Anisotropic flows and the shear viscosity of the QGP within a transport approach with initial state fluctuations.

20 May 2014, 16:30
spectrum (darmstadtium)



Board: H-28
Poster Collective Dynamics Poster session


Salvatore Plumari (University of Catania (Italy)) Vincenzo Greco (University of Catania)


We discuss the build up of elliptic flow and high order harmonics $v_n$ within a transport approach at fixed shear viscosity to entropy density ratio and with initial state fluctuations. We show, exploring the $T$ dependence of $\eta/s$, that a study of $v_n$ in a wide $p_T$ range allows to understand the difference behind the collective flows at LHC respect to RHIC. Furthermore we present novel results about the impact of $\eta/s$ on the correlations between the initial space eccentricity $\epsilon_n$ and the final anisotropic flows $v_n$. In particular we study the effect of a temperature dependent $\eta/s$ at different beam energies from RHIC for $Au+Au$ at $\sqrt{s}= 62.4, 200$ GeV to LHC energies for $Pb+Pb$ at $\sqrt{s}= 2.76$ TeV. We find that for the different beam energies considered the suppression of the elliptic flow due to the viscosity of the medium has different contaminations coming from the hadronic or QGP phase depending on the average energy of the system. References [1] S. Plumari, V. Greco and L.P. Csernai, arXiv:1304.6566 [nucl-th]. [2] M. Ruggieri, F. Scardina, S. Plumari and V. Greco, Phys.Lett. B727 (2013) 177-181. [3] S. Plumari, A. Puglisi, F. Scardina and V. Greco, Phys.Rev. C86 (2012) 054902.

Primary authors

Salvatore Plumari (University of Catania (Italy)) Vincenzo Greco (University of Catania)


Mr Armando Puglisi (University of Catania, Italy) Mr Luca Guardo (University of Catania, Italy) francesco scardina (INFN Catania)

Presentation Materials