发表机构
Van Lang University; Can Tho University（万浪大学; 芹苴大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究在含单态和三重态轻夸克的扩展标准模型中，探讨带电轻子反常磁矩与味破坏衰变，发现模型无法同时解释电子和缪子反常磁矩，并给出各衰变分支比的上限预测。
AI 中文摘要
我们在包含一个$SU(2)_L$单态和一个$SU(2)_L$三重态标量轻夸克的标准模型扩展中，研究了带电轻子的反常磁矩及其轻子味破坏衰变。我们的结果揭示了$\Delta a_{e,\mu}$与$e_b\to e_a\gamma$以及$h,Z\to e_b^\pm e_a^\mp$衰变率之间的显著关联。特别是，分支比$\mathrm{Br}(e_b\to e_a\gamma)$和$\mathrm{Br}(h,Z\to e_b e_a)$表现出显著的相关性。该模型无法同时容纳$|\Delta a_e|=\mathcal{O}(10^{-13})$和$|\Delta a_\mu|=\mathcal{O}(10^{-10})$的较大值。对于$|\Delta a_\mu|=\mathcal{O}(10^{-10})$且Br$(\mu \to e\gamma)>10^{-15}$的情况，衰变率被抑制为Br$(\tau \to e\gamma)<\mathcal{O}(10^{-12})$和Br$(h\to \tau e)<\mathcal{O}(10^{-6})$，而其余衰变率可达到即将进行的实验灵敏度。相反，对于$|\Delta a_e|=\mathcal{O}(10^{-13})$，可获得被抑制的衰变率Br$(\tau \to \mu \gamma)<\mathcal{O}(10^{-11})$和Br$(h\to \tau \mu)<\mathcal{O}(10^{-7})$。
英文摘要
We study the anomalous magnetic moments of charged leptons and their lepton flavor-violating decays in a Standard Model extension containing one $SU(2)_L$singlet and one $SU(2)_L$ triplet scalar leptoquark. Our results reveal significant correlations among $Δa_{e,μ}$ and the decay rates of $e_b\to e_aγ$, and $h,Z\to e_b e_a$. In particular, the branching ratios $\mathrm{Br}(e_b\to e_aγ)$ and $\mathrm{Br}(h,Z\to e_b e_a)$ exhibit significant correlations. The model cannot simultaneously accommodate sizable values of $|Δa_e|=\mathcal{O}(10^{-13})$ and $|Δa_μ|=\mathcal{O}(10^{-10})$. For $|Δa_μ|=\mathcal{O}(10^{-10})$ and $\mathrm{Br}(μ\to eγ)>10^{-15}$, the decay rates are suppressed to $\mathrm{Br}(τ\to eγ)<\mathcal{O}(10^{-12})$ and $\mathrm{Br}(h\to τe)<\mathcal{O}(10^{-6})$, while the remaining ones can reach the forthcoming experimental sensitivities. Conversely, for $|Δa_e|=\mathcal{O}(10^{-13})$, one obtains the suppressed decay rates $\mathrm{Br}(τ\to μγ)<\mathcal{O}(10^{-11})$ and $\mathrm{Br}(h\to τμ)<\mathcal{O}(10^{-7})$.
Comments27 pages, 9 figures
