论文标题
可行的$ l_e-l_μ$与$μ\ to e $违规的型号
A viable $L_e-L_μ$ model with $μ\to e$ violation
论文作者
论文摘要
我们将标准型号量规组扩展到$ u（1）_ {l_e-l_μ} $，并引入了两个标量，一个Doublet和一个单元，这些标量在此新组下被充电，并且具有Lepton风味违反耦合。由于在此模型中，$μ\ to e $过程只能由$μ\ toτ\ timesτ\ to e $交互介导，因此可以避免从$μ\到e $过渡的边界，同时允许可访问的新物理。我们考虑$ z'u $ boson的情况，质量为$ m_ {z'} \ simeq10〜 $ gev和量规耦合$ g'\ simeq 10^{ - 4} $，它可以触及Belle-ii，而Live live lived $ z'ub boson，以及$ z'u $ z'$ \ sime z'米。可以通过搜索$ \ ell \ to \ ell'+\ text {Inv。} $来探测的m_μ-m_e $。如果将无菌中微子添加到光谱中，也可以考虑中微子质量和混合角度。
We extend the Standard Model gauge group by $U(1)_{L_e-L_μ}$ and introduce two scalars, a doublet and a singlet, that are charged under this new group and have lepton flavour violating couplings. Since in this model $μ\to e$ processes can only be mediated by $μ\to τ\times τ\to e$ interactions, bounds from $μ\to e$ transitions can be avoided while allowing for accessible new physics. We consider the case of a $Z'$ boson with a mass of $M_{Z'}\simeq10~$GeV and a gauge coupling $g'\simeq 10^{-4}$, which is in reach of Belle-II, and a long-lived $Z'$ boson with a mass of $\text{MeV}\lesssim M_{Z'}\lesssim m_μ-m_e$ which can be probed by searching for $\ell\to \ell'+\text{inv.}$. Neutrino masses and mixing angles can also be accounted for if sterile neutrinos are added to the spectrum.
