Prompt and non-prompt J/ψ elliptic flow in Pb+Pb collisions at √sNN=5.02 Tev with the ATLAS detector
The elliptic flow of prompt and non-prompt $$J/\psi $$ was measured in the dimuon decay channel in Pb+Pb collisions at $$\sqrt{s_{_\text {NN}}} = 5.02$$ TeV with an integrated luminosity of 0.42 nb-1 with the ATLAS detector at the LHC. The prompt and non-prompt signals are separated using a two-dimensional simultaneous fit of the invariant mass and pseudo-proper decay time of the dimuon system from the $$J/\psi $$ decay. The measurement is performed in the kinematic range of dimuon transverse momentum and rapidity 9 < pT< 30 GeV, |y| < 2 , and 0–60%25 collision centrality. The elliptic flow coefficient, v2, is evaluated relative to the event plane and the results are presented as a function of transverse momentum, rapidity and centrality. It is found that prompt and non-prompt $$J/\psi $$ mesons have non-zero elliptic flow. Prompt $$J/\psi $$ v2 decreases as a function of pT, while for non-prompt $$J/\psi $$ it is, with limited statistical significance, consistent with a flat behaviour over the studied kinematic region. Finally, there is no observed dependence on rapidity or centrality.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Harvard Univ., Cambridge, MA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Contributing Organization:
- ATLAS Collaboration
- Grant/Contract Number:
- AC02-05CH11231; SC0007881
- OSTI ID:
- 1506354
- Alternate ID(s):
- OSTI ID: 1730915
- Journal Information:
- European Physical Journal. C, Particles and Fields, Vol. 78, Issue 9; ISSN 1434-6044
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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