dc.contributor.author ALICE Collaboration dc.date.accessioned 2019-03-07T09:42:06Z dc.date.available 2019-03-07T09:42:06Z dc.date.issued 2019 dc.identifier.citation ALICE Collaboration. (2019). Suppression of Λ(1520) resonance production in central Pb-Pb collisions at √sNN = 2.76 TeV. Physical Review C, 99(2), Article 024905. https://doi.org/10.1103/PhysRevC.99.024905 dc.identifier.other CONVID_28954139 dc.identifier.other TUTKAID_80862 dc.identifier.uri https://jyx.jyu.fi/handle/123456789/63060 dc.description.abstract The production yield of the Λ(1520) baryon resonance is measured at midrapidity in Pb-Pb collisions at √sNN = 2.76 TeV with the ALICE detector at the Large Hadron Collider (LHC). The measurement is performed in the Λ(1520)→ pK− (and charge conjugate) hadronic decay channel as a function of the transverse momentum (pT) and collision centrality. The ratio of the pT-integrated production of Λ(1520) baryons relative to Λ baryons in central collisions is suppressed by about a factor of 2 with respect to peripheral collisions. This is the first observation of the suppression of a baryonic resonance at the LHC and the first 3σ evidence of Λ(1520) suppression within a single collision system. The measured Λ(1520)/Λ ratio in central collisions is smaller than the value predicted by the statistical hadronization model calculations. The shape of the measured pT distribution and the centrality dependence of the suppression are reproduced by the EPOS3 Monte Carlo event generator. The measurement adds further support to the formation of a dense hadronic phase in the final stages of the evolution of the fireball created in heavy-ion collisions, lasting long enough to cause a significant reduction in the observable yield of short-lived resonances. fi 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 heavy ion collisions dc.subject.other lambda baryons dc.title Suppression of Λ(1520) resonance production in central Pb-Pb collisions at √sNN = 2.76 TeV dc.type article dc.identifier.urn URN:NBN:fi:jyu-201903061759 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 2019-03-06T13:15:22Z dc.description.reviewstatus peerReviewed dc.relation.issn 2469-9985 dc.relation.numberinseries 2 dc.relation.volume 99 dc.type.version publishedVersion dc.rights.copyright ©2019 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.99.024905
﻿

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

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