Texture zeros for lepton flavor mixing

Abstract

The strong mass hierarchy, flavor mixing pattern and CP violation in the quark sector have been long-standing puzzles in the Standard Model. Thanks to the elegant neutrino oscillation experiments in the past few decades, now we know that neutrinos are massive and lepton flavor mixing is significant. The flavor puzzles have extended to the lepton sector. In this article, we explain how the idea of texture zeros applies to understand lepton flavor mixing, and emphasize that it is particularly useful for exploring the underlying dynamics or symmetries for lepton flavor mixing.