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Prompt and non-prompt J/ψ elliptic flow in Pb+Pb collisions at sNN=5.02 Tev with the ATLAS detector

ContributorsATLAS Collaboration
Collection
  • Open Access - SCOAP3
Publication date2018
Abstract

The elliptic flow of prompt and non-prompt J/ψ was measured in the dimuon decay channel in Pb+Pb collisions at sNN=5.02 TeV with an integrated luminosity of 0.42nb-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/ψ decay. The measurement is performed in the kinematic range of dimuon transverse momentum and rapidity 9<30 GeV , |y|<2 , and 0–60% 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/ψ mesons have non-zero elliptic flow. Prompt J/ψ v2 decreases as a function of pT , while for non-prompt J/ψ it is, with limited statistical significance, consistent with a flat behaviour over the studied kinematic region. There is no observed dependence on rapidity or centrality.

Citation (ISO format)
ATLAS Collaboration. Prompt and non-prompt J/ψ elliptic flow in Pb+Pb collisions at sNN=5.02 Tev with the ATLAS detector. In: The European Physical Journal. C, Particles and Fields, 2018, vol. 78, n° 9, p. 784. doi: 10.1140/epjc/s10052-018-6243-9
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Article (Published version)
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ISSN of the journal1434-6044
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