88 citations · 1.1k across the 91 of their papers we have counts for
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Constraints on small-field axion inflation
Tatsuo Kobayashi, Akane Oikawa, Naoya Omoto +2
We study general class of small-field axion inflations which are the mixture of polynomial and sinusoidal functions suggested by the natural and axion monodromy inflations. The axi…
Axion decay constants at special points in type II string theory
Masaki Honda, Akane Oikawa, Hajime Otsuka
We propose the mechanism to disentangle the decay constant of closed string axion from the string scale in the framework of type II string theory on Calabi-Yau manifold. We find th…
Small field axion inflation with sub-Planckian decay constant
Kenji Kadota, Tatsuo Kobayashi, Akane Oikawa +3
We study an axion inflation model recently proposed within the framework of type IIB superstring theory, where we pay a particular attention to a sub-Planckian axion decay constant…
Flavor structure in heterotic string theory
Hiroyuki Abe, Tatsuo Kobayashi, Hajime Otsuka +2
We study the flavor structure in heterotic string theory on six-dimensional torus with magnetic fluxes. In particular, we focus on models with the flavor symmetries $SU(3)…
Moduli mediation without moduli-induced gravitino problem
Kensuke Akita, Tatsuo Kobayashi, Akane Oikawa +1
We study the moduli-induced gravitino problem within the framework of the phenomenologically attractive mirage mediations. The huge amount of gravitino generated by the moduli deca…