Measurement of the Proton Asymmetry C in Neutron Beta Decay

Within the Standard Model of particle physics only two parameters, the first element of the Cabibbo-Kobayashi-Maskawa matrix Vud and the ratio of coupling constants lambda are...在粒子物理标准模型（Standard Model）中，仅包含两个参数：卡比博-小林-益川矩阵（Cabibbo-Kobayashi-Maskawa）的第一元素V_ud，以及耦合常数之比λ（lambda）……