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dc.contributor.authorALICE Collaboration
dc.date.accessioned2017-06-29T11:15:12Z
dc.date.available2017-06-29T11:15:12Z
dc.date.issued2017
dc.identifier.citationALICE Collaboration. (2017). Azimuthally Differential Pion Femtoscopy in Pb-Pb Collisions at √sNN = 2.76 TeV. <i>Physical Review Letters</i>, <i>118</i>(22), Article 222301. <a href="https://doi.org/10.1103/PhysRevLett.118.222301" target="_blank">https://doi.org/10.1103/PhysRevLett.118.222301</a>
dc.identifier.otherCONVID_27084828
dc.identifier.otherTUTKAID_74247
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/54721
dc.description.abstractWe present the first azimuthally differential measurements of the pion source size relative to the second harmonic event plane in Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon pair of √ s N N = 2.76     TeV . The measurements have been performed in the centrality range 0%–50% and for pion pair transverse momenta 0.2 < k T < 0.7     GeV / c . We find that the R side and R out radii, which characterize the pion source size in the directions perpendicular and parallel to the pion transverse momentum, oscillate out of phase, similar to what was observed at the Relativistic Heavy Ion Collider. The final-state source eccentricity, estimated via R side oscillations, is found to be significantly smaller than the initial-state source eccentricity, but remains positive—indicating that even after a stronger expansion in the in-plane direction, the pion source at the freeze-out is still elongated in the out-of-plane direction. The 3 + 1 D hydrodynamic calculations are in qualitative agreement with observed centrality and transverse momentum R side oscillations, but systematically underestimate the oscillation magnitude.
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review Letters
dc.subject.otherPb-Pb collisions
dc.subject.otherpions
dc.titleAzimuthally Differential Pion Femtoscopy in Pb-Pb Collisions at √sNN = 2.76 TeV
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201706213009
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2017-06-21T12:15:11Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.relation.issn0031-9007
dc.relation.numberinseries22
dc.relation.volume118
dc.type.versionpublishedVersion
dc.rights.copyright© 2017 CERN, for the ALICE Collaboration. This is an open access article distributed under the terms of a Creative Commons License.
dc.rights.accesslevelopenAccessfi
dc.subject.ysohiukkasfysiikka
jyx.subject.urihttp://www.yso.fi/onto/yso/p15576
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.1103/PhysRevLett.118.222301


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© 2017 CERN, for the ALICE Collaboration. This is an open access article distributed under the terms of a Creative Commons License.
Except where otherwise noted, this item's license is described as © 2017 CERN, for the ALICE Collaboration. This is an open access article distributed under the terms of a Creative Commons License.