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J/psi elliptic flow measurement in Pb-Pb collisions at \sqrt(s_(NN)) = 2.76 TeV at forward rapidity with the ALICE experiment
Massacrier L.
Hard Probes 2012, Cagliari : Italie (2012) - http://hal.in2p3.fr/in2p3-00730928
Physique/Physique des Hautes Energies - Expérience
Physique/Physique Nucléaire Expérimentale
J/psi elliptic flow measurement in Pb-Pb collisions at \sqrt{s_{NN}} = 2.76 TeV at forward rapidity with the ALICE experiment
L. Massacrier1
1 :  SUBATECH - Laboratoire SUBATECH Nantes
http://www-subatech.in2p3.fr/
CNRS : UMR6457 – IN2P3 – Université de Nantes – École Nationale Supérieure des Mines - Nantes
4, rue Alfred Kastler - 44070 Nantes Cedex 03
France
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.
ALICE

Communications sans actes
28/05/2012

Hard Probes 2012
Cagliari
Italie
27/05/2012
01/06/2012

SUBATECH-Plasma
proceeding of Hard Probes 2012 conference

Lien vers le texte intégral : 
http://fr.arXiv.org/abs/1208.5401