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arXiv 1807.01249hep-th
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轴向重力:分裂异常的非微扰方法

Axial gravity: a non-perturbative approach to split anomalies

L. Bonora, M. Cvitan, P. Dominis Prester, S. Giaccari, M. Paulisic, T. Stemberga

摘要:

在一个耦合到度规轴张量(MAT)背景的狄拉克费米子场的理论中,使用Schwinger-DeWitt热核技术,我们非微扰地计算了两个(奇宇称)迹异常。这个模型的一个合适的坍缩极限对应于手征费米子与(普通)引力耦合的理论。以这两个计算的轨迹异常的限制,我们验证,他们倾向于相同的表达式,这与已经发现的奇奇偶校验轨迹异常,具有相同的系数。这证实了我们以前在这个问题上的结果。

英文摘要:

In a theory of a Dirac fermion field coupled to a metric-axial-tensor (MAT) background, using a Schwinger-DeWitt heat kernel technique, we compute non-perturbatively the two (odd parity) trace anomalies. A suitable collapsing limit of this model corresponds to a theory of chiral fermions coupled to (ordinary) gravity. Taking this limit on the two computed trace anomalies we verify that they tend to the same expression, which coincides with the already found odd parity trace anomaly, with the identical coefficient. This confirms our previous results on this issue.

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