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

弱核过程中轻核中弱核子电流的研究

• 批准号: 04640310
• 负责人: MORITA Masato
• 金额: $ 1.28万
• 依托单位: Josai International University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04640310/
• 关键词: Beta Decay; Muon Capture; Induced Pseudoscalar; Weak Current; Weak Interaction; Induced Tensor; Axial Charge; Neutrino Reaction; アクシアル・チャージ

(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.

(1)本文研究了氘和A = 12系统中包括中微子反应在内的弱过程中的弱核子流。(2)μ介子氘的两个超精细态的μ介子俘获率之比对诱导赝标项敏感，而对交换电流效应中的参数不敏感。(3)Osaka小组提供了1992- 1993年关于12 B和12 N β射线角分布的数据，利用这些数据和我们的形式，我们找到了一个非常精确的新的感生张量流极限和轴向电荷的新值。(5)利用μ子俘获和上述轴向电荷的形式，我们得到了一个新的诱导赝标耦合常数的值，它有力地支持了PCAC假设。(6)由于结果，Morita，M.，参加了五次国际会议，应邀发表演讲。还发表了一些论文。

项目成果

K.Watanabe,T.Oda,T.Niwa,H.Ohtsubo,R.Morita and M.Morita: "Asymmotry and Energy Spectrum of Electrons in Bound Muon Decay" Atomic Data and Nuclear Data Tables. 54. 165-178 (1993)

K.Watanabe、T.Oda、T.Niwa、H.Ohtsubo、R.Morita 和 M.Morita：“束缚 μ 子衰变中电子的不对称性和能谱”原子数据和核数据表。

M.Morita, R.Morita and K.Koshigiri: "Induced Pseudoscalar Terms in Weak Nucleon Current" Proceedings of PANIC93, Warld Scientific. 1-3 (in press).

M.Morita、R.Morita 和 K.Koshigiri：“弱核子电流中的诱导伪标量项”PANIC93 论文集，Warld Scientific。

M.Morita,R.Morita,et al.: "Induced Pseudoscalar Interaction in Weak Nucleon Current and Muon Capture in Hyperfine States of Muonic Deuterium." Hyperfine Interactions. 1-9 (1993)

M.Morita、R.Morita 等人：“弱核子电流中的诱导赝标量相互作用和 μ 子氘超精细态中的 μ 子捕获。”

M.Morita: "Weak Nucleon Currents in Light Nuclei" Few-Body System. Suppl.5. 165-174 (1992)

M.Morita：“轻核中的弱核子电流”少体系统。

K.Watanabe,T.Oda,T.Niwa,H.Ohtsubo,R.Morita and M.Morita: "Asymmetry and Energy Spectrum of Electrons in Bound Muon Decay" Atomic Data and Nuclear Data Tables. 54. 165-178 (1993)

K.Watanabe、T.Oda、T.Niwa、H.Ohtsubo、R.Morita 和 M.Morita：“束缚 μ 子衰变中电子的不对称性和能谱”原子数据和核数据表。