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J/Psi Elliptic Flow in Pb-Pb Collisions at sqrt(sNN) = 2.76 TeV

E. Abbas Laurent Aphecetche 1 A. Baldisseri 2 Guillaume Batigne 1 A.A.E. Bergognon 1 M. Bregant 1 J. Castillo Castellanos 2 J.L. Charvet 2 C. Cheshkov 3 B. Cheynis 3 H. Delagrange 1 O. Driga 1 L. Ducroux 3 B. Erazmus 1 Magali Estienne 1 Marie Germain 1 C. Geuna 2 Maxime Guilbaud 3 B. Hippolyte 4 C. Kuhn 4 A. Lardeux 1 Gines Martinez Garcia 1 A. Mas 1 L. Massacrier 1 L. Molnar 4 H. Pereira da Costa 2 Philippe Pillot 1 C. Roy 4 X. Sanchez Castro 4 Y. Schutz 1 S. Senyukov 4 Alexandre Shabetai 1 Diego Stocco 1 R. Tieulent 3 A. Uras 3 R. Vernet 5 H. Yang 2 Y. Zoccarato 3 N. Arbor 6 G. Conesa Balbastre 6 J. Faivre 6 C. Furget 6 R. Guernane 6 S. Kox 6 J.S. Real 6 C. Silvestre 6 Y.W. Baek 7 V. Barret 7 N. Bastid 7 P. Crochet 7 P. Dupieux 7 R. Ichou 7 S. Li 7 X. Lopez 7 F. Manso 7 M. Marchisone 7 S. Porteboeuf-Houssais 7 P. Rosnet 7 B. Vulpescu 7 X. Zhang 7 Z. Conesa Del Valle 8 I. Das 8 B. Espagnon 8 C. Hadjidakis 8 I. Lakomov 8 C. Suire 8 J. D. Tapia Takaki 8 L. Valencia Palomo 8 
Abstract : We report on the first measurement of inclusive J/Psi elliptic flow, v2, in heavy-ion collisions at the LHC. The measurement is performed with the ALICE detector in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV in the rapidity range 2.5 < y < 4.0. The dependence of the J/Psi v2 on the collision centrality and on the J/Psi transverse momentum is studied in the range 0 <= pT < 10 GeV/c. For semi-central Pb-Pb collisions at sqrt(sNN) = 2.76 TeV, an indication of non-zero v2 is observed with a maximum value of v2 = 0.116+/-0.046(stat.)+/-0.029(syst.) for J/Psi in the transverse momentum range 2 <= pT < 4 GeV/c. The elliptic flow measurement complements the previously reported ALICE results on the inclusive J/Psi nuclear modification factor and favors the scenario of a significant fraction of J/Psi production from charm quarks in a deconfined partonic phase.
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https://hal.in2p3.fr/in2p3-00804625
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Submitted on : Tuesday, March 26, 2013 - 7:47:24 AM
Last modification on : Sunday, June 26, 2022 - 11:58:28 AM

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E. Abbas, Laurent Aphecetche, A. Baldisseri, Guillaume Batigne, A.A.E. Bergognon, et al.. J/Psi Elliptic Flow in Pb-Pb Collisions at sqrt(sNN) = 2.76 TeV. Physical Review Letters, American Physical Society, 2013, 111, pp.162301. ⟨10.1103/PhysRevLett.111.162301⟩. ⟨in2p3-00804625⟩

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