Linear and cubic response to the initial eccentricity in heavy-ion collisions

Jacquelyn Noronha-Hostler, Li Yan, Fernando G. Gardim, and Jean-Yves Ollitrault
Phys. Rev. C 93, 014909 – Published 22 January 2016

Abstract

We study the relation between elliptic flow, v2, and the initial eccentricity, ɛ2, in heavy-ion collisions, using hydrodynamic simulations. Significant deviations from linear eccentricity scaling are seen in more peripheral collisions. We identify the mechanism responsible for these deviations as a cubic response, which we argue is a generic property of the hydrodynamic response to the initial density profile. The cubic response increases elliptic flow fluctuations, thereby improving agreement of initial condition models with experimental data.

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  • Received 13 November 2015
  • Revised 8 January 2016

DOI:https://doi.org/10.1103/PhysRevC.93.014909

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Jacquelyn Noronha-Hostler1, Li Yan2, Fernando G. Gardim3, and Jean-Yves Ollitrault2

  • 1Department of Physics, Columbia University, New York, New York 10027, USA
  • 2Institut de physique théorique, Université Paris Saclay, CNRS, CEA, F-91191 Gif-sur-Yvette, France
  • 3Instituto de Ciência e Tecnologia, Universidade Federal de Alfenas, Cidade Universitária, 37715-400 Poços de Caldas, Minas Gerais, Brazil

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Issue

Vol. 93, Iss. 1 — January 2016

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