论文标题
右撇子中微子和CDF II异常
Right-handed neutrinos and the CDF II anomaly
论文作者
论文摘要
我们指出，右撇子中微子可以解决$ W $ -BOSON质量，$ M_W $的最新CDF II测量和标准模型之间的张力。集成新状态会产生单个$ d = 6 $运算符，这会导致PMNS矩阵中的Unitarity偏离。这与$ m_w $的预测相符，从而改变了费米常数从muon衰减中提取，并增加了预测。 PMNS矩阵的非军事也会影响Beta，Meson和Tau衰减。我们发现，可以解释$ M_W $的CDF II值，而不会与Lepton Floes普遍性约束或$ Z $的隐形衰减宽度相冲突。但是，如果右手中微子是$ d = 6 $操作员的起源，那么所谓的Cabibbo角度异常会恶化。如果操作员系数不受限制，情况就会有所改善，这意味着新物理学的其他来源，但是对这两种异常的常见解释都与普遍性范围息息相关。
We point out that right-handed neutrinos can resolve the tension between the latest CDF II measurement of the $W$-boson mass, $M_W$, and the standard model. Integrating out the new states yields a single $d=6$ operator, which induces a deviation from unitarity in the PMNS matrix. This alters the extraction of the Fermi constant from muon decay and increases the prediction for $M_W$, in line with the CDF II result. Non-unitarity of the PMNS matrix would also affect beta, meson, and tau decays. We find that the CDF II value for $M_W$ can be explained without conflicting with lepton flavour universality constraints or the invisible decay width of the $Z$. However, the so-called Cabibbo angle anomaly is worsened if right-handed neutrinos are the origin of the $d=6$ operator. The situation improves if the operator coefficient is left unconstrained, implying additional sources of new physics, but a common explanation of both anomalies is in tension with universality bounds.
