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arXiv 0709.3656hep-lat
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具有精确规范不变性的U(1)手征格点规范理论中费米子测度项的简单构造

A simple construction of fermion measure term in U(1) chiral lattice gauge theories with exact gauge invariance

Daisuke Kadoh, Yoshio Kikukawa

摘要:

在U(1)手征格点规范理论基于Ginsparg-Wilson关系的规范不变量表述中,费米子测度的规范场依赖性是通过所谓的测度项来确定的。我们在有限体积格上导出了测度项的一个封闭公式。链接字段的威尔逊线自由度(torons)被单独处理,以照顾的整体可积性。局部计数器项是明确地构造与局部电流与有限体积中的规范异常的上同调平凡的部分。所得公式与已知的无限体积中单参数积分的测度项表达式非常接近,在实际应用中具有一定的实用价值。

英文摘要:

In the gauge invariant formulation of U(1) chiral lattice gauge theories based on the Ginsparg-Wilson relation, the gauge field dependence of the fermion measure is determined through the so-called measure term. We derive a closed formula of the measure term on the finite volume lattice. The Wilson line degrees of freedom (torons) of the link field are treated separately to take care of the global integrability. The local counter term is explicitly constructed with the local current associated with the cohomologically trivial part of the gauge anomaly in a finite volume. The resulted formula is very close to the known expression of the measure term in the infinite volume with a single parameter integration, and would be useful in practical implementations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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