Effect of Soft Mode on Shear Viscosity of Quark Matter(Nuclear Physics)
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概要
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We calculate the shear viscosity of quark matter at finite temperature and density. If we assume that the quark interacts with the soft mode, which is a collective mode of a quark-antiquark pair, the self-energy of the quark is calculated by quasi-particle random phase approximation. It is shown that its imaginary part is large and its mean free path is short. With the use of the Kubo formula, the shear viscosity of quark matter decreases. The Reynolds number of quark matter is estimated to be about 10. As temperature increases, shear viscosity increases gradually for T>200 MeV. Moreover it is shown that the shear viscosity also increases with the chemical potential for μ>200 MeV.
- 2008-06-25
著者
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Iwasaki Masaharu
Department Of Material Science Kochi University
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FUKUTOME Takahiko
Department of Physics, Kochi University
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Fukutome Takahiko
Department Of Physics Kochi University
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Iwasaki Masaharu
Department Of Applied Mathematics Faculty Of Engineering Science Osaka University
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