Shear viscosity of hadrons with K-matrix cross sections

Abstract

Shear viscosity ηand entropy density s of a hadronic resonance gas are calculated using the Chapman-Enskog and virial expansion methods using the K-matrix parametrization of hadronic cross sections which preserves the unitarity of the T -matrix. In the π-K-N-η- mixture considered, a total of 57 resonances up to 2 GeV were included. Comparisons are also made to results with other hadronic cross sections such as the Breit-Wigner (BW) and, where available, experimental phase shift parametrizations. Hadronic interactions forming resonances are shown to decrease the shear viscosity and increase the entropy density leading to a substantial reduction of η/s as the QCD phase transition temperature is approached.

16 pages and 14 figures

References in corpus (14)

• Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
• Viscosity Information from Relativistic Nuclear Collisions: How Perfect is the Fluid Observed at RHIC?
• The QCD equation of state with dynamical quarks
• On the Strongly-Interacting Low-Viscosity Matter Created in Relativistic Nuclear Collisions
• Quasi-Particle Theory of Shear and Bulk Viscosities of Hadronic Matter
• Effects of initial flow velocity fluctuation in event-by-event (3+1)D hydrodynamics
• Anisotropic flow in sqrt(s)=2.76 TeV Pb+Pb collisions at the LHC
• Inclusive charged hadron elliptic flow in Au + Au collisions at $\sqrt{s_{NN}}$ = 7.7 - 39 GeV
• Azimuthal anisotropy of charged particles at high transverse momenta in PbPb collisions at sqrt(s[NN]) = 2.76 TeV
• Shear Viscosity in a Gluon Gas
• Shear Viscosity to Entropy Density Ratio of QCD below the Deconfinement Temperature
• Elliptic flow in U+U collisions at sqrt{s_{NN}} = 200 GeV and in Pb+Pb collisions at sqrt{s_{NN}} = 2.76 TeV: Prediction from a hybrid approach
• The Bulk Viscosity of a Pion Gas
• Measurement of the azimuthal anisotropy of neutral pions in PbPb collisions at sqrt(s(NN)) = 2.76 TeV

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