J/ψ elliptic flow in Pb-Pb collisions at √sNN = 5.02 TeV (CROSBI ID 246387)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Acharya, S. ; ... ; Antičić, Tome ; ... ; Erhardt, Filip ; ... ; Jerčić, Marko ; ... ; Lončar, Petra ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Simatović, Goran ; ... ; Utrobičić, Antonija ; ... ; Zou, S.
ALICE Collaboration
engleski
J/ψ elliptic flow in Pb-Pb collisions at √sNN = 5.02 TeV
We report a precise measurement of the J/ψ elliptic flow in Pb-Pb collisions at √sNN=5.02 TeV with the ALICE detector at the LHC. The J/ψ mesons are reconstructed at mid-rapidity (|y|< 0.9) in the dielectron decay channel and at forward rapidity (2.5< y< 4.0) in the dimuon channel, both down to zero transverse momentum. At forward rapidity, the elliptic flow v2 of the J/ψ is studied as a function of transverse momentum and centrality. A positive v2 is observed in the transverse momentum range 2< pT< 8 GeV/c in the three centrality classes studied and confirms with higher statistics our earlier results at sNN−−−√=2.76 TeV in semi- central collisions. At mid-rapidity, the J/ψ v2 is investigated as a function of transverse momentum in semi-central collisions and found to be in agreement with the measurements at forward rapidity. These results are compared to transport model calculations. The comparison supports the idea that at low pT the elliptic flow of the J/ψ originates from the thermalization of charm quarks in the deconfined medium, but suggests that additional mechanisms might be missing in the models.
flow, elliptic, Pb-Pb, 5.02TeV
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Podaci o izdanju
119 (24)
2017.
242301
13
objavljeno
0031-9007
1079-7114
10.1103/PhysRevLett.119.242301