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arXiv 1609.08376hep-lathep-th
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手征重叠算符费米子数反常中的洛仑兹对称性破缺

Lorentz symmetry violation in the fermion number anomaly with the chiral overlap operator

Hiroki Makino, Okuto Morikawa

摘要:

最近,Grabowska和Kaplan在手征重叠算符的基础上提出了手征规范理论的四维格点形式。我们计算了费米子数反常的经典连续极限。出乎意料的是,我们发现,连续极限包含一项,这是不是洛伦兹不变。然而,该项与规范反常系数成正比,因此当且仅当反常抵消条件满足时,该晶格公式中的费米子数反常自动恢复洛伦兹不变形式。

英文摘要:

Recently, Grabowska and Kaplan proposed a four-dimensional lattice formulation of chiral gauge theories on the basis of a chiral overlap operator. We compute the classical continuum limit of the fermion number anomaly in this formulation. Unexpectedly, we find that the continuum limit contains a term which is not Lorentz invariant. The term is, however, proportional to the gauge anomaly coefficient, and thus the fermion number anomaly in this lattice formulation automatically restores the Lorentz-invariant form when and only when the anomaly cancellation condition is met.

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