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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
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0001-6945-1916
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0003-3867-0336
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8015-7512
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Number of Authors: 29152018 (English)In: The European Physical Journal CArticle in journal (Refereed) Published
Abstract [en]

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 < pT< 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/ ψv2 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.

Place, publisher, year, edition, pages
Elsevier, 2018.
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Physical Sciences
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URN: urn:nbn:se:kth:diva-237460DOI: 10.1140/epjc/s10052-018-6243-9ISI: 000446189400002Scopus ID: 2-s2.0-85053924584OAI: oai:DiVA.org:kth-237460DiVA, id: diva2:1259291
Note

QC 20181029

Available from: 2018-10-29 Created: 2018-10-29 Last updated: 2019-10-18Bibliographically approved

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Kastanas, A.Lund-Jensen, B.Ohm, C. C.Ripellino, G.Sidebo, P. E.Strandberg, J.

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