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arXiv 0812.3859hep-phhep-lathep-thnucl-th
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SU中等离子体不稳定性的模拟(3)规范理论

Simulating plasma instabilities in SU(3) gauge theory

J. Berges, D. Gelfand, S. Scheffler, D. Sexty

摘要:

我们在3+1维经典统计格点规范理论中计算了等离子体不稳定性的非平衡动力学。首次对与量子色动力学有关的SU(3)规范群进行了模拟。我们发现一个定性类似的行为相比,早期的研究在SU(2)规范理论。对于给定的能量密度,特征生长速率低约25%,使得各向同性化过程较慢。以特征筛选质量为单位测量,初级生长速率与颜色的数量无关。

英文摘要:

We compute nonequilibrium dynamics of plasma instabilities in classical-statistical lattice gauge theory in 3+1 dimensions. The simulations are done for the first time for the SU(3) gauge group relevant for quantum chromodynamics. We find a qualitatively similar behavior as compared to earlier investigations in SU(2) gauge theory. The characteristic growth rates are about 25 % lower for given energy density, such that the isotropization process is slower. Measured in units of the characteristic screening mass, the primary growth rate is independent of the number of colors.

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