通用单圈有效Action中的混合重光匹配
Mixed Heavy-Light Matching in the Universal One-Loop Effective Action
摘要：
最近，以通用单圈有效作用量的形式得到了一个计算单圈路径积分的一般结果。它可以用来导出有效场论算子的维度高达六，通过评估的痕迹矩阵在这个表达式中，与质量的依赖封装在通用系数。在这里，我们表明，它可以考虑在匹配过程中的混合重轻粒子的环路。我们的处方计算这些混合贡献的威尔逊系数是概念上简单。此外，它具有保持有效作用的通用结构的优点，我们说明使用的例子，整合出一个重的电弱三重标量耦合到一个轻的希格斯偶极子。最后，我们还确定了新的结构，以前被忽视的普遍结果。
英文摘要：
Recently, a general result for evaluating the path integral at one loop was obtained in the form of the Universal One-Loop Effective Action. It may be used to derive effective field theory operators of dimensions up to six, by evaluating the traces of matrices in this expression, with the mass-dependence encapsulated in the universal coefficients. Here we show that it can account for loops of mixed heavy-light particles in the matching procedure. Our prescription for computing these mixed contributions to the Wilson coefficients is conceptually simple. Moreover it has the advantage of maintaining the universal structure of the effective action, which we illustrate using the example of integrating out a heavy electroweak triplet scalar coupling to a light Higgs doublet. Finally we also identify new structures that were previously neglected in the universal results.
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