Prompt and non-prompt J/psi elliptic flow in Pb plus Pb collisions at root S-NN=5.02 TeV with the ATLAS detectorShow others and affiliations
Number of Authors: 29112018 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 78, no 9, article id 784Article in journal (Refereed) Published
Abstract [en]
The elliptic flow of prompt and non-prompt J/psi was measured in the dimuon decay channel in Pb+Pb collisions at root S-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 < p(T) < 30 GeV, vertical bar y vertical bar < 2, and 0-60% collision centrality. The elliptic flow coefficient, v(2), 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 v(2 )decreases as a function of p(T), while for non-prompt J/psi 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
SPRINGER , 2018. Vol. 78, no 9, article id 784
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-368760DOI: 10.1140/epjc/s10052-018-6243-9ISI: 000446189400002OAI: oai:DiVA.org:uu-368760DiVA, id: diva2:1269054
Funder
Swedish Research CouncilEU, European Research CouncilEU, FP7, Seventh Framework ProgrammeEU, Horizon 2020Wallenberg Foundations
Note
For complete list of authors see http://dx.doi.org/10.1140/epjc/s10052-018-6243-9
2018-12-072018-12-072018-12-07Bibliographically approved