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=c 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.

J/ψ Elliptic Flow in Pb-Pb Collisions at √sNN=2.76  TeV / Abbas, E., Abelev, B., Adam, J., Adamová, D., Adare, A.M., Aggarwal, M.M., Aglieri Rinella, G., Agnello, M., Agocs, A.G., Agostinelli, A., Ahammed, Z., Ahmad, N., Ahmad Masoodi, A., Ahn, S.A., Ahn, S.U., Aimo, I., Ajaz, M., Akindinov, A., Aleksandrov, D., Alessandro, B., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - ELETTRONICO. - 111:(2013), pp. 162301-1-162301-11. [10.1103/PhysRevLett.111.162301]

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

CAMERINI, Paolo;G. Contin;FRAGIACOMO, ENRICO;LEA, RAMONA;LUPARELLO, GRAZIA;MARGAGLIOTTI, GIACOMO;PIANO, STEFANO;RUI, RINALDO;V. Zaccolo;
2013-01-01

Abstract

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
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2741100
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