The elliptic flow and the shear viscosity of the QGP within a kinetic approach

14th International Conference on Strangeness in Quark Matter

Plumari, S.^1,2 ; Puglisi, A.^2 ; Scardina, F.^1,2 ; Greco, V.^1,2 ; Csernai, L.P.^3

Department of Physics and Astronomy, University of Catania, Via S. Sofia 64, 1-95125 Catania, Italy^1

Laboratorio Nazionale Del Sud, INFN-LNS, Via S. Sofia 63, 1-95125 Catania, Italy^2

Department of Physics and Technology, University of Bergen, Norway^3

关键词: Critical temperatures;    Cross over;    Elliptic flows;    Entropy density;    Kinetic approach;    Temperature dependence;    Temperature dependent;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/509/1/012068/pdf
DOI  :  10.1088/1742-6596/509/1/012068

来源: IOP

【 摘 要 】

We use a relativistic transport approach to study the role of a temperature dependent shear viscosity to entropy density ratio, η/s(T), on the build-up of the elliptic flow, v2. The recent results from = 62.4GeV at RHIC up to 2.76 TeV at LHC have shown an intriguing property of the v2(pT), which appears to be nearly invariant with energy. We show that in our transport approach this surprising behavior can be described by a particular temperature dependence of η/s(T), typical of matter that undergoes a phase transition or a cross-over, with a rise and fall and the minimum close to critical temperature Tc.