Speaker
Description
Group-like symmetries and selection rules have been studied in particle physics. However, string compactifications can lead to not only group-like symmetries, but also "symmetries" without group actions, i.e., non-invertible selection rules. Recently, we have derived several non-invertible selection rules from string theory and applied them to particle physics. See e.g. arXiv:2408.13984, 2409.05270, 2503.09966, 2508.12287. For example, using our selection rules, we can derive interesting Yukawa textures, which cannot be derived simply by group-like symmetries. Our approach is quite novel and would be useful in particle physics, in particular flavor physics. In this talk, I will explain some stringy origins of non-invertible selection rules and also some applications to particle physics.