论文标题
Lepton违反风味和Scotogenic Majorata中微子质量在Stueckelberg $ u（1）_x $型号
Lepton flavor violation and scotogenic Majorana neutrino mass in a Stueckelberg $U(1)_X$ model
论文作者
论文摘要
我们在标准模型的测量$ u（1）_x $扩展中构建了一个术语主要中微子质量模型，其中可以通过Stueckelberg机制来实现稳定的暗物质（DM）的量规boson和未破解的量规对称性。发现扩展模型的最简单版本由两个惰性 - 吉格斯双重组和一个类似矢量的单元式费米恩组成。除了主要中微子质量外，我们还研究了Lepton侵犯（LFV）的过程，例如$ \ ell_i \ to \ell_jγ$，$ \ ell_i \ to 3 \ ell_j $，$μ-e $ $ usleus的转换率，以及muonium-antimuonium-antimuonium uscillation。我们表明，在MU3E和MU3E和MU2E实验中设计的$μ\至3e $和$μ-E $转换率的灵敏度使这两个衰减都是$μ\至E $ LFV工艺上最严重的约束。发现$τ\至μγ$，$τ\至3μ$可以达到Belle II的显着性水平。除了解释DM遗物密度外，我们还表明，DM核子散射横截面可以满足当前DM直接检测的实验极限。
We construct a scotogenic Majorana neutrino mass model in a gauged $U(1)_X$ extension of the standard model, where the mass of the gauge boson and the unbroken gauge symmetry, which leads to a stable dark matter (DM), can be achieved through the Stueckelberg mechanism. It is found that the simplest version of the extended model consists of the two inert-Higgs doublets and one vector-like singlet fermion. In addition to the Majorana neutrino mass, we study the lepton flavor violation (LFV) processes, such as $\ell_i \to \ell_j γ$, $\ell_i \to 3 \ell_j$, $μ-e$ conversion rate in nucleus, and muonium-antimuonium oscillation. We show that the sensitivities of $μ\to 3e$ and $μ-e$ conversion rate designed in Mu3e and COMET/Mu2e experiments make both decays the most severe constraints on the $μ\to e$ LFV processes. It is found that $τ\to μγ$ and $τ\to 3μ$ can reach the designed significance level of Belle II. In addition to explaining the DM relic density, we also show that the DM-nucleon scattering cross section can satisfy the currently experimental limit of DM direct detection.
