Show simple item record

dc.contributor.authorALICE Collaboration
dc.contributor.authorChang, BeomSu
dc.contributor.authorKim, Dong Jo
dc.contributor.authorParkkila, Jasper
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.accessioned2019-03-06T11:14:26Z
dc.date.available2019-03-06T11:14:26Z
dc.date.issued2019fi
dc.identifier.citationALICE Collaboration. (2019). Multiplicity dependence of light-flavor hadron production in pp collisions at √s = 7 TeV. <em>Physical Review C</em>, 99 (2), 024906. <a href="https://doi.org/10.1103/PhysRevC.99.024906">doi:10.1103/PhysRevC.99.024906</a>fi
dc.identifier.otherTUTKAID_80829
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/63044
dc.description.abstractComprehensive results on the production of unidentified charged particles, π±, K±, K0S, K∗(892)0, p, ¯p, ϕ(1020), Λ, ¯¯¯Λ, Ξ−, ¯¯¯Ξ+, Ω−, and ¯¯¯Ω+ hadrons in proton-proton (pp) collisions at √s=7 TeV at midrapidity (|y|<0.5) as a function of charged-particle multiplicity density are presented. In order to avoid autocorrelation biases, the actual transverse momentum (pT) spectra of the particles under study and the event activity are measured in different rapidity windows. In the highest multiplicity class, the charged-particle density reaches about 3.5 times the value measured in inelastic collisions. While the yield of protons normalized to pions remains approximately constant as a function of multiplicity, the corresponding ratios of strange hadrons to pions show a significant enhancement that increases with increasing strangeness content. Furthermore, all identified particle-to-pion ratios are shown to depend solely on charged-particle multiplicity density, regardless of system type and collision energy. The evolution of the spectral shapes with multiplicity and hadron mass shows patterns that are similar to those observed in p-Pb and Pb-Pb collisions at Large Hadron Collider energies. The obtained pT distributions and yields are compared to expectations from QCD-based pp event generators as well as to predictions from thermal and hydrodynamic models. These comparisons indicate that traces of a collective, equilibrated system are already present in high-multiplicity pp collisions.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.otherproton-proton collisionsfi
dc.subject.otherhadronsfi
dc.titleMultiplicity dependence of light-flavor hadron production in pp collisions at √s = 7 TeVfi
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201903041724
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2019-03-04T13:15:16Z
dc.description.reviewstatuspeerReviewed
dc.relation.issn2469-9985
dc.relation.numberinseries2
dc.relation.volume99
dc.type.versionpublishedVersion
dc.rights.copyright© 2019 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.99.024906


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

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