Darmstadt 2016 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 34: Heavy Ion Collision and QCD Phases VIII

HK 34.4: Talk

Wednesday, March 16, 2016, 15:00–15:15, S1/01 A01

Shear viscosity and entropy of a pion gas — •Jean-Bernard Rose, Dmytro Oliinychenko, Anna Schäfer, and Hannah Petersen — FIAS, Goethe University, Frankfurt, Germany

A model of microscopic non-equilibrium dynamics for classical point particles is used to calculate the transport coefficients of dense hadronic matter. Specifically, the shear viscosity to entropy density ratio is investigated, and the temperature dependence between 100 MeV and 300 MeV is explored. Calculations are made at corresponding particle densities going from 0.01 to 0.34 in a pion box simulating infinite matter. The results for the entropy and shear viscosity are then compared to analytic estimates. In addition, massless particles as well as ρ-meson resonance excitations are included. This will be the starting point for the calculation of more transport coefficients as functions of T and µ_B; expanding systems could also be considered.