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arXiv 1607.06174hep-thhep-lathep-ph
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手征规范理论的六维正则化

Six-dimensional regularization of chiral gauge theories

Hidenori Fukaya, Tetsuya Onogi, Shota Yamamoto, Ryo Yamamura

摘要:

本文提出了一种用六维狄拉克费米子正则化四维手征规范理论的方法。在我们的公式中,我们考虑了两个不同的质量项,分别在第五和第六方向上具有畴壁轮廓。外尔费米子出现在两个不同畴壁的交界处的局域模。一个畴壁自然地呈现出反常下降方程的Stora-Zumino链,从六维中的轴向U(1)反常开始到四维中的规范反常。另一个畴壁意味着类似的全球异常流入。无反常条件等价于要求六维狄拉克费米子之间的轴向U(1)反常和宇称反常被抵消。由于我们的公式是基于一个巨大的矢量类费米子行列式,非微扰正则化将是可能的晶格。将规范场置于四维交界处,并利用Grabowska和Kaplan最近提出的Yang-Mills梯度流将其推广到体相,我们定义了目标手征规范理论的四维路径积分.

英文摘要:

We propose a regularization of four dimensional chiral gauge theories using six-dimensional Dirac fermions. In our formulation, we consider two different mass terms having domain-wall profiles in the fifth and the sixth directions, respectively. A Weyl fermion appears as a localized mode at the junction of two different domain-walls. One domain-wall naturally exhibits the Stora-Zumino chain of the anomaly descent equations, starting from the axial U(1) anomaly in six-dimensions to the gauge anomaly in four-dimensions. Another domain-wall implies a similar inflow of the global anomalies. The anomaly free condition is equivalent to requiring that the axial U(1) anomaly and the parity anomaly are canceled among the six-dimensional Dirac fermions. Since our formulation is based on a massive vector-like fermion determinant, a non-perturbative regularization will be possible on a lattice. Putting the gauge field at the four-dimensional junction and extending it to the bulk using the Yang-Mills gradient flow, as recently proposed by Grabowska and Kaplan, we define the four-dimensional path integral of the target chiral gauge theory.

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