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Quarkonium production in ALICE at the LHC

Abstract : In heavy-ion collisions at the LHC, the ALICE Collaboration is studying Quantum Chromodynamics (QCD) matter at very high energy density where the formation of a Quark Gluon Plasma (QGP) is expected. Quarkonium production is an important probe to characterize the QGP properties. High precision data in pp collisions provide the baseline of Pb-Pb measurements and p-Pb collisions serve to quantify the amount of initial and/or final state effects, related to cold nuclear matter, that are largely unknown at the LHC energy. Since 2010, the LHC provided Pb-Pb collisions at sqrt{s_{NN}} = 2.76 TeV, pp collisions at various energies and in 2013 p-Pb collisions at sqrt{s_{NN}} = 5.02 TeV. In ALICE, quarkonia can be reconstructed at forward rapidity in the dimuon channel and at mid-rapidity in the dielectron channel, and, for both channels, down to zero transverse momentum. New measurements on inclusive production of J/psi, psi (2S) and Upsilon performed in p-Pb collisions and on the p_T dependence of inclusive J/psi in Pb-Pb collisions are presented. The contribution of J/psi from B hadrons to the inclusive production in Pb-Pb is also discussed. Finally, an estimation of the cold nuclear matter effect in Pb-Pb, extrapolated from p-Pb measurements, is given.
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http://hal.in2p3.fr/in2p3-01005915
Contributor : Sophie Heurteau <>
Submitted on : Friday, June 13, 2014 - 2:31:26 PM
Last modification on : Wednesday, October 14, 2020 - 3:57:06 AM

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C. Hadjidakis, For The Alice Collaboration. Quarkonium production in ALICE at the LHC. Hard Probes 2013 6th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions, Nov 2013, Cap Town, South Africa. pp.541-548, ⟨10.1016/j.nuclphysa.2014.09.085⟩. ⟨in2p3-01005915⟩

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