Hajime Otsuka

Stringy Constraints on Modular Flavor Models

Abstract We investigate stringy constraints on moduli spaces in modular flavor models by analyzing moduli-dependent threshold corrections in heterotic string vacua. While moduli play a crucial role in determining the flavor structure of fermions predicted by modular flavor models...

The minimal supersymmetric standard model with non-invertible selection rules

Abstract We investigate a framework of the minimal supersymmetric standard model (MSSM) in which the quark and lepton flavor structure and suppression of flavor-changing neutral currents (FCNCs) are governed by non-invertible selection rules. By implementing such non-group-like f...