论文标题
在非偏见夸克模型中，对中子β衰减的电荷对称破坏作用
Charge Symmetry Breaking Effects on Neutron Beta Decay in Non-Relativistic Quark Models
论文作者
论文摘要
讨论了电荷对称性破坏（CSB）效应的形式主义，并用于分析电荷对称性破坏对中子β衰变的影响。包括CSB的效果将Beta衰减矩阵元素减少了$ 10^{ - 4} $的订单，这一值比以前的估计值大得多。由于质子后坐力引起的贡献要小得多，发现该贡献的订单为$ 10^{-6} $。 $ v_ {ud} $的值的当前不确定性也为$ 10^{ - 4} $。通过数量级对这种不确定性的改善将要求将电荷对称性破坏效应包括在以后的分析中。
A formalism for the study of charge symmetry breaking (CSB) effects is discussed and used to analyze the effects of charge symmetry breaking on neutron beta decay. The effect of including CSB reduces the beta decay matrix element by an amount on the order of $10^{-4}$, a value much larger than the previous estimate. A much smaller contribution due to proton recoil is treated as well, which is found to be on the order of $10^{-6}$. The current uncertainty in the value of $V_{ud}$ is also of order $10^{-4}$. An improvement of that uncertainty by an order of magnitude would require that charge symmetry breaking effects should be included in future analyses.
