学术报告（2024年12月12日14:30）：Dispersive constraints on neutrino mixing（中微子混合的色散约束）

主持人： 张宏浩 教授

报告简介：We derive the relations between the neutrino masses and mixing angles in a dispersive analysis on the mixing of neutral leptonic states. The only involved assumption is that the electroweak symmetry of the Standard Model (SM) is restored at a high energy scale in some new physics scenario, which diminishes the box diagrams responsible for the mixing. We include corrections to the analysis up to three loops, arising from exchanges of additional neutral and charged scalars in the electroweak symmetric phase. The solution to the dispersion relation for the μ−e+-μ+e− mixing generates a typical neutrino mass ∼O(1) eV in the SM unambiguously. The solution also favors the normal ordering of the neutrino masses over the inverted one, and links the large electroweak symmetry restoration, i.e., new physics scale to the small neutrino mass.

报告人简介：李湘楠教授从事微扰量子色动力学和重味夸克物理领域的研究工作，在B介子的非轻子衰变方面，对因子化方法的发展做出了重要贡献。其中单篇论文引用超过500 次的有3篇，成为微扰QCD因子化方法研究B介子非轻子衰变的经典论文。李教授的学术兼职及荣誉包括：2006-2007年任台湾理论科学中心物理组主任，2009-2011年任台湾中研院物理所副所长，2007年获全球华人物理学会亚洲成就奖。