论文标题
部分可观测时空混沌系统的无模型预测
Improved limits on lepton-flavor-violating decays of light pseudoscalars via spin-dependent $μ\to e$ conversion in nuclei
论文作者
论文摘要
轻型培养基的光伪级衰变，$ p =π^0，η，η\toμE$在标准模型中被严格抑制，直到中微子振荡的微小贡献，因此它们的观察力将是标准模型以外的物理学的明确指示。然而，在有效的田间理论中，这种衰变通过轴向矢量，伪尺度或gluonic算子进行，与此同时，它们以旋转依赖性$μ\ to e $转换为nuclei中。我们得出了主公式，该公式以模型无关的方式将两个过程以威尔逊系数连接起来，并研究当前$μ\ to titanium titanium to $ p \ to $ p \toμe$衰减的含义。我们发现，这些间接限制超过了直接数量级。
Lepton-flavor-violating decays of light pseudoscalars, $P=π^0,η,η'\toμe$, are stringently suppressed in the Standard Model up to tiny contributions from neutrino oscillations, so that their observation would be a clear indication for physics beyond the Standard Model. However, in effective field theory such decays proceed via axial-vector, pseudoscalar, or gluonic operators, which are, at the same time, probed in spin-dependent $μ\to e$ conversion in nuclei. We derive master formulae that connect both processes in a model-independent way in terms of Wilson coefficients, and study the implications of current $μ\to e$ limits in titanium for the $P\toμe$ decays. We find that these indirect limits surpass direct ones by many orders of magnitude.
