The QGP shear viscosity-elusive goal or just around the corner?


Journal Article

With the new viscous hydrodynamic + hadron cascade hybrid code VISHNU, a rather precise (25%) extraction of the quark gluon plasma (QGP) shear viscosity (η/s)QGP from heavy-ion elliptic flow data is possible if the initial eccentricity of the collision fireball is known with <5% accuracy. At this point, eccentricities from initial state models differ by up to 20%, leading to an (100%) uncertainty for (η/s)QGP. It is shown that a simultaneous comparison of elliptic and triangular flow, v2 and v3, puts strong constraints on initial state models and can largely eliminate the present uncertainty in (η/s)QGP. The variation of the differential elliptic flow v2(pT) for identified hadrons between RHIC and LHC energies provides additional tests of the evolution model. © 2011 IOP Publishing Ltd.

Full Text

Duke Authors

Cited Authors

  • Shen, C; Bass, SA; Hirano, T; Huovinen, P; Qiu, Z; Song, H; Heinz, U

Published Date

  • December 1, 2011

Published In

Volume / Issue

  • 38 / 12

Electronic International Standard Serial Number (EISSN)

  • 1361-6471

International Standard Serial Number (ISSN)

  • 0954-3899

Digital Object Identifier (DOI)

  • 10.1088/0954-3899/38/12/124045

Citation Source

  • Scopus