Extraction of the Specific Shear Viscosity of Hot Hadron Gas
arXiv:1807.03410
Abstract
We extract the specific shear viscosity of nuclear matter for various temperatures and chemical potentials in the hadronic phase using data taken in high energy nuclear collisions. We use a blastwave parameterization of the final state of nuclear collisions, including non-equilibrium deformations of particle distributions due to shear stress in the Navier-Stokes approximation. We fit spectra and elliptic flow of identified hadrons for a variety of collision energies and impact parameters at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). The systems analyzed cover a temperature range from about 110 to 140 MeV and vary in their chemical potentials for stable hadrons. We attempt to assign meaningful systematic uncertainties to our results. This work is complementary to efforts using viscous fluid dynamics to extract the specific shear viscosity of quark gluon plasma at higher temperatures. We put our work in context with existing theoretical calculations of the specific shear viscosity.
16 pages, 8 figures, v2: minor update, some fixes to references, changed reference style
References in corpus (9)
- 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?
- On the Strongly-Interacting Low-Viscosity Matter Created in Relativistic Nuclear Collisions
- A calculation of the bulk viscosity in SU(3) gluodynamics
- Hadron spectra and elliptic flow for 200 A GeV Au+Au collisions from viscous hydrodynamics coupled to a Boltzmann cascade
- Temperature dependence of shear viscosity of --gluodynamics within lattice simulation
- Shear viscosity of a hadronic gas mixture
- Quantifying properties of hot and dense QCD matter through systematic model-to-data comparison
- Shear Viscosity to Entropy Density Ratio of QCD below the Deconfinement Temperature