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arXiv 0910.2780hep-lat
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Wilson质量参数在重叠Dirac拓扑荷密度中的作用

Role of the Wilson mass parameter in the overlap Dirac topological charge density

Peter J. Moran, Derek B. Leinweber, J. B. Zhang

摘要:

负威尔逊质量参数是重叠狄拉克算子的输入参数。我们研究的拓扑电荷密度,揭示了重叠的定义,取决于负威尔逊质量的值的程度。观察到一个很强的依赖性,这可以与从胶子定义获得的拓扑电荷密度,与一个变量数量的stout-link涂抹扫描。结果表明,通常与脂肪链接费米子行动,通过涂抹扫描的数量,也存在于重叠形式主义,通过自由的威尔逊质量参数的自由。

英文摘要:

The negative Wilson mass parameter is an input parameter to the overlap Dirac operator. We examine the extent to which the topological charge density, revealed by the overlap definition, depends on the value of the negative Wilson mass. A strong dependence is observed, which can be correlated with the topological charge density obtained from the gluonic definition, with a variable number of stout-link smearing sweeps. The results indicate that the freedom typically associated with fat-link fermion actions, through the number of smearing sweeps, is also present in the overlap formalism, through the freedom in the Wilson mass parameter.

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