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dc.contributor.authorALICE Collaboration
dc.contributor.authorChang, BeomSu
dc.contributor.authorKim, Dong Jo
dc.contributor.authorRak, Jan
dc.contributor.authorSlupecki, Maciej
dc.contributor.authorSnellman, Tomas
dc.contributor.authorTrzaska, Wladyslaw
dc.contributor.authorVargyas, Márton
dc.contributor.authorViinikainen, Jussi
dc.date.accessioned2018-11-06T12:57:06Z
dc.date.available2018-11-06T12:57:06Z
dc.date.issued2018fi
dc.identifier.citationALICE Collaboration. (2018). Neutral pion and η meson production at midrapidity in Pb-Pb collisions at √sNN = 2.76 TeV. <em>Physical Review C</em>, 98 (4), 044901. <a href="https://doi.org/10.1103/PhysRevC.98.044901">doi:10.1103/PhysRevC.98.044901</a>fi
dc.identifier.otherTUTKAID_79366
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/60126
dc.description.abstractNeutral pion and η meson production in the transverse momentum range 1 < p T < 20 GeV / c have been measured at midrapidity by the ALICE experiment at the Large Hadron Collider (LHC) in central and semicentral Pb-Pb collisions at √ s NN = 2.76 TeV. These results were obtained using the photon conversion method as well as the Photon Spectrometer (PHOS) and Electromagnetic Calorimeter detectors. The results extend the upper p T reach of the previous ALICE π 0 measurements from 12 to 20 GeV / c and present the first measurement of η meson production in heavy-ion collisions at the LHC. The η / π 0 ratio is similar for the two centralities and reaches at high p T a plateau value of 0.457 ± 0 . 013 stat ± 0 . 018 syst . A suppression of similar magnitude for π 0 and η meson production is observed in Pb-Pb collisions with respect to their production in p p collisions scaled by the number of binary nucleon-nucleon collisions. We discuss the results in terms of Next to Leading Order (NLO) pQCD predictions and hydrodynamic models. The measurements show a stronger suppression than observed at lower center-of-mass energies in the p T range 6 < p T < 10 GeV / c . For p T < 3 GeV / c , hadronization models describe the π 0 results while for the η some tension is observed.fi
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review C
dc.rightsCC BY 4.0
dc.subject.otherhiukkasfysiikkafi
dc.subject.otherparticle physicsfi
dc.subject.otherpionsfi
dc.subject.othereta mesonsfi
dc.subject.otherheavy ion collisionsfi
dc.titleNeutral pion and η meson production at midrapidity in Pb-Pb collisions at √sNN = 2.76 TeVfi
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201810314579
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2018-10-31T13:15:08Z
dc.description.reviewstatuspeerReviewed
dc.relation.issn2469-9985
dc.relation.numberinseries4
dc.relation.volume98
dc.type.versionpublishedVersion
dc.rights.copyright© 2018 CERN, for the ALICE Collaboration
dc.rights.accesslevelopenAccessfi
dc.format.contentfulltext
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.1103/PhysRevC.98.044901


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