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dc.contributor.authorAaboud, Morad
dc.contributor.authorAad, Georges
dc.contributor.authorAbbott, Brad
dc.contributor.authorAbbott, Dale C.
dc.contributor.authorAbdinov, Ovsat Bahram oglu
dc.contributor.authorAbed Abud, Adam
dc.contributor.authorAbhayasinghe, Deshan Kavishka
dc.contributor.authorAbidi, Syed Haider
dc.contributor.authorAbouZeid, Hass
dc.contributor.authorAbraham, Nadine L.
dc.contributor.authorBuanes, Trygve
dc.contributor.authorDjuvsland, Julia Isabell
dc.contributor.authorEigen, Gerald
dc.contributor.authorFomin, Nikolai
dc.contributor.authorLee, Graham Richard
dc.contributor.authorMartin dit Latour, Bertrand
dc.contributor.authorMæland, Steffen
dc.contributor.authorStugu, Bjarne
dc.contributor.authorYang, Zongchang
dc.contributor.authorBugge, Magnar Kopangen
dc.contributor.authorCameron, David Gordon
dc.contributor.authorCatmore, James Richard
dc.contributor.authorFeigl, Simon
dc.contributor.authorGaronne, Vincent
dc.contributor.authorGramstad, Eirik
dc.contributor.authorHellesund, Simen
dc.contributor.authorMorisbak, Vanja
dc.contributor.authorOppen, Henrik
dc.contributor.authorOuld-Saada, Farid
dc.contributor.authorPedersen, Maiken
dc.contributor.authorRead, Alexander Lincoln
dc.contributor.authorRøhne, Ole Myren
dc.contributor.authorSandaker, Heidi
dc.contributor.authorVadla, Knut Oddvar Høie
dc.contributor.authorAbramowicz, Halina
dc.contributor.authorAbreu, Henso
dc.contributor.authorAbulaiti, Yiming
dc.contributor.authorAcharya, Bobby S.
dc.contributor.authorAdachi, Shunsuke
dc.contributor.authorAdam, Lennart
dc.contributor.authorAdam-Bourdarios, Claire
dc.contributor.authorAdamczyk, Leszek
dc.contributor.authorAdamek, Lukas
dc.contributor.authorAdelman, Jareed
dc.contributor.authorAdersberger, Michael
dc.contributor.authorAdigüzel, Aytül
dc.contributor.authorAdorni, Sofia
dc.contributor.authorAdye, Tim
dc.contributor.authorAffolder, Anthony Allen
dc.contributor.authorATLAS, Collaboration
dc.date.accessioned2021-05-10T12:59:40Z
dc.date.available2021-05-10T12:59:40Z
dc.date.created2020-05-17T18:57:49Z
dc.date.issued2020-01-09
dc.PublishedJournal of High Energy Physics (JHEP). 2020, 2020:51 (1), 1-59.
dc.identifier.issn1126-6708
dc.identifier.urihttps://hdl.handle.net/11250/2754711
dc.description.abstractMulti-particle azimuthal cumulants are measured as a function of centrality and transverse momentum using 470 μb−1 of Pb+Pb collisions at sNN−−−√ = 5.02 TeV with the ATLAS detector at the LHC. These cumulants provide information on the event-by-event fluctuations of harmonic flow coefficients vn and correlated fluctuations between two harmonics vn and vm. For the first time, a non-zero four-particle cumulant is observed for dipolar flow, v1. The four-particle cumulants for elliptic flow, v2, and triangular flow, v3, exhibit a strong centrality dependence and change sign in ultra-central collisions. This sign change is consistent with significant non-Gaussian fluctuations in v2 and v3. The four-particle cumulant for quadrangular flow, v4, is found to change sign in mid-central collisions. Correlations between two harmonics are studied with three- and four-particle mixed-harmonic cumulants, which indicate an anti-correlation between v2 and v3, and a positive correlation between v2 and v4. These correlations decrease in strength towards central collisions and either approach zero or change sign in ultra-central collisions. To investigate the possible flow fluctuations arising from intrinsic centrality or volume fluctuations, the results are compared between two different event classes used for centrality definitions. In peripheral and mid-central collisions where the cumulant signals are large, only small differences are observed. In ultra-central collisions, the differences are much larger and transverse momentum dependent. These results provide new information to disentangle flow fluctuations from the initial and final states, as well as new insights on the influence of centrality fluctuations.en_US
dc.language.isoengen_US
dc.publisherSpringeren_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleFluctuations of anisotropic flow in Pb+Pb collisions at √sNN = 5.02 TeV with the ATLAS detectoren_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.description.versionpublishedVersionen_US
dc.rights.holderCopyright CERN, for the benefit of the ATLAS Collaborationen_US
dc.source.articlenumber51en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2
dc.identifier.doi10.1007/JHEP01(2020)051
dc.identifier.cristin1811384
dc.source.journalJournal of High Energy Physics (JHEP)en_US
dc.source.402020:51
dc.source.141
dc.source.pagenumber1-59en_US
dc.subject.nsiVDP::Kjerne- og elementærpartikkelfysikk: 431en_US
dc.subject.nsiVDP::Nuclear and elementary particle physics: 431en_US
dc.identifier.citationJournal of High Energy Physics (JHEP). 2020, 2020:51.en_US
dc.source.volume2020en_US


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