论文标题
Electron和Muon $ g-2 $，辐射中微子质量和$ \ ell'\ to \ellγ$在$ u（1）_ {e-μ} $模型中
Electron and muon $g-2$, radiative neutrino mass, and $\ell' \to \ell γ$ in a $U(1)_{e-μ}$ model
论文作者
论文摘要
提出了一种非惯例$ u（1）_ {e-μ} $量规模型，以解释电子和muon（Lepton $ g-2 $）的意外异常的磁矩（Lepton $ g-2 $），其中只有标准模型中的右手电子和MUON携带$ u（1）_ {e-μ} $。尽管当仪表对称性自发断裂时，轻便量被抑制，但可以通过Yukawa耦合产生它们到新引入的颗粒，例如矢量样的Lepton Doublet和Singlet，以及标量式单曲。发现相同的Yukawa耦合以及与希格斯的新标量联耦合结合在一起，可以诱导辐射的Lepton-Fravor违规过程$ \ ell'\ to \ ellγ$和Lepton $ G-2 $，Lepton $ G-2 $与$ g-2 $相比$ _ m _ _ _ \ el el \ el el et \ ell} $。当Majorana fermions和标量单元进一步添加到模型中时，活动中微子可以通过辐射Seesaw机制获得质量。当$ m_e $和$m_μ$和中微子数据得到满足时，我们发现电子$ g-2 $可以达到$ -10^{ - 12} $的订单，而muon $ g-2 $可以是$ 10^{ - 9} $的订单。此外，当$μ\ toeγ$衰减被抑制时，$τ\ toeγ$的生成分支比率可以为$ O（10^{ - 8}）$，而对于$τ\ toμγ$，则可以与当前上限一样大。
A nonconventional $U(1)_{e-μ}$ gauge model is proposed to explain the unexpected anomalous magnetic moments of the electron and muon (lepton $g-2$), where only the right-handed electron and muon in the standard model carry the $U(1)_{e-μ}$ charge. Although the light lepton masses are suppressed when the gauge symmetry is spontaneously broken, they can be generated through the Yukawa couplings to newly introduced particles, such as vector-like lepton doublets and singlet, and scalar singlets. It is found that the same Yukawa couplings combined with the new scalar couplings to the Higgs can induce the radiative lepton-flavor violation processes $\ell' \to \ell γ$ and lepton $g-2$, where the lepton $g-2$ is proportional to $m_{\ell}$. When Majorana fermions and a scalar singlet are further added into the model, the active neutrinos can obtain masses via the radiative seesaw mechanism. When the bounds from the $m_e$ and $m_μ$ and the neutrino data are satisfied, we find that the electron $g-2$ can reach an order of $-10^{-12}$, and the muon $g-2$ can be an order of $10^{-9}$. In addition, when the $μ\to e γ$ decay is suppressed, the resulting branching ratio for $τ\to e γ$ can be of $O(10^{-8})$, and that for $τ\to μγ$ can be as large as the current upper limit.
