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arXiv 0803.0303hep-th
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混合内部变换和时空变换:一些例子和反例

Mixing internal and spacetime transformations: some examples and counterexamples

R. Percacci

摘要:

本文讨论的问题是,在耦合到引力的规范理论中,内部变换和时空变换是否可以混合。结果表明,如果规范场的VEV是平坦的,对称群总是内部对称性和时空对称性的乘积。另一方面,如果规范场的VEV不是平坦的,就不可能正确地定义"时空“变换的概念;因此,如果对称群是非平凡的,混合一般会发生。

英文摘要:

This note addresses the question whether in a gauge theory coupled to gravity internal and spacetime transformation can be mixed. It is shown that if the VEV of the gauge field is flat, the symmetry group is always a product of internal and spacetime symmetries. On the other hand, if the VEV of the gauge field is not flat it is impossible to properly define the notion of a ``spacetime'' transformation; as a consequence, if the symmetry group is nontrivial, mixing generically occurs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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