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dc.contributor.authorALICE Collaboration
dc.date.accessioned2021-05-26T05:35:42Z
dc.date.available2021-05-26T05:35:42Z
dc.date.issued2021
dc.identifier.citationALICE Collaboration. (2021). Elliptic Flow of Electrons from Beauty-Hadron Decays in Pb-Pb Collisions at √sNN = 5.02 TeV. <i>Physical Review Letters</i>, <i>126</i>(16), Article 162001. <a href="https://doi.org/10.1103/PhysRevLett.126.162001" target="_blank">https://doi.org/10.1103/PhysRevLett.126.162001</a>
dc.identifier.otherCONVID_89705893
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/75951
dc.description.abstractThe 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.en
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review Letters
dc.rightsCC BY 4.0
dc.titleElliptic Flow of Electrons from Beauty-Hadron Decays in Pb-Pb Collisions at √sNN = 5.02 TeV
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-202105263208
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.description.reviewstatuspeerReviewed
dc.relation.issn0031-9007
dc.relation.numberinseries16
dc.relation.volume126
dc.type.versionpublishedVersion
dc.rights.copyright© 2021 CERN, for the ALICE Collaboration
dc.rights.accesslevelopenAccessfi
dc.subject.ysohiukkasfysiikka
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p15576
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.1103/PhysRevLett.126.162001


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