Calculation of bulk viscosity of QCD at zero temperature and finite chemical potential

Details Calculation of bulk viscosity of QCD at zero temperature and finite chemical potential Calculation of bulk viscosity of QCD at zero temperature and finite chemical potential

2011-07-26

arxiv.org/abs/1107.5113v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 1 figure, 1 table

Scientific paper

In this letter, based on Kubo's formula and the QCD low energy theorem, we propose a direct formula for calculating the bulk viscosity of QCD at finite chemical potential $\mu$ and zero temperature. According to this formula, the bulk viscosity at finite $\mu$ is totally determined by the dressed quark propagator at finite $\mu$. We then use a dynamical, confining Dyson-Schwinger equation model of QCD to calculate the bulk viscosity at finite $\mu$. It is found that no sharp peak behavior of the bulk viscosity at finite $\mu$ is observed, which is quite different from that of the bulk viscosity at finite temperature.

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