Gauge invariance of the color-superconducting gap on the mass shell

Gauge invariance of the color-superconducting gap on the mass shell
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DOI:
10.1016/s0375-9474(02)00702-9
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发表时间:
2001-11
期刊:
Nuclear Physics
影响因子:
--
通讯作者:
R. Pisarski;D. Rischke
R. Pisarski;D. Rischke
中科院分区:
其他
文献类型:
--
作者:
R. Pisarski;D. Rischke

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色超导的差距参数至少在适当的质量壳层上是一个规范不变量。通过计算QCD耦合常数g中次超前阶的差距,我们证明了1/g中指数的前因子与质量壳的规范有关,而与质量壳的规范无关。
The gap parameter for color superconductivity is expected to be a gauge invariant quantity, at least on the appropriate mass shell. Computing the gap to subleading order in the QCD coupling constant, g, we show that the prefactor of the exponential in 1/g is gauge dependent off the mass shell, and independent of gauge on the mass shell.