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Committee for collaboration of Czech Republic

with Joint Institute for Nuclear Research in Dubna Login
Non-Gaussian elliptic-flow fluctuations in PbPb collisions at root S-NN=5.02 TeV

Author
Sirunyan A.M. Yerevan Physics Institute, Armenia
Finger Miroslav, prof. Ing. DrSc. Faculty of Mathematics and Physics, Charles University in Prague
Finger Michael, M.Sc. CSc. Faculty of Mathematics and Physics, Charles University in Prague, JINR Dubna
Korenkov V. JINR
et al.  different institutions

Year
2019

Scientific journal
PHYSICS LETTERS B 789 643-665

Web


Abstract
Event-by-event fluctuations in the elliptic-flow coefficient v(2) are studied in PbPb collisions at root S-NN = 5.02 TeV using the CMS detector at the CERN LHC. Elliptic-flow probability distributions p(v(2)) for charged particles with transverse momentum 0.3 < p(T) < 3.0 GeV/c and pseudorapidity vertical bar eta vertical bar < 1.0 are determined for different collision centrality classes. The moments of the p(v(2)) distributions are used to calculate the v(2) 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(2)) 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. (C) 2018 The Author(s). Published by Elsevier B.V.

Cite article as:
A. Sirunyan, M. Finger, M. Finger, V. Korenkov, . et al., "Non-Gaussian elliptic-flow fluctuations in PbPb collisions at root S-NN=5.02 TeV ", PHYSICS LETTERS B 789 643-665 (2019)