88 citations · 1.1k across the 91 of their papers we have counts for
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Full higher-dimensional analysis of moduli oscillation and radiation in expanding universe
Hajime Otsuka, Yutaka Sakamura
We investigate effects of the radiation and the moduli oscillation around the stabilized values on the evolution of a 6-dimensional spacetime compactified on . In order to see…
Pseudo-Nambu-Goldstone Dark Matter from Non-Abelian Gauge Symmetry
Hajime Otsuka, Takashi Shimomura, Koji Tsumura +2
We propose a pseudo-Nambu-Goldstone boson (pNGB) dark matter (DM) model based on an additional non-Abelian gauge symmetry . The gauge symmetry is spontaneously b…
Zero-mode wave functions by localized gauge fluxes
Tatsuo Kobayashi, Hajime Otsuka, Makoto Sakamoto +3
We study chiral zero-mode wave functions on blow-up manifolds of orbifolds with both bulk and localized magnetic flux backgrounds. We introduce a singular gauge transform…
Index theorem on magnetized blow-up manifold of
Tatsuo Kobayashi, Hajime Otsuka, Makoto Sakamoto +3
We investigate blow-up manifolds of orbifolds with magnetic flux . Since the blow-up manifolds have no singularities, we can apply the Atiyah-S…
Generalized Matter Parities from Finite Modular Symmetries
Tatsuo Kobayashi, Satsuki Nishimura, Hajime Otsuka +2
We classify a supersymmetric extension of the Standard Model by discrete symmetries originating from finite modular symmetries . Since all the couplings in supersymmetric theo…
Residual flavor symmetry breaking in the landscape of modular flavor models
Keiya Ishiguro, Hiroshi Okada, Hajime Otsuka
We study a symmetry breaking of residual flavor symmetries realized at fixed points of the moduli space. In the supersymmetric modular invariant theories, a small departure of the…
Phenomenological implications on a hidden sector from the Festina Lente bound
Kayoung Ban, Dhong Yeon Cheong, Hiroshi Okada +3
We apply the Festina Lente (FL) bound on a hidden sector with gauge symmetries. Since the FL bound puts a lower bound on masses of particles charged under the gauge s…
Lepton flavor violation, lepton and electron EDM in the modular symmetry
Tatsuo Kobayashi, Hajime Otsuka, Morimitsu Tanimoto +1
We study the lepton flavor violation (LFV), the leptonic magnetic moments and the electric dipole moment (EDM) of the electron in the Standard-Model Effective Fiel…
Spacetime evolution during moduli stabilization in radiation dominated era beyond 4D effective theory
Hajime Otsuka, Yutaka Sakamura
We investigate the time evolution of the background spacetime during the moduli stabilization process, which is assumed to occur in the radiation dominated era. The setup is basica…
Modular symmetry of soft supersymmetry breaking terms
Shota Kikuchi, Tatsuo Kobayashi, Kaito Nasu +3
We study the modular symmetry of soft supersymmetry breaking terms. Soft scalar masses and -term coefficients are invariant under the modular symmetry when we regard -term as…
Radiative neutrino masses from modular symmetry and supersymmetry breaking
Hajime Otsuka, Hiroshi Okada
We investigate a modular invariant two-loop neutrino mass model in a supersymmetric framework, where we introduce new fields as minimum as possible, expecting contributions o…
4D modular flavor symmetric models inspired by higher dimensional theory
Shota Kikuchi, Tatsuo Kobayashi, Hajime Otsuka +3
We study a scenario to derive four-dimensional modular flavor symmetric models from higher dimensional theory by assuming the compactification consistent with the modular symmetry.…