J/psi elliptic flow measurement in Pb-Pb collisions at \sqrt{s_{NN}} = 2.76 TeV at forward rapidity with the ALICE experiment

Abstract : J/psi suppression induced by color screening of its constituent quarks was proposed 26 years ago as a signature of the formation of a quark gluon plasma in heavy-ion collisions. Recent results from ALICE in Pb-Pb collisions exhibit a smaller suppression with respect to previous measurements at the SPS and RHIC. The study of azimuthal anisotropy in particle production gives information on the collective hydrodynamic expansion at the early stage of the fireball, where the matter created in high-energy nuclear collisions is expected to be in a deconfined state. In particular, J/psi elliptic flow v2 is important to test the degree of thermalization of heavy quarks. Together with the production yields, the elliptic flow is a powerful observable to address the question of suppression and regeneration of J/psi in QGP. We present the first inclusive J/psi elliptic flow measurement performed with the muon spectrometer of ALICE, in Pb-Pb collisions, at forward rapidity. Integrated and pT-differential v2 results are presented and a comparison with recent STAR results and with a parton transport model is also performed.
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Conference papers
Hard Probes 2012, May 2012, Cagliari, Italy


http://hal.in2p3.fr/in2p3-00730928
Contributor : Girod Dominique <>
Submitted on : Tuesday, September 11, 2012 - 2:00:35 PM
Last modification on : Tuesday, September 11, 2012 - 2:00:35 PM

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  • HAL Id : in2p3-00730928, version 1
  • ARXIV : 1208.5401

Citation

L. Massacrier. J/psi elliptic flow measurement in Pb-Pb collisions at \sqrt{s_{NN}} = 2.76 TeV at forward rapidity with the ALICE experiment. Hard Probes 2012, May 2012, Cagliari, Italy. <in2p3-00730928>

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