4.5 Article

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

Journal

PHYSICAL REVIEW C
Volume 84, Issue 1, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.84.011901

Keywords

-

Funding

  1. Japan Society for the Promotion of Science [21-3383]
  2. ExtreMe Matter Institute (EMMI)
  3. BMBF [06FY9092]
  4. [22740151]
  5. [20540276]
  6. Grants-in-Aid for Scientific Research [22740151, 20540276] Funding Source: KAKEN

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We analyze the elliptic flow parameter upsilon(2) in Pb+Pb collisions at root S-NN = 2.76 TeV and in Au+Au collisions at root S-NN = 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 upsilon(2)( p(T)) hardly changes when the collision energy increases, whereas the integrated upsilon(2) increases due to the enhancement of mean transverse momentum. The amount of increase of both upsilon(2) and mean p(T) depends significantly on the model of initialization.

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