2.5<y<4.0) and via their e+e- channel in the central barrel (|y|<0.9). Measurement of the transverse momentum and rapidity distributions of inclusive J/psi production cross section in proton-proton collisions at sqrt{s}=2.76 and 7 TeV will be presented. We will discuss the dependence on charged particle multiplicity of the inclusive J/psi yield in proton-proton collisions at sqrt{s}=7 TeV. Finally, the analysis of the inclusive J/psi production in Pb-Pb collisions at sqrt{s_NN}=2.76 TeV will be described. Preliminary results on the nuclear modification factor (R_AA) and the central to peripheral nuclear modification factor (R_CP) will be discussed.

8 pages, 3 figures, plenary talk at Quark Matter 2011, May 23rd-28th 2011, Annecy, France

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• J/psi Production vs Centrality, Transverse Momentum, and Rapidity in Au+Au Collisions at sqrt(s_NN) = 200 GeV
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• Cross section normalization in proton-proton collisions at $\sqrt{s}$ = 2.76 TeV and 7 TeV, with ALICE at LHC
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Cited by in corpus (12)

• First Results from Pb+Pb collisions at the LHC
• Medium Effects on Charmonium Production at ultrarelativistic energies available at the CERN Large Haron Collider
• Stochastic potential and quantum decoherence of heavy quarkonium in the quark-gluon plasma
• Upsilon suppression in PbPb collisions at the LHC
• Gluodissociation and Screening of Upsilon States in PbPb Collisions at sqrt (s_NN) = 2.76 TeV
• Heavy-flavour production in Pb-Pb collisions at the LHC, measured with the ALICE detector
• Υ Production in Heavy Ion Collisions at LHC
• ALICE results from the first Pb-Pb run at the CERN LHC
• Charmonium production from nonequilibrium charm and anticharm quarks in quark-gluon plasma
• In-medium pseudoscalar $D/B$ mesons and charmonium decay width
• PHENIX Measurements of Higher-order Flow Harmonics in Au+Au collisions at Root_s = 200 GeV
• Analysis of pseudoscalar and scalar $D$ mesons and charmonium decay width in hot magnetized asymmetric nuclear matter