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Elliptic flow in Pb+Pb collisions at sNN = 2.76 TeV: Hybrid model assessment of the first data

Tetsufumi Hirano, Pasi Huovinen, and Yasushi Nara
Phys. Rev. C 84, 011901(R) – Published 7 July 2011

Abstract

We analyze the elliptic flow parameter v2 in Pb+Pb collisions at sNN = 2.76 TeV and in Au+Au collisions at sNN=200 GeV using a hybrid model in which the evolution of the quark gluon plasma is described by ideal hydrodynamics with a state-of-the-art lattice QCD equation of state, and the subsequent hadronic stage by a hadron cascade model. For initial conditions, we employ Monte Carlo versions of the Glauber and the Kharzeev-Levin-Nardi models and compare results with each other. We demonstrate that the differential elliptic flow v2(pT) hardly changes when the collision energy increases, whereas the integrated v2 increases due to the enhancement of mean transverse momentum. The amount of increase of both v2 and mean pT depends significantly on the model of initialization.

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  • Received 20 December 2010

DOI:https://doi.org/10.1103/PhysRevC.84.011901

©2011 American Physical Society

Authors & Affiliations

Tetsufumi Hirano1,2,*, Pasi Huovinen3,†, and Yasushi Nara4,‡

  • 1Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan
  • 2Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 3Institut für Theoretische Physik, Johann Wolfgang Goethe-Universität, D-60438 Frankfurt am Main, Germany
  • 4Akita International University, Yuwa, Akita-city 010-1292, Japan

  • *hirano@phys.s.u-tokyo.ac.jp
  • huovinen@th.physik.uni-frankfurt.de
  • nara@aiu.ac.jp

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Issue

Vol. 84, Iss. 1 — July 2011

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