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arXiv 0912.4007hep-th
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手征规范理论中的规范anomaly相消

Gauge anomaly cancellation in chiral gauge theories

Gabriel Di Lemos Santiago Lima, Rafael Chaves Souto Araujo, Sebastiao Alves Dias

摘要:

我们考虑手征费米子与阿贝尔和非阿贝尔规范场的最小相互作用。使用路径积分的方法和探索的对称性恢复机制的后果,我们表明,规范异常在真空中的零期望值的两种情况下(阿贝尔和非阿贝尔)。我们认为,同样的机制不可能消除手征反常,这消除了手征和规范对称性之间的竞争在全量子水平。我们还表明,插入的规范异常在任意规范不变的标量给出了一个零的结果,这指向异常取消的物理状态矢量的子空间。

英文摘要:

We consider chiral fermions interacting minimally with abelian and non-abelian gauge fields. Using a path integral approach and exploring the consequences of a mechanism of symmetry restoration, we show that the gauge anomaly has null expectation value in the vacuum for both cases (abelian and non-abelian). We argue that the same mechanism has no possibility to cancel the chiral anomaly, what eliminates competition between chiral and gauge symmetry at full quantum level. We also show that the insertion of the gauge anomaly in arbitrary gauge invariant correlators gives a null result, which points towards anomaly cancellation in the subspace of physical state vectors.

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