628 citations · 16.2k across the 353 of their papers we have counts for
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Light Higgsinos in Pure Gravity Mediation
Jason L. Evans, Masahiro Ibe, Keith A. Olive +1
Pure gravity mediation (PGM), with two free parameters, is a minimalistic approach to supergravity models, yet is capable of incorporating radiative electroweak symmetry breaking,…
Leptogenesis via Axion Oscillations after Inflation
Alexander Kusenko, Kai Schmitz, Tsutomu T. Yanagida
Once a light axionlike scalar field couples to the electroweak gauge bosons, its classical motion during reheating induces an effective chemical potential for the fermion number. I…
Chaotic Inflation from Nonlinear Sigma Models in Supergravity
Simeon Hellerman, John Kehayias, Tsutomu T. Yanagida
We present a common solution to the puzzles of the light Higgs or quark masses and the need for a shift symmetry and large field values in high scale chaotic inflation. One way to…
Lower bound of the tensor-to-scalar ratio in a nearly quadratic chaotic inflation model in supergravity
Keisuke Harigaya, Masahiro Kawasaki, Tsutomu T. Yanagida
We consider an initial condition problem in a nearly quadratic chaotic inflation model in supergravity. We introduce shift symmetry breaking not only in the superpotential but also…
Mass of Decaying Wino from AMS-02 2014
Masahiro Ibe, Shigeki Matsumoto, Satoshi Shirai +1
We revisit the decaying wino dark matter scenario in the light of the updated positron fraction, electron and positron fluxes in cosmic ray recently reported by the AMS-02 collabor…
R-symmetric Axion/Natural Inflation in Supergravity via Deformed Moduli Dynamics
Keisuke Harigaya, Masahiro Ibe, Tsutomu T. Yanagida
We construct a natural inflation model in supergravity where the inflaton is identified with a modulus field possessing a shift symmetry. The superpotential for the inflaton is gen…