Speaker
Hajime Otsuka
(Kyushu University)
Description
We discuss a common origin of four-dimensional flavor and CP symmetries in the context of heterotic string theory with standard embedding. We find that the flavor symmetries of fundamental and anti-fundamental representations of $E_6$ gauge group are governed by geometric symmetries of Calabi-Yau threefolds, i.e., the symplectic modular symmetry. Furthermore, the CP symmetry is identified with an outer automorphism of the symplectic modular group of Calabi-Yau threefolds.
Primary author
Hajime Otsuka
(Kyushu University)
Co-authors
Tatsuo Kobayashi
(Hokkaido University)
Keiya Ishiguro
(KEK)
