Investigation of Weak Nucleon Currents in Light Nuclei studied rom Nuclear Weak Processes

(1)在氘和A = 12体系的弱过程（包括中微子反应）中研究了弱核子电流。(2)介子氘在两个超精细态下的介子捕获率之比对诱导赝标量项敏感，而对交换电流效应中的参数不敏感。(3)大阪组提供了1992- 1993年在12B和12N的β射线角分布资料。利用这些数据和我们的公式，我们找到了感应张量电流的一个非常精确的新极限和轴向电荷的一个新值。(5)利用介子捕获和上述轴向电荷的形式化，我们得到了新的诱导伪标量耦合常数，这有力地支持了PCAC假设。(6)由于结果，Morita， M.参加了五次国际会议，并发表了邀请演讲。还发表了一些论文。

(1) Weak nucleon currents have been studied in weak processes of the deuterium and A = 12 system including neutrino reactions.(2) The ratio of the muon capture rate in two hyperfine states of the muonic deuterium is sensitive to the induced pseudoscalar term, while it is insensitive to the parameters in the exchange current effects.(3) The Osaka group provided us their 1992-3 data on the beta-ray angular distribution in 12B and 12N.Using these data with our formalism, we found a very precise new limit on the induced tensor current and a new value for the axial charge.(5) Using formalism on the muon capture and the above axial charge, we a new value of the induced pseudoscalar coupling constant, which support the PCAC hypothesis strongly.(6) Because of results, Morita, M., participated five international meetings to deliver invited talks. A numbers of papers were also published.