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dc.date.accessioned2021-03-05T20:43:17Z
dc.date.available2021-03-05T20:43:17Z
dc.date.created2020-05-17T18:57:49Z
dc.date.issued2020
dc.identifier.citationAaboud, Morad Aad, Georges Abbott, Brad Abbott, Dale C. Abdinov, Ovsat Bahram oglu Abed Abud, Adam Abhayasinghe, Deshan Kavishka Abidi, Syed Haider AbouZeid, Hass Abraham, Nadine L. Buanes, Trygve Djuvsland, Julia Isabell Eigen, Gerald Fomin, Nikolai Lee, Graham Richard Martin dit Latour, Bertrand Mæland, Steffen Stugu, Bjarne Yang, Zongchang Bugge, Magnar Kopangen Cameron, David Gordon Catmore, James Richard Feigl, Simon Garonne, Vincent Gramstad, Eirik Hellesund, Simen Morisbak, Vanja Oppen, Henrik Ould-Saada, Farid Pedersen, Maiken Read, Alexander Lincoln Røhne, Ole Myren Sandaker, Heidi Vadla, Knut Oddvar Høie Abramowicz, Halina Abreu, Henso Abulaiti, Yiming Acharya, Bobby S. Adachi, Shunsuke Adam, Lennart Adam-Bourdarios, Claire Adamczyk, Leszek Adamek, Lukas Adelman, Jareed Adersberger, Michael Adigüzel, Aytül Adorni, Sofia Adye, Tim Affolder, Anthony Allen ATLAS, Collaboration . Fluctuations of anisotropic flow in Pb+Pb collisions at √sNN−−− = 5.02 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). 2020, 2020:51(1), 1-59
dc.identifier.urihttp://hdl.handle.net/10852/83720
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.
dc.languageEN
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleFluctuations of anisotropic flow in Pb+Pb collisions at √sNN−−− = 5.02 TeV with the ATLAS detector
dc.typeJournal article
dc.creator.authorAaboud, Morad
dc.creator.authorAad, Georges
dc.creator.authorAbbott, Brad
dc.creator.authorAbbott, Dale C.
dc.creator.authorAbdinov, Ovsat Bahram oglu
dc.creator.authorAbed Abud, Adam
dc.creator.authorAbhayasinghe, Deshan Kavishka
dc.creator.authorAbidi, Syed Haider
dc.creator.authorAbouZeid, Hass
dc.creator.authorAbraham, Nadine L.
dc.creator.authorBuanes, Trygve
dc.creator.authorDjuvsland, Julia Isabell
dc.creator.authorEigen, Gerald
dc.creator.authorFomin, Nikolai
dc.creator.authorLee, Graham Richard
dc.creator.authorMartin dit Latour, Bertrand
dc.creator.authorMæland, Steffen
dc.creator.authorStugu, Bjarne
dc.creator.authorYang, Zongchang
dc.creator.authorBugge, Magnar Kopangen
dc.creator.authorCameron, David Gordon
dc.creator.authorCatmore, James Richard
dc.creator.authorFeigl, Simon
dc.creator.authorGaronne, Vincent
dc.creator.authorGramstad, Eirik
dc.creator.authorHellesund, Simen
dc.creator.authorMorisbak, Vanja
dc.creator.authorOppen, Henrik
dc.creator.authorOuld-Saada, Farid
dc.creator.authorPedersen, Maiken
dc.creator.authorRead, Alexander Lincoln
dc.creator.authorRøhne, Ole Myren
dc.creator.authorSandaker, Heidi
dc.creator.authorVadla, Knut Oddvar Høie
dc.creator.authorAbramowicz, Halina
dc.creator.authorAbreu, Henso
dc.creator.authorAbulaiti, Yiming
dc.creator.authorAcharya, Bobby S.
dc.creator.authorAdachi, Shunsuke
dc.creator.authorAdam, Lennart
dc.creator.authorAdam-Bourdarios, Claire
dc.creator.authorAdamczyk, Leszek
dc.creator.authorAdamek, Lukas
dc.creator.authorAdelman, Jareed
dc.creator.authorAdersberger, Michael
dc.creator.authorAdigüzel, Aytül
dc.creator.authorAdorni, Sofia
dc.creator.authorAdye, Tim
dc.creator.authorAffolder, Anthony Allen
dc.creator.authorATLAS, Collaboration
cristin.unitcode185,15,4,0
cristin.unitnameFysisk institutt
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2
dc.identifier.cristin1811384
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of High Energy Physics (JHEP)&rft.volume=2020:51&rft.spage=1&rft.date=2020
dc.identifier.jtitleJournal of High Energy Physics (JHEP)
dc.identifier.volume2020
dc.identifier.issue1
dc.identifier.doihttps://doi.org/10.1007/JHEP01(2020)051
dc.identifier.urnURN:NBN:no-86443
dc.subject.nviVDP::Kjerne- og elementærpartikkelfysikk: 431
dc.type.documentTidsskriftartikkel
dc.type.peerreviewedPeer reviewed
dc.source.issn1126-6708
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/83720/1/Aaboud2020_Article_FluctuationsOfAnisotropicFlowI.pdf
dc.type.versionPublishedVersion
cristin.articleid51
dc.relation.projectNFR/310713


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