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arXiv 1206.4786hep-lathep-th
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用Wilson费米子确定低能常数的新方法

New Ways to Determine Low-Energy Constants with Wilson Fermions

P. H. Damgaard, U. M. Heller, K. Splittorff

摘要:

我们展示了如何在有限体积下利用固定指数的Wilson Dirac算符的谱信息来分别确定格点规范理论中与Wilson费米子相关的主要物理常数和Wilson低能常数。该方法被证明在模拟与领导阶改进的威尔逊费米子。除了预期的抑制威尔逊手征微扰理论中的主导项,我们观察到大量减少也高阶威尔逊低能常数。

英文摘要:

We show how the leading physical and Wilson low-energy constants associated with Wilson fermions in lattice gauge theory can be determined individually by using spectral information of the Wilson Dirac operator with fixed index at finite volume. The methods are demonstrated in simulations with leading-order improved Wilson fermions. In addition to the expected suppression of the leading term in Wilson chiral perturbation theory we observe a substantial reduction also of the higher-order Wilson low-energy constants.

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