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Prompt and non-prompt $J/\psi $ elliptic flow in Pb+Pb collisions at $\sqrt{s_{_\text {NN}}} = 5.02$ Tev with the ATLAS detector

2018-09-27Journal article Open access
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dc.contributor.authorATLAS collaboration (2924 authors)
dc.contributor.authorAguilar Saavedra, Juan Antonio
dc.contributor.authorAmor Dos Santos, Susana Patricia
dc.contributor.authorAraque Espinosa, Juan Pedro
dc.contributor.authorCastro, Nuno Filipe
dc.contributor.authorConde Muino, Patricia
dc.contributor.authorDa Cunha Sargedas De Sousa, Mario Jose
dc.contributor.authorDias DO Vale, Tiago
dc.contributor.authorFaisca Rodrigues Pereira, Rui Miguel
dc.contributor.authorFiolhais, Miguel
dc.contributor.authorGalhardo, Bruno
dc.contributor.authorGomes, Agostinho
dc.contributor.authorGoncalo, Ricardo
dc.contributor.authorJorge, Pedro
dc.contributor.authorMachado Miguens, Joana
dc.contributor.authorMaio, Amelia
dc.contributor.authorManeira, Jose
dc.contributor.authorMendes Gouveia, Emanuel Demetrio
dc.contributor.authorOleiro Seabra, Luis Filipe
dc.contributor.authorOnofre, Antonio
dc.contributor.authorCosta Batalha Pedro, Rute
dc.contributor.authorPereira Peixoto, Ana Paula
dc.contributor.authorSantos, Helena
dc.contributor.authorSaraiva, Joao
dc.contributor.authorSilva, Jose Manuel
dc.contributor.authorTavares Delgado, Ademar
dc.contributor.authorVeloso, Filipe
dc.contributor.authorWolters, Helmut
dc.date.accessioned2019-02-05T16:40:40Z
dc.date.available2019-02-05T16:40:40Z
dc.date.issued2018-09-27
dc.date.updated2019-02-05T16:40:40Z
dc.description.abstractThe elliptic flow of prompt and non-prompt $J/\psi $ was measured in the dimuon decay channel in Pb+Pb collisions at $\sqrt{s_{_\text {NN}}}=5.02$   $\text {TeV}$ with an integrated luminosity of $0.42~\mathrm {nb}^{-1}$ 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 $9<p_\mathrm {T}<30$   $\text {GeV}$ , $|y|<2$ , 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 $p_\mathrm {T}$ , 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.
dc.description.versionPeer Reviewed
dc.identifierEur.Phys.J. C78 (2018) 784 Eur. Phys. J. C 78 (2018) 784; DOI 10.1140/epjc/s10052-018-6243-9
dc.identifier.urihttp://dx.doi.org/10.1140/epjc/s10052-018-6243-9
dc.identifier.urihttp://hdl.handle.net/10400.26/27681
dc.language.isoeng
dc.titlePrompt and non-prompt $J/\psi $ elliptic flow in Pb+Pb collisions at $\sqrt{s_{_\text {NN}}} = 5.02$ Tev with the ATLAS detector
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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