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arXiv 1408.3565hep-ph
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用6维算子的系统有效场论方法研究$μ\to eγ$衰变

The $μ\to eγ$ decay in a systematic effective field theory approach with dimension 6 operators

Giovanni Marco Pruna, Adrian Signer

摘要:

我们实现了一个系统的有效场论的基准过程$μ\to e γ$,执行自动化的单循环计算,包括6维运营商和研究他们的异常尺寸。我们得到的限制威尔逊系数的轻子味违反运营商,有助于分支比$μ\to e γ$在一个循环的相关子集。此外,我们说明了一种方法来提取进一步的约束诱导的混合下重整化群演化的运营商。这导致直接在高尺度下对相应的威尔逊系数的限制。该程序也可以应用于其他过程,作为一个例子,我们也考虑轻子味违反衰变的$τ$。

英文摘要:

We implement a systematic effective field theory approach to the benchmark process $μ\to e γ$, performing automated one-loop computations including dimension 6 operators and studying their anomalous dimensions. We obtain limits on Wilson coefficients of a relevant subset of lepton-flavour violating operators that contribute to the branching ratio $μ\to e γ$ at one-loop. In addition, we illustrate a method to extract further constraints induced by the mixing of operators under renormalisation-group evolution. This results in limits on the corresponding Wilson coefficients directly at the high scale. The procedure can be applied to other processes as well and, as an example, we consider also lepton-flavour violating decays of the $τ$.

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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