88 citations · 1.1k across the 91 of their papers we have counts for
13 papers · 1 filter
Modular weights of wave functions on magnetized torus
Tim Jeric, Tatsuo Kobayashi, Hajime Otsuka +2
We study the origin of modular weights of wave functions in magnetized models. It is explicitly demonstrated that the modular weights of the wave functions on magnetized $T…
Generalized CP from non-invertible selection rules
Tatsuo Kobayashi, Hajime Otsuka
We study a framework in which fields are labeled by basis elements of a fusion algebra with non-invertible fusion rules. In particular, we consider the case where fields are labele…
GUT-motivated non-invertible symmetry as a solution to the strong CP problem and the neutrino CP-violating phase
Tatsuo Kobayashi, Hajime Otsuka, Morimitsu Tanimoto +1
The unsuppressed CP violation in QCD is a problem in the standard model. If we have some mechanism to guarantee real determinants of the quark mass matrices, the vanishing physical…
Non-Invertible Selection Rules on Heterotic Non-Abelian Orbifolds
Tatsuo Kobayashi, Ryusei Nishida, Hajime Otsuka
We investigate coupling selection rules in heterotic string theory on non-Abelian orbifolds. Since boundary conditions on the orbifolds are classified by conjugacy classes of space…
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…
Non-invertible Symmetry as a Solution to the Strong CP Problem in a GUT-inspired Standard Model
Tatsuo Kobayashi, Hajime Otsuka, Tsutomu T. Yanagida
We propose a three-zero texture for the down-quark mass matrix within a GUT-inspired Standard Model, enforced by a non-invertible selection rule originating from $\mathbb{Z…
On discrete gauging and non-invertible selection rules
Jun Dong, Tim Jeric, Tatsuo Kobayashi +2
We clarify selection rules of conjugacy classes of several finite discrete groups where we deal with both gauged and ungauged cases. We find that the selection rules enjoy finite A…
Matter symmetries in supersymmetric standard models from non-invertible selection rules
Tatsuo Kobayashi, Hironobu Mita, Hajime Otsuka +1
We discuss phenomenological implications of non-invertible selection rules in the framework of the supersymmetric standard model. We find that a remnant symmetry of…
Radiative neutrino mass models from non-invertible selection rules
Tatsuo Kobayashi, Hiroshi Okada, Hajime Otsuka
We apply non-invertible selection rules coming from a fusion algebra to radiative neutrino mass models where fields are labeled by the elements in the algebra. Since non-invertible…
Lepton mass textures from non-invertible multiplication rules
Tatsuo Kobayashi, Hajime Otsuka, Morimitsu Tanimoto +1
We study the lepton mass textures, which are derived by gauging of symmetries. We can obtain various textures for the Yukawa couplings in the charged…
Classification of Modular Symmetries in Non-Supersymmetric Heterotic String theories
Shuta Funakoshi, Yuichi Koga, Hajime Otsuka
We study modular symmetries in non-supersymmetric heterotic string theories on toroidal backgrounds with Wilson line modulus, constructed by stringy Scherk-Schwartz compactificatio…
More about quark Yukawa textures from selection rules without group actions
Tatsuo Kobayashi, Yume Nishioka, Hajime Otsuka +1
We study the coupling selection rules associated with non-group symmetries, i.e., gauging of symmetries. We clarify which Yukawa textures can be deriv…
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…