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Polarization of ? and ? ¯ Hyperons along the Beam Direction in Pb-Pb Collisions at s NN=5.02 TeV

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dc.contributor.authorAcharya, S.
dc.contributor.authorAdamova, D.
dc.contributor.authorAdler, A.
dc.contributor.authorAglieri, Rinella G.
dc.contributor.authorBelyaev, V.
dc.contributor.authorBogdanov, A.
dc.contributor.authorBolozdynya, A.
dc.contributor.authorGrigoriev, V.
dc.contributor.authorKaplin, V.
dc.contributor.authorKondratyeva, N.
dc.contributor.authorLoginov, V.
dc.contributor.authorOkorokov, V. A.
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.contributor.authorОкороков, Виталий Алексеевич
dc.date.accessioned2024-12-25T13:44:20Z
dc.date.available2024-12-25T13:44:20Z
dc.date.issued2022
dc.description.abstract©, where f is the hyperon azimuthal emission angle and ?2 is the elliptic flow plane angle. We report the measurement of Pz,s2 for different collision centralities and in the 30%-50% centrality interval as a function of the hyperon transverse momentum and rapidity. The Pz,s2 is positive similarly as measured by the STAR Collaboration in Au-Au collisions at sNN=200 GeV, with somewhat smaller amplitude in the semicentral collisions. This is the first experimental evidence of a nonzero hyperon Pz in Pb-Pb collisions at the LHC. The comparison of the measured Pz,s2 with the hydrodynamic model calculations shows sensitivity to the competing contributions from thermal and the recently found shear-induced vorticity, as well as to whether the polarization is acquired at the quark-gluon plasma or the hadronic phase. The polarization of the ? and ?¯ hyperons along the beam (z) direction, Pz, has been measured in Pb-Pb collisions at sNN=5.02 TeV recorded with ALICE at the Large Hadron Collider (LHC). The main contribution to Pz comes from elliptic flow-induced vorticity and can be characterized by the second Fourier sine coefficient Pz,s2=?Pzsin(2f-2?2)
dc.identifier.citationPolarization of ? and ? ¯ Hyperons along the Beam Direction in Pb-Pb Collisions at s NN=5.02 TeV / Acharya, S. [et al.] // Physical Review Letters. - 2022. - 128. - № 17. - 10.1103/PhysRevLett.128.172005
dc.identifier.doi10.1103/PhysRevLett.128.172005
dc.identifier.urihttps://www.doi.org/10.1103/PhysRevLett.128.172005
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85129722971&origin=resultslist
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/27894
dc.relation.ispartofPhysical Review Letters
dc.titlePolarization of ? and ? ¯ Hyperons along the Beam Direction in Pb-Pb Collisions at s NN=5.02 TeV
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue17
oaire.citation.volume128
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