Skewness of elliptic flow fluctuations

Giuliano Giacalone, Li Yan, Jacquelyn Noronha-Hostler, and Jean-Yves Ollitrault
Phys. Rev. C 95, 014913 – Published 24 January 2017

Abstract

Using event-by-event hydrodynamic calculations, we find that the fluctuations of the elliptic flow (v2) in the reaction plane have a negative skew. We compare the skewness of v2 fluctuations to that of initial eccentricity fluctuations. We show that skewness is the main effect lifting the degeneracy between higher-order cumulants, with negative skew corresponding to the hierarchy v2{4}>v2{6} observed in Pb+Pb collisions at the CERN Large Hadron Collider. We describe how the skewness can be measured experimentally and show that hydrodynamics naturally reproduces its magnitude and centrality dependence.

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  • Received 11 August 2016

DOI:https://doi.org/10.1103/PhysRevC.95.014913

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Giuliano Giacalone1, Li Yan1, Jacquelyn Noronha-Hostler2, and Jean-Yves Ollitrault1

  • 1Institut de physique théorique, Université Paris Saclay, CNRS, CEA, F-91191 Gif-sur-Yvette, France
  • 2Department of Physics, University of Houston, Houston Texas 77204, USA

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Issue

Vol. 95, Iss. 1 — January 2017

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