Bulk viscosity of strange quark matter: Urca versus nonleptonic processes
Bulk viscosity of strange quark matter: Urca versus nonleptonic processes
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DOI：
10.1103/physrevd.75.125004
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发表时间：
2007-03
影响因子：
5
通讯作者：
Basil A. Sa'd;I. Shovkovy;D. Rischke
中科院分区：
文献类型：
--
作者：
Basil A. Sa'd;I. Shovkovy;D. Rischke
本文发展了计算奇异夸克物质体粘滞系数的一般形式。相反的共同信念，nonleptonic过程单独给占主导地位的贡献的体积粘度，列入的Urca过程被证明在中等密度时，特征r-模式振荡频率不太高，发挥了重要作用。详细分析了非轻子过程和Urca过程的相互作用。
A general formalism for calculating the bulk viscosity of strange quark matter is developed. Contrary to the common belief that the nonleptonic processes alone give the dominant contribution to the bulk viscosity, the inclusion of the Urca processes is shown to play an important role at intermediate densities when the characteristic r-mode oscillation frequencies are not too high. The interplay of nonleptonic and Urca processes is analyzed in detail.