Evidence for collectivity in pp collisions at the LHC

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dc.contributor.authorSirunyan, A.M.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorBergauer, T.
dc.contributor.authorDragicevic, M.
dc.contributor.authorErö, J.
dc.contributor.authorEscalante Del Valle, A.
dc.date.accessioned2025-03-23T19:16:34Z
dc.date.available2025-03-23T19:16:34Z
dc.date.issued2017
dc.departmentSinop Üniversitesi
dc.description.abstractMeasurements of two- and multi-particle angular correlations in pp collisions at s=5,7, and 13TeV are presented as a function of charged-particle multiplicity. The data, corresponding to integrated luminosities of 1.0pb−1 (5 TeV), 6.2pb−1 (7 TeV), and 0.7pb−1 (13 TeV), were collected using the CMS detector at the LHC. The second-order (v2) and third-order (v3) azimuthal anisotropy harmonics of unidentified charged particles, as well as v2 of KS 0 and Λ/Λ‾ particles, are extracted from long-range two-particle correlations as functions of particle multiplicity and transverse momentum. For high-multiplicity pp events, a mass ordering is observed for the v2 values of charged hadrons (mostly pions), KS 0, and Λ/Λ‾, with lighter particle species exhibiting a stronger azimuthal anisotropy signal below pT≈2GeV/c. For 13 TeV data, the v2 signals are also extracted from four- and six-particle correlations for the first time in pp collisions, with comparable magnitude to those from two-particle correlations. These observations are similar to those seen in pPb and PbPb collisions, and support the interpretation of a collective origin for the observed long-range correlations in high-multiplicity pp collisions. © 2016 The Author
dc.description.sponsorshipEU-ESF
dc.description.sponsorshipNational Science Foundation, NSF, (1120138, 1151640, 1211067, 1506130, 1506168, 1508869, 1606321, 1624356)
dc.description.sponsorshipNational Science Foundation, NSF
dc.description.sponsorshipAlfred P. Sloan Foundation, APSF
dc.description.sponsorshipWelch Foundation, (C-1845)
dc.description.sponsorshipWelch Foundation
dc.description.sponsorshipAlexander von Humboldt-Stiftung, AvH
dc.identifier.doi10.1016/j.physletb.2016.12.009
dc.identifier.endpage220
dc.identifier.issn0370-2693
dc.identifier.scopus2-s2.0-85007251845
dc.identifier.scopusqualityQ1
dc.identifier.startpage193
dc.identifier.urihttps://doi.org/10.1016/j.physletb.2016.12.009
dc.identifier.urihttps://hdl.handle.net/11486/4145
dc.identifier.volume765
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier B.V.
dc.relation.ispartofPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_Scopus_20250323
dc.subjectCMS
dc.subjectCorrelation
dc.subjectHeavy ion
dc.subjectPhysics
dc.subjectpp
dc.subjectRidge
dc.titleEvidence for collectivity in pp collisions at the LHC
dc.typeArticle

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