Centrality dependence of mapping the hydrodynamic response to the initial geometry in heavy-ion collisions

Jinghua Fu
Phys. Rev. C 92, 024904 – Published 10 August 2015

Abstract

Event-by-event correlations between vn and ɛm,n for different collision centralities are studied with hydrodynamics. For the more central collisions vn is better correlated with ɛm,n defined with relatively larger radial weight power m, like m=n+1. For the more peripheral collisions, vn prefers ɛm,n with relatively smaller m, like m=n1. When the fluid viscosity is large, vn is better correlated with ɛm,n with large m. For the most central collisions and for odd harmonics, since anisotropy is solely due to fluctuations, the scaled probability distributions of ɛm,n are universal. For noncentral collisions, the scaled probability distributions of ɛm,2 with different radial weight power m deviate from one another. ɛm,2 defined with smaller m has a wider scaled distribution and a larger scaled standard deviation, and is more consistent with the scaled v2 distribution after hydrodynamic evolution in peripheral collisions. Hadronic rescattering widens the v2 distribution in noncentral collisions, which contributes to the observed inconsistency between p(v2) and p(ɛ2) distributions.

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  • Received 2 April 2015
  • Revised 15 July 2015

DOI:https://doi.org/10.1103/PhysRevC.92.024904

©2015 American Physical Society

Authors & Affiliations

Jinghua Fu*

  • Institute of Particle Physics, Central China Normal University, Wuhan 430079, People's Republic of China and Key Laboratory of Quark & Lepton Physics (CCNU), Ministry of Education, People's Republic of China

  • *fujh@mail.ccnu.edu.cn

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Vol. 92, Iss. 2 — August 2015

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