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物理学报. 1960, 16(2): 70-75.
doi: 10.7498/aps.16.70.
关于μ俘获中有效赝标量耦合项的符号
- 收稿日期: 1959-11-30
- 刊出日期: 1960-01-05
摘要: 最近的实验有迹象表明,μ俘获中有效赝标量项的符号与从V-A理论用色散关系求得的相反。本文对这个符号的差别提出了一个可能的解释。在本文中指出,汉密顿量中一很小的赝标耦合项(约为有效赝标耦合项的1/100)即能改变有效赝标耦合项的符号。将这一赝标项加以变换,使之成为普适赝矢量电流的一部分,则可证明新添的这一项对β衰变和π→e+v衰变不产生任何可观察的效应,因而不破坏V-A理论的普适性。文章最后讨论了超子对对有效赝标项符号的影响的问题。
English Abstract
ON THE SIGN OF THE EFFECTIVE PSEUDOSCALAR TERM IN μ CAPTURE REACTIONS
- Received Date:
30 November 1959
- Published Online:
05 January 1960
Abstract: Recent experiments seem to show that the sign of the effective pseudoscakr term in μ-caplure reactions is different from the theoretical resuk of Goldberger and Treiman based on V-A theory and dispersion relation technique. A possible explanation of this difference is proposed in the present note. It is shown that a very small p. s. tern in the HamiHonian (of the order 1/100 of the effective p. s. term) can change the sign of the effective p. s. term. If this small term is transformed and added as a part of the universal axial vector current, it will produce practically no effect in β-decay and π→ μ+ v decay. Finally the inclusion of hyperon pairs is considered.
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