Show simple item record

dc.contributor.authorALICE Collaboration
dc.contributor.authorChang, BeomSu
dc.contributor.authorKim, Dong Jo
dc.contributor.authorKral, Jiri
dc.contributor.authorPohjoisaho, Esko
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.accessioned2015-07-14T10:17:33Z
dc.date.available2015-07-14T10:17:33Z
dc.date.issued2015fi
dc.identifier.citationALICE Collaboration. (2015). Centrality dependence of particle production in p&#8722;Pb collisions at &#8730;sNN = 5.02 TeV. <em>Physical Review C</em>, 91 (6), 064905. <a href="http://dx.doi.org/10.1103/PhysRevC.91.064905">doi:10.1103/PhysRevC.91.064905</a>fi
dc.identifier.otherTUTKAID_66542
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/46506
dc.description.abstractWe report measurements of the primary charged-particle pseudorapidity density and transverse momentum distributions in p-Pb collisions at √sNN = 5.02 TeV and investigate their correlation with experimental observables sensitive to the centrality of the collision. Centrality classes are defined by using different event-activity estimators, i.e., charged-particle multiplicities measured in three different pseudorapidity regions as well as the energy measured at beam rapidity (zero degree). The procedures to determine the centrality, quantified by the number of participants (Npart) or the number of nucleon-nucleon binary collisions (Ncoll) are described. We show that, in contrast to Pb-Pb collisions, in p-Pb collisions large multiplicity fluctuations together with the small range of participants available generate a dynamical bias in centrality classes based on particle multiplicity. We propose to use the zero-degree energy, which we expect not to introduce a dynamical bias, as an alternative event-centrality estimator. Based on zero-degree energy-centrality classes, the Npart dependence of particle production is studied. Under the assumption that the multiplicity measured in the Pb-going rapidity region scales with the number of Pb participants, an approximate independence of the multiplicity per participating nucleon measured at mid-rapidity of the number of participating nucleons is observed. Furthermore, at high-pT the p-Pb spectra are found to be consistent with the pp spectra scaled by Ncoll for all centrality classes. Our results represent valuable input for the study of the event-activity dependence of hard probes in p-Pb collisions and, hence, help to establish baselines for the interpretation of the Pb-Pb data.fi
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review C
dc.subject.otherp-Pb collisionsfi
dc.subject.othercharged-particle productionfi
dc.subject.othercentralityfi
dc.titleCentrality dependence of particle production in p−Pb collisions at √sNN = 5.02 TeVfi
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201507072546
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2015-07-07T15:15:04Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.relation.issn0556-2813
dc.relation.numberinseries6
dc.relation.volume91
dc.type.versionpublishedVersion
dc.rights.copyright© 2015 CERN, for the ALICE Collaboration. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
dc.rights.accesslevelopenAccessfi
dc.rights.urlhttp://creativecommons.org/licenses/by/3.0/
dc.relation.doi10.1103/PhysRevC.91.064905


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

© 2015 CERN, for the ALICE Collaboration. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Except where otherwise noted, this item's license is described as © 2015 CERN, for the ALICE Collaboration. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.