Anisotropic flows and the shear viscosity of the QGP within a transport approach

30th Winter Workshop on Nuclear Dynamics

Plumari, S.^1,2 ; Guardo, G.L.^1,2 ; Puglisi, A.^2 ; Scardina, F.^1,2 ; Greco, V.^1,2

Department of Physics and Astronomy, University of Catania, Via S. Sofia 64, Catania

I-95125, Italy^1

Laboratorio Nazionale Del Sud, INFN-LNS, Via S. Sofia 63, Catania

I-95125, Italy^2

关键词: Anisotropic flows;    Coordinate space;    Flow coefficients;    High order harmonics;    Higher harmonics;    Initial eccentricity;    Spatial anisotropy;    Temperature dependent;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/535/1/012013/pdf
DOI  :  10.1088/1742-6596/535/1/012013

来源: IOP

【 摘 要 】

We study the build up of elliptic flow v2and high order harmonics vnwithin a transport approach at fixed shear viscosity to entropy density ratio η/s and with initial state fluctuations. In particular we study the effect of a temperature dependent η/s for two different beam energies: RHIC for Au+Au at 200 GeV and LHC for Pb + Pb at 2.76 TeV. We find that for the two different beam energies considered the suppression of the elliptic flow and of higher harmonics v3(pT) and v4(pT) due to the viscosity of the medium have different contributions coming from the cross over or QGP phase. Moreover, we discuss the correlation between the initial spatial anisotropies Εnand flow coefficients vn. We observe that the elliptic flow v2is strongly correlated with initial eccentricity Ε2. While higher harmonics v3and v4are weakly correlated to their asymmetry measure in coordinate space Ε3and Ε4.