Linear and non-linear flow mode in Pb–Pb collisions at √sNN = 2.76 TeV

Abstract
The second and the third order anisotropic flow, V2 and V3, are mostly determined by the corresponding initial spatial anisotropy coefficients, ε2 and ε3, in the initial density distribution. In addition to their dependence on the same order initial anisotropy coefficient, higher order anisotropic flow, Vn(n>3), can also have a significant contribution from lower order initial anisotropy coefficients, which leads to mode-coupling effects. In this Letter we investigate the linear and non-linear modes in higher order anisotropic flow Vn for n=4, 5, 6 with the ALICE detector at the Large Hadron Collider. The measurements are done for particles in the pseudorapidity range |n| < 0.8 and the transverse momentum range 0.2 < pT < 5.0 GeV/c as a function of collision centrality. The results are compared with theoretical calculations and provide important constraints on the initial conditions, including initial spatial geometry and its fluctuations, as well as the ratio of the shear viscosity to entropy density of the produced system.
Main Author
Format
Articles Research article
Published
2017
Series
Subjects
Publication in research information system
Publisher
Elsevier B.V.
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-201709013640Use this for linking
Review status
Peer reviewed
ISSN
0370-2693
DOI
https://doi.org/10.1016/j.physletb.2017.07.060
Language
English
Published in
Physics Letters B
Citation
License
CC BY 4.0Open Access
Copyright© 2017 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license. Funded by SCOAP3.

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