论文标题
重新访问弱辐射衰减
Revisiting Weak Radiative Decays of Hyperons
论文作者
论文摘要
通过实验驱动的对超子特性的重新兴趣触发，我们解决了弱辐射超子衰减（WRHD）的主题。我们从Hara定理问题开始，并简要讨论其可能逃避的问题。然后，我们简要回顾了vector-meson-domminance（VMD）方法的故事。我们强调了从Hara的理论竞争到随着时间的推移发生的VMD方法的Hara-teorem-sats forsing版本的转变。最后，在最近的一篇理论论文的刺激下，我们讨论了WRHD的杆模型描述，特别注意了中级$λ（1405）$ state的贡献问题。我们指出，$λ\ tonγ$衰减不对称的测量可以解决遇到的歧义，并肯定回答了Hara定理是否违反的问题。
Triggered by experimentally driven renewed interest in hyperon properties we address the subject of weak radiative hyperon decays (WRHD). We start with the issue of Hara's theorem and briefly discuss the question of its possible evasion. Then, we give a short review of the story of vector-meson-dominance (VMD) approach to WRHD. We stress the shift from the Hara's-theorem-violating to Hara's-theorem-satisfying version of the VMD approach that did occur over time. Finally, spurred by a recent theoretical paper, we discuss the pole model description of WRHD, putting special attention to the issue of the contributions from the intermediate $Λ(1405)$ state. We point out that the measurement of the $Λ\to n γ$ decay asymmetry could resolve the encountered ambiguities and definitely answer the question of whether Hara's theorem is violated or not.
