Sterile neutrinos in light of the Cabibbo-angle anomaly
Sterile neutrinos in light of the Cabibbo-angle anomaly
复制标题
卡比博角异常中的惰性中微子
DOI：
10.1088/1742-6596/2446/1/012009
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Tobioka Kohsaku
中科院分区：
文献类型：
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作者：
Kitahara Teppei;Tobioka Kohsaku
基于最近的发展，在晶格模拟和计算的辐射校正的充电电流的相互作用，CKM矩阵中的每个组件的不确定性已经复杂。已知第一行CKM么正性在约3σ水平处被违反，这意味着与标准模型预测的3σ水平偏差。这种新的偏差被称为Cabibbo-Angle Anomaly（CAA）。这些CKM组分主要来自K介子、π介子和超允许β衰变。在这篇文章中，我们指出，一个MeV级的不育中微子可以经济地解释CAA。我们一直在研究不育中微子对K介子、π介子、超允许β衰变以及费米耦合常数的贡献。
Based on recent developments in the lattice simulations and calculations of the radiative corrections to the charged-current interactions, the uncertainties for each component in the CKM matrix have been sophisticated. It is known that the first-row CKM unitarity is violated at about 3σ level, implying a 3σ level deviation from the standard model prediction. This new deviation is called Cabibbo-Angle Anomaly (CAA). These CKM components are mainly extracted from kaon, pion, and the superallowed beta decays. In this contribution, we point out that a MeV scale sterile neutrino can economically explain the CAA. We consistently investigate the sterile neutrino contributions to the kaon, pion, superallowed beta decays, and also the Fermi coupling constant.