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arXiv 0801.3361hep-lathep-phnucl-th
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最小加倍费米子的对称性破缺

Broken Symmetries from Minimally Doubled Fermions

Paulo F. Bedaque, Michael I. Buchoff, Brian C. Tiburzi, Andre Walker-Loud

摘要:

最近文献中提出了新的包含最小量费米子加倍的手征对称费米子作用量。我们研究这些行动的对称性和重整化,并发现在每种情况下,离散的对称性,如奇偶校验和时间反演,明确打破。因此,当包括规范相互作用时,这些理论辐射地产生相关的和边际的算子。因此,恢复这些对称性和接近连续极限需要微调几个参数。在一些假设下,我们证明了这种行为是不可避免的行动显示最小的费米子加倍。

英文摘要:

Novel chirally symmetric fermion actions containing the minimum amount of fermion doubling have been recently proposed in the literature. We study the symmetries and renormalization of these actions and find that in each case, discrete symmetries, such as parity and time-reversal, are explicitly broken. Consequently, when the gauge interactions are included, these theories radiatively generate relevant and marginal operators. Thus the restoration of these symmetries and the approach to the continuum limit require the fine-tuning of several parameters. With some assumptions, we show that this behavior is unavoidable for actions displaying minimal fermion doubling.

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