Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-07-21
Prog.Theor.Phys.119:991-1004,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, 11 figures
Scientific paper
10.1143/PTP.119.991
We calculate shear viscosity of the quark matter at finite temperature and density. If we assume that the quark interacts with the soft mode, which is a collective mode of quark-antiquark pair, the self energy of the quark is calculated by using the quasi-particle random phase approximation. It is shown that its imaginary part is large and the mean free path of the quark is short. With the use of the Kubo formula, the shear viscosity of quark matter becomes small. The Reynolds number of the quark matter is estimated to be about $3\sim 30$. As the temperature increases, the shear viscosity increases gradually for $T>200{\rm MeV}$. Moreover it is shown that the shear viscosity is not sensitive to the chemical potential.
Fukutome Takahiko
Iwasaki Masaharu
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