The Flavor Puzzle: Textures and Symmetries
To cite this article, please refer to its earlier version published in the International Journal of Modern Physics A, Volume 39, 2441003 (2024), DOI: 10.1142/S0217751X24410033.
Talk given by HPN at the “Symposium in honor of Harald Fritzsch and his lasting contributions to Theoretical Physics”, July 14, 2023, LMU Munich, Germany.
We discuss aspects of a promising top-down origin of flavor symmetries in particle physics. Modular transformations originating from string theory dualities are shown to play a crucial role. We introduce the notion of an “eclectic” flavor scheme that unifies traditional flavor symmetries, modular symmetries and 𝒞𝒫-transformations. It exhibits the phenomenon of “Local Flavor Unification” with enhanced flavor symmetries at fixed points or lines in moduli space. Successful fits of masses and mixing angles of quarks and leptons are found in the vicinity of these points and lines.
