35 citations · 45 across the 9 of their papers we have counts for
9 papers
Induced moduli oscillation by radiation and space expansion in a higher-dimensional model
Hajime Otsuka, Yutaka Sakamura
We investigate the cosmological expansion of the 3D space in a 6D model compactified on a sphere, beyond the 4D effective theory analysis. We focus on a case that the initial tempe…
Modular forms and hierarchical Yukawa couplings in heterotic Calabi-Yau compactifications
Keiya Ishiguro, Tatsuo Kobayashi, Satsuki Nishimura +1
We study the modular symmetry in heterotic string theory on Calabi-Yau threefolds. In particular, we examine whether moduli-dependent holomorphic Yukawa couplings are described by…
Novel moduli space in modular flavor models : a case study for modular seesaw model with hidden gauge symmetry
Keiya Ishiguro, Takaaki Nomura, Hiroshi Okada +2
We study flavor phenomenologies in a basis of a double covering of modular group with a hidden symmetry, in which we work on regions at nearby two fixed points and th…
Modular flavor models with positive modular weights: a new lepton model building
Tatsuo Kobayashi, Takaaki Nomura, Hiroshi Okada +1
We propose an interesting assignment of positive modular wights for fields in a modular non-Abelian discrete flavor symmetry. By this assignment, we can construct inverse seesaw an…
Texture zeros realization in a three-loop radiative neutrino mass model from modular symmetry
Takaaki Nomura, Hiroshi Okada, Hajime Otsuka
We derive verifiable two-zero textures in the framework of a three-loop induced neutrino mass model applying a modular symmetry for the lepton sector. Interestingly, the neut…
Sequestered String Models imply Split Supersymmetry
Michele Cicoli, Alessandro Cotellucci, Hajime Otsuka
Sequestering is a promising mechanism in 4D string models to reconcile high-scale inflation with low-energy supersymmetry. In this scenario the MSSM lives on branes at singularitie…