Journal
14TH INTERNATIONAL CONFERENCE ON STRANGENESS IN QUARK MATTER (SQM2013)
Volume 509, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1742-6596/509/1/012049
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Funding
- NSFC [11221504, 1350110493]
- US DOE [DE-AC02-05CH11231, DE-FG02-93ER-40756]
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The shear viscosity eta and entropy density 8 of a hadron gas with zero baryon number density are calculated using the Chapman-Enskog and virial expansion approaches, respectively. Interactions are included via the K-matrix parametrization of cross sections preserving the unitarity of the S-matrix. In the four component mixture (pi - K - N - eta), a total of 57 resonances up to 2 GeV mass are included. Interactions forming resonances reduce the magnitude of eta and increase 8, both effects serving to progressively reduce eta/s as the temperature nears the QCD phase transition temperature.
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