论文标题
两循环辐射的seesaw，muon $ g-2 $和$τ$ -Lepton-fravorravorrative and DM约束
Two-loop radiative seesaw, muon $g-2$, and $τ$-lepton-flavor violation with DM constraints
论文作者
论文摘要
当将模型应用于Lepton-Fravor Intravory（LFV）过程时，在MA模型中以两个单位违反Lepton-number违反了Lepton-number的四分之一标量耦合。为了通过量子环效应动态生成$λ_5$参数，并保留暗物质（DM）候选者，我们通过添加$ Z_2 $ -ODD矢量的Lepton Doublet和$ Z_2 $ $ z_2 $ - even-even Majorana Singlet来扩展MA模型。使用新的耦合到Higgs和仪表玻色子，当满足DM核苷散射横截面的上限时，可以解释观察到的DM遗物密度。除了中微子数据和LFV约束外，还发现DM遗物密度可以显着排除自由参数空间。然而，由惰性带电的higgs介导的产生的muon $ g-2 $可以符合实验测量和SM结果之间的$4.2σ$偏差，而当$τ\ \μγ$的分支比率可能与当前的上限一样大，而当稀有$μ\ to（eγ，3 e ec，3 e e）被抑制时。此外，发现所产生的$ br（τ\ toμρ）$可以达到Belle II的灵敏度，其集成的光度为50 $ ab^{ - 1} $。
The quartic scalar coupling $λ_5$ term, which violates the lepton-number by two units in the Ma-model, is phenomenologically small when the model is applied to the lepton-flavor violation (LFV) processes. In order to dynamically generate the $λ_5$ parameter through quantum loop effects and retain the dark matter (DM) candidate, we extend the Ma-model by adding a $Z_2$-odd vector-like lepton doublet and a $Z_2$-even Majorana singlet. With the new couplings to the Higgs and gauge bosons, the observed DM relic density can be explained when the upper limits from the DM-nucleon scattering cross sections are satisfied. In addition to the neutrino data and LFV constraints, it is found that the DM relic density can significantly exclude the free parameter space. Nevertheless, the resulting muon $g-2$ mediated by the inert charged-Higgs can fit the $4.2σ$ deviation between the experimental measurement and the SM result, and the branching ratio for $τ\to μγ$ can be as large as the current upper limit when the rare $μ\to (e γ, 3 e)$ decays are suppressed. In addition, it is found that the resulting $BR(τ\to μρ)$ can reach the sensitivity of Belle II with an integrated luminosity of 50 $ab^{-1}$.
