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

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2019) Non-Gaussian elliptic-flow fluctuations in PbPb collisions at √sNN = 5.02 TeV. Physics Letters, Section B, 789. pp. 643-665. ISSN 0370-2693

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Abstract

Event-by-event fluctuations in the elliptic-flow coefficient v2 are studied in PbPb collisions at √sNN = 5.02 TeV using the CMS detector at the CERN LHC. Elliptic-flow probability distributions p(v2) for charged particles with transverse momentum 0.3 < pT < 3.0 GeV/c and pseudorapidity |η| < 1.0 are determined for different collision centrality classes. The moments of the p(v2) distributions are used to calculate the v2 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(v2) distributions indicate nonGaussian initial-state fluctuations. Bessel–Gaussian and elliptic power fits to the flow distributions are studied to characterize the initial-state spatial anisotropy.

Item Type:	Article (Journal)
Additional Information:	7861/71808
Uncontrolled Keywords:	Event-by-event elliptic flow; Non-Gaussian flow fluctuations; Unfolding
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	25 Apr 2019 10:51
Last Modified:	12 Jul 2019 10:23
URI:	http://irep.iium.edu.my/id/eprint/71808

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