标题： 弱 sector 中的标准模型中的 currents 及其 couplings 显示英文标题

标题： CURRENTS AND THEIR COUPLINGS IN THE WEAK SECTOR OF THE STANDARD MODEL

摘要： 综述了核中的β衰变和μ捕获实验。 通过超允许费米跃迁确定的矢量耦合常数以及镜像伽莫夫-特勒跃迁中弱磁性项的测量值的恒定性证实了守恒矢量流假设。 中子衰变和质子上的μ捕获分别确定了核子中的轴矢量和赝标量耦合常数。 在有限核中，讨论了这些耦合常数相对于自由核子值被减少的证据。 介子交换电流被证明是对轴向流时空间部分的重要修正，这在一级禁戒β衰变中很明显。 讨论了标准模型的检验以及涉及右手电流和标量相互作用的超出标准模型的扩展。 显示英文摘要

摘要： Beta-decay and muon-capture experiments in nuclei are reviewed. The conserved vector current hypothesis is confirmed through the observed constancy of the vector coupling constant determined from the superallowed Fermi transitions and from the measurement of the weak-magnetism term in mirror Gamow-Teller transitions. The axial-vector and pseudoscalar coupling constants in the nucleon are determined from neutron decay and muon capture on the proton respectively. In finite nuclei, evidence for these coupling constants being reduced relative to their free-nucleon values is discussed. Meson-exchange currents are shown to be an important correction to the time-like part of the axial current as evident in first-forbidden beta decays. Tests of the Standard Model are discussed, as well as extensions beyond it involving right-hand currents and scalar interactions.