Show simple item record

dc.contributor.authorALICE Collaboration
dc.contributor.authorChang, BeomSu
dc.contributor.authorKim, Dong Jo
dc.contributor.authorRak, Jan
dc.contributor.authorRäsänen, Sami
dc.contributor.authorSlupecki, Maciej
dc.contributor.authorSnellman, Tomas
dc.contributor.authorTrzaska, Wladyslaw
dc.contributor.authorVargyas, Márton
dc.contributor.authorViinikainen, Jussi
dc.date.accessioned2017-10-04T10:18:41Z
dc.date.available2017-10-04T10:18:41Z
dc.date.issued2017
dc.identifier.citationALICE Collaboration. (2017). Evolution of the longitudinal and azimuthal structure of the near-side jet peak in Pb-Pb collisions at √sNN = 2.76 TeV. <em>Physical Review C</em>, 96 (3), 034904. <a href="https://doi.org/10.1103/PhysRevC.96.034904">doi:10.1103/PhysRevC.96.034904</a>
dc.identifier.otherTUTKAID_75174
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/55547
dc.description.abstractIn two-particle angular correlation measurements, jets give rise to a near-side peak, formed by particles associated to a higher-pT trigger particle. Measurements of these correlations as a function of pseudorapidity (η) and azimuthal (ϕ) differences are used to extract the centrality and pT dependence of the shape of the near-side peak in the pT range 1 < pT < 8 GeV/c in Pb-Pb and pp collisions at √sNN = 2.76 TeV. A combined fit of the near-side peak and long-range correlations is applied to the data and the peak shape is quantified by the variance of the distributions. While the width of the peak in the ϕ direction is almost independent of centrality, a significant broadening in the η direction is found from peripheral to central collisions. This feature is prominent for the low-pT region and vanishes above 4 GeV/c. The widths measured in peripheral collisions are equal to those in pp collisions in the ϕ direction and above 3 GeV/c in the η direction. Furthermore, for the 10% most central collisions and 1 < pT,assoc < 2 GeV/c, 1 < pT,trig < 3 GeV/c, a departure from a Gaussian shape is found: a depletion develops around the center of the peak. The results are compared to A Multi-Phase Transport (AMPT) model simulation as well as other theoretical calculations indicating that the broadening and the development of the depletion are connected to the strength of radial and longitudinal flow.
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review C
dc.subject.otherhiukkasfysiikka
dc.subject.otherparticle physics
dc.subject.otherPb-Pb collisions
dc.subject.othernear-side jet peak
dc.titleEvolution of the longitudinal and azimuthal structure of the near-side jet peak in Pb-Pb collisions at √sNN = 2.76 TeV
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201710023894
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2017-10-02T09:15:09Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.relation.issn2469-9985
dc.relation.volume96
dc.type.versionpublishedVersion
dc.rights.copyright© 2017 CERN, for the ALICE Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License.
dc.rights.accesslevelopenAccessfi
dc.rights.urlhttps://creativecommons.org/licenses/by/3.0/
dc.relation.doi10.1103/PhysRevC.96.034904


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

© 2017 CERN, for the ALICE Collaboration. Published by the American Physical Society under the terms of the
Creative Commons Attribution 3.0 License.
Except where otherwise noted, this item's license is described as © 2017 CERN, for the ALICE Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License.