论文标题
激发的Lepton三胞胎对Electroweak可观测值的贡献在一个循环级别
Excited lepton triplet contribution to electroweak observables at one loop level
论文作者
论文摘要
在本文中，我们向Electroweak Precision可观察到的$Δρ$介绍了来自$ i_w = 1 $多重兴奋的益激子的一环辐射校正。我们已经使用有效的拉格朗日方法计算出异国情调的Lepton三胞胎与矢量玻色子和普通瘦素的耦合。然后，这些耦合用于估计激发的Lepton三重线对$Δρ$参数的贡献。质量退化激发的Lepton对$Δρ$的贡献很小，可以忽略。但是，如果激发的瘦素是非分类的，则与当前的实验搜索和扰动单位性条件相比，它们的贡献可能很大。
In this paper, we present the one-loop radiative corrections to the electroweak precision observable $Δρ$ coming from the $I_W=1$ multiplet excited leptons. We have calculated the couplings of the exotic lepton triplet to the vector bosons and ordinary leptons using effective Lagrangian approach. These couplings are then used to estimate the excited lepton triplet contribution to the $Δρ$ parameter. The mass degenerate excited lepton contribution to $Δρ$ is small and can be neglected. However, if the excited leptons are non-degenerate, their contribution can be large which can result in more stringent constraints on the excited fermion parameter space compared to the constraints from present experimental searches and perturbative unitarity condition.
