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Title

Non-Gaussian elliptic-flow fluctuations in PbPb collisions at √sNN = 5.02TeV

AuthorsSirunyan, A. M.; Cabrillo, I. J. ; Calderon, Alicia ; Chazin Quero, B.; Duarte Campderros, J. ; Fernández, M. ; Fernández-Manteca, Pedro; García Alonso, A.; García-Ferrero, J. ; Gómez, G. ; López Virto, A. ; Marco, Jesús ; Martínez-Rivero, Celso ; Martínez Ruiz del Arbol, P. ; Matorras, Francisco ; Piedra, Jonatan ; Prieels, C.; Rodrigo, Teresa ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Trevisani, N. ; Vila, Iván ; Vilar, Rocío
KeywordsEvent-by-event elliptic flow
Non-Gaussian flow fluctuations
Unfolding
Issue Date2019
PublisherElsevier
CitationPhysics Letters B 789: 643-665 (2019)
AbstractEvent-by-event fluctuations in the elliptic-flow coefficient v are studied in PbPb collisions at s=5.02 TeV using the CMS detector at the CERN LHC. Elliptic-flow probability distributions p(v) for charged particles with transverse momentum 0.3<p<3.0GeV/c and pseudorapidity |η|<1.0 are determined for different collision centrality classes. The moments of the p(v) distributions are used to calculate the v coefficients based on cumulant orders 2, 4, 6, and 8. A rank ordering of the higher-order cumulant results and nonzero standardized skewness values obtained for the p(v) distributions indicate non-Gaussian initial-state fluctuations. Bessel–Gaussian and elliptic power fits to the flow distributions are studied to characterize the initial-state spatial anisotropy.
DescriptionThe CMS Collaboration: et al.
Publisher version (URL)https://doi.org/10.1016/j.physletb.2018.11.063
URIhttp://hdl.handle.net/10261/213466
Identifiersdoi: 10.1016/j.physletb.2018.11.063
issn: 0370-2693
e-issn: 1873-2445
Appears in Collections:(IFCA) Artículos
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