发表机构
IJCLab, CNRS/IN2P3 et Université Paris-Saclay; University of Ljubljana; Jožef Stefan Institute(巴黎萨克雷大学; 卢布尔雅那大学; 约瑟夫·斯蒂芬研究所)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本文提出通过半轻子衰变的前后不对称性来探测中微子质量,该可观测量对无质量中微子为零,对重中微子或右手相互作用则非零,并以赝标量介子衰变为例验证。
AI 中文摘要
我们认为,对半轻子衰变的详细分析可以检验大质量中微子存在的可能性。与前后不对称性相关的关键可观测量,对于无质量中微子恰好为零,但如果中性轻子较重,并通过左手算符与标准模型场相互作用,则该可观测量变为非零。对于右手相互作用,即使对于无质量的右手性中微子,该量也显著偏离零。我们以赝标量介子衰变为另一个赝标量介子的例子明确展示了这一点。
英文摘要
We argue that a detailed analysis of semileptonic decays can test the possibility of a massive neutrino. The key observable, related to the forward-backward asymmetry, is exactly zero for a massless neutrino but becomes non-zero if the neutral lepton is heavy and interacts with Standard Model fields via left-handed operators. For right-handed interactions, this quantity differs significantly from zero even for a massless right-handed neutrino. We demonstrate this explicitly using the example of a pseudoscalar meson decaying into another pseudoscalar meson.
CommentsContribution to the 2026 Electroweak session of the 60th Rencontres de Moriond