J/ψ Elliptic Flow in Pb-Pb Collisions at √SNN = 2.76 TeV

Abbas, E. and Planinić, Mirko and Poljak, Nikola and Simatović, Goran and Zyzak, M. (ALICE Collaboration) (2013) J/ψ Elliptic Flow in Pb-Pb Collisions at √SNN = 2.76 TeV. Physical Review Letters, 111 (16). pp. 162301-11. ISSN 0031-9007

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We report on the first measurement of inclusive J/ψ elliptic flow v2 in heavy-ion collisions at the LHC. The measurement is performed with the ALICE detector in Pb-Pb collisions at √sNN=2.76  TeV in the rapidity range 2.5<y<4.0. The dependence of the J/ψ v2 on the collision centrality and on the J/ψ transverse momentum is studied in the range 0≤pT<10  GeV/c. For semicentral Pb-Pb collisions at √sNN√=2.76  TeV, an indication of nonzero v2 is observed with a largest measured value of v2=0.116±0.046(stat)±0.029(syst) for J/ψ in the transverse momentum range 2≤pT<4  GeV/c. The elliptic flow measurement complements the previously reported ALICE results on the inclusive J/ψ nuclear modification factor and favors the scenario of a significant fraction of J/ψ production from charm quarks in a deconfined partonic phase.

Item Type: Article
Date: October 2013
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2013) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 098-0982887-2878, 119-0982887-1006
Publisher: American Physical Society
Depositing User: mag. bibl. Marija Turković
Date Deposited: 15 Sep 2014 12:20
Last Modified: 23 Feb 2016 15:13
URI: http://digre.pmf.unizg.hr/id/eprint/2770

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