88 citations · 88 across the 2 of their papers we have counts for
6 papers
Stringy Constraints on Modular Flavor Models
Keiya Ishiguro, Takafumi Kai, Tatsuo Kobayashi +1
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 cruc…
Classification of Modular Symmetries in Type IIB Flux Landscape
Keiya Ishiguro, Takafumi Kai, Tatsuo Kobayashi +2
In this work, we study modular symmetries in type IIB flux landscape by investigating symplectic basis transformations of period vectors on toroidal orbifolds. To fix explicit cycl…
Flux Landscape with Enhanced Symmetry Not on Elliptic Points
Keiya Ishiguro, Takafumi Kai, Tatsuo Kobayashi +1
We study structures of solutions for SUSY Minkowski F-term equations on two toroidal orientifolds with . Following our previous study \cite{Ishiguro:2020tmo}, with fi…
Hierarchical structure of physical Yukawa couplings from matter field Kähler metric
Keiya Ishiguro, Tatsuo Kobayashi, Hajime Otsuka
We study the impacts of matter field Kähler metric on physical Yukawa couplings in string compactifications. Since the Kähler metric is non-trivial in general, the kinetic mixing o…
Landscape of Modular Symmetric Flavor Models
Keiya Ishiguro, Tatsuo Kobayashi, Hajime Otsuka
We study the moduli stabilization from the viewpoint of modular flavor symmetries. We systematically analyze stabilized moduli values in possible configurations of flux compactific…
Spontaneous CP violation and symplectic modular symmetry in Calabi-Yau compactifications
Keiya Ishiguro, Tatsuo Kobayashi, Hajime Otsuka
We explore the geometrical origin of CP and the spontaneous CP violation in Calabi-Yau compactifications. We find that the CP symmetry is identified with an outer automorphism of t…