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Elliptic Flow of Electrons from Beauty-Hadron Decays in Pb-Pb Collisions at sNN =5.02 TeV

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dc.contributor.authorAcharya, S.
dc.contributor.authorAdamova, D.
dc.contributor.authorAdler, A.
dc.contributor.authorAdolfsson, J.
dc.contributor.authorBelyaev, V.
dc.contributor.authorBogdanov, A.
dc.contributor.authorBolozdynya, A.
dc.contributor.authorBorissov, A.
dc.contributor.authorGrigoriev, V.
dc.contributor.authorKaplin, V.
dc.contributor.authorKondratyeva, N.
dc.contributor.authorLoginov, V.
dc.contributor.authorMelikyan, Y.
dc.contributor.authorSamsonov, V.
dc.contributor.authorSelyuzhenkov, I.
dc.contributor.authorБеляев, Владимир Никитич
dc.contributor.authorБогданов, Алексей Александрович
dc.contributor.authorБолоздыня, Александр Иванович
dc.contributor.authorГригорьев, Владислав Анатольевич
dc.contributor.authorКондратьева, Наталья Викторовна
dc.contributor.authorЛогинов, Виталий Александрович
dc.date.accessioned2024-11-29T15:50:26Z
dc.date.available2024-11-29T15:50:26Z
dc.date.issued2021
dc.description.abstract© 2021 CERN.The elliptic flow of electrons from beauty hadron decays at midrapidity (|y|<0.8) is measured in Pb-Pb collisions at sNN=5.02 TeV with the ALICE detector at the LHC. The azimuthal distribution of the particles produced in the collisions can be parametrized with a Fourier expansion, in which the second harmonic coefficient represents the elliptic flow, v2. The v2 coefficient of electrons from beauty hadron decays is measured for the first time in the transverse momentum (pT) range 1.3-6 GeV/c in the centrality class 30%-50%. The measurement of electrons from beauty-hadron decays exploits their larger mean proper decay length cτ≈500 μm compared to that of charm hadrons and most of the other background sources. The v2 of electrons from beauty hadron decays at midrapidity is found to be positive with a significance of 3.75 σ. The results provide insights into the degree of thermalization of beauty quarks in the medium. A model assuming full thermalization of beauty quarks is strongly disfavored by the measurement at high pT, but is in agreement with the results at low pT. Transport models including substantial interactions of beauty quarks with an expanding strongly interacting medium describe the measurement within uncertainties.
dc.identifier.citationElliptic Flow of Electrons from Beauty-Hadron Decays in Pb-Pb Collisions at sNN =5.02 TeV / Acharya, S. [et al.] // Physical Review Letters. - 2021. - 126. - № 16. - 10.1103/PhysRevLett.126.162001
dc.identifier.doi10.1103/PhysRevLett.126.162001
dc.identifier.urihttps://www.doi.org/10.1103/PhysRevLett.126.162001
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85105687703&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000652829100004
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/24115
dc.relation.ispartofPhysical Review Letters
dc.titleElliptic Flow of Electrons from Beauty-Hadron Decays in Pb-Pb Collisions at sNN =5.02 TeV
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue16
oaire.citation.volume126
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