dc.contributor.author ALICE Collaboration dc.date.accessioned 2018-11-06T12:57:06Z dc.date.available 2018-11-06T12:57:06Z dc.date.issued 2018 dc.identifier.citation ALICE Collaboration. (2018). Neutral pion and η meson production at midrapidity in Pb-Pb collisions at √sNN = 2.76 TeV. Physical Review C, 98(4), Article 044901. https://doi.org/10.1103/PhysRevC.98.044901 dc.identifier.other CONVID_28696540 dc.identifier.other TUTKAID_79366 dc.identifier.uri https://jyx.jyu.fi/handle/123456789/60126 dc.description.abstract Neutral pion and fi 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. dc.format.mimetype application/pdf dc.language.iso eng dc.publisher American Physical Society dc.relation.ispartofseries Physical Review C dc.rights CC BY 4.0 dc.subject.other pions dc.subject.other eta mesons dc.subject.other heavy ion collisions dc.title Neutral pion and η meson production at midrapidity in Pb-Pb collisions at √sNN = 2.76 TeV dc.type article dc.identifier.urn URN:NBN:fi:jyu-201810314579 dc.contributor.laitos Fysiikan laitos fi dc.contributor.laitos Department of Physics en dc.type.uri http://purl.org/eprint/type/JournalArticle dc.date.updated 2018-10-31T13:15:08Z dc.description.reviewstatus peerReviewed dc.relation.issn 2469-9985 dc.relation.numberinseries 4 dc.relation.volume 98 dc.type.version publishedVersion dc.rights.copyright © 2018 CERN, for the ALICE Collaboration dc.rights.accesslevel openAccess fi dc.subject.yso hiukkasfysiikka dc.format.content fulltext jyx.subject.uri http://www.yso.fi/onto/yso/p15576 dc.rights.url https://creativecommons.org/licenses/by/4.0/ dc.relation.doi 10.1103/PhysRevC.98.044901
﻿

### This item appears in the following Collection(s)

Except where otherwise noted, this item's license is described as CC BY 4.0