论文标题
对标准模型内外的Beta衰减的全面分析
Comprehensive analysis of beta decays within and beyond the Standard Model
论文作者
论文摘要
在标准模型中审查和分析了允许的核β衰变和中子衰减中的精确测量值，并寻找新的物理学。该分析结合了最新的实验和理论发展。结果是用威尔逊系数来解释的，该系数描述了负责β衰减的瘦小和核子（或夸克）之间的有效相互作用。进行新的全球拟合，并结合了中子衰减中的精确度量的全面列表，超允许的$ 0^+\ rightarrow 0^+$过渡，其他核衰减包括首次来自Mirror Beta Transitions的数据。结果证实了交互的$ v $ - $ a $字符，并将$ v_ {ud} $的更新值和$ g_a $换成$ 10^{ - 4} $级别。我们还对涉及左撇子和右手中微子的外来耦合施加了新的严格限制，这从分析中的镜像衰变中受益匪浅。
Precision measurements in allowed nuclear beta decays and neutron decay are reviewed and analyzed both within the Standard Model and looking for new physics. The analysis incorporates the most recent experimental and theoretical developments. The results are interpreted in terms of Wilson coefficients describing the effective interactions between leptons and nucleons (or quarks) that are responsible for beta decay. New global fits are performed incorporating a comprehensive list of precision measurements in neutron decay, superallowed $0^+\rightarrow 0^+$ transitions, and other nuclear decays that include, for the first time, data from mirror beta transitions. The results confirm the $V$-$A$ character of the interaction and translate into updated values for $V_{ud}$ and $g_A$ at the $10^{-4}$ level. We also place new stringent limits on exotic couplings involving left-handed and right-handed neutrinos, which benefit significantly from the inclusion of mirror decays in the analysis.
