论文标题
在辐射Seesaw模型中，Lepton风味违反分支比率的下限
Lower bounds on lepton flavor violating branching ratios in a radiative seesaw model
论文作者
论文摘要
我们研究了违反的Lepton风味，例如$μ\至Eγ$，$τ\ toEγ$，$τ\ toμγ$在Krauss，Nasri和Trodden提出的三环辐射Seesaw模型中。在此模型中，对于内部中微子质量的适当幅度而言，相关的耦合常数对于较重的标量较大。施加了一个标准，即所有耦合常数必须足够小才能受到扰动的处理，因此我们发现了一个标量的质量上的上限。通过将其与中微子质量参数相结合，我们在违反Lepton风味过程的分支比率上得出了下限。在具有倒数质量排序和最佳拟合中微子振荡参数的情况下，下限之一是$ \ text {br}（μ\ toeγ）> 1.1 \ times 10^{ - 13} $，它在MEG〜II实验的范围内。
We study the lepton flavor violating decays such as $μ\to eγ$, $τ\to eγ$, $τ\to μγ$ in the three-loop radiative seesaw model proposed by Krauss, Nasri, and Trodden. In this model, the relevant coupling constants are larger for the heavier scalars that run inside loop diagrams to generate the appropriate magnitude of neutrino masses. Imposing a criterion that all the coupling constants must be small enough to be treated perturbatively, we find an upper bound on the mass of one of the scalars. By combining it with neutrino mass parameters, we derive lower bounds on the branching ratios of the lepton flavor violating processes. In a case with the inverted mass ordering and best-fit neutrino oscillation parameters, one of the lower bounds is $\text{Br}(μ\to eγ)>1.1\times 10^{-13}$, which is within the reach of the MEG~II experiment.
