The fluidity of a hot hadronic soup

May 20, 2014, 4:30 PM
spectrum (darmstadtium)



Board: A-25
Poster QCD at High Temperature and/or Density Poster session


Dr Anton Wiranata (CCNU)


The ratio η/s of the shear viscosity, η, and the entropy density, s, of hot interacting hadrons is calculated using the Chapman-Enskog and virial expansion methods. Interactions are parametrized using the K-matrix which preserves the unitarity of the S-matrix. In the four component mixture π-K-η-N , 57 resonances up to 2 GeV are included. Increasing number of resonances is shown to reduce η and increase s resulting in a progressive decrease of η/s for temperatures close to the QCD phase transition temperature. Prospects of hot hadrons becoming a “perfect” fluid are discussed.

Primary author

Dr Anton Wiranata (CCNU)


Madappa Prakash (Ohio University) Volker Koch (LBNL) Xin-Nian Wang (Lawrence Berkeley National Lab. (US))

Presentation materials