635 citations · 6.2k across the 159 of their papers we have counts for
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Gauge mediation in supergravity and gravitino dark matter
Masahiro Ibe, Ryuichiro Kitano
Gravitinos and hidden sector fields often cause a cosmological disaster in supersymmetric models. We find that a model with gravitational gauge mediation solves such a problem quit…
Possible Signals of Wino LSP at the Large Hadron Collider
M. Ibe, Takeo Moroi, T. T. Yanagida
We consider a class of anomaly-mediated supersymmetry breaking models where gauginos acquire masses mostly from anomaly mediation while masses of other superparticles are from Kahl…
A New Inflation Model with Anomaly-mediated Supersymmetry Breaking
M. Ibe, Y. Shinbara, T. T. Yanagida
If there are a large number of vacua, multi-inflation may be a more mediocre phenomenon rather than a single inflation. In the multi-inflation scenario, new inflation is most likel…
Eluding the BBN constraints on the stable gravitino
W. Buchmuller, K. Hamaguchi, M. Ibe +1
We investigate how late-time entropy production weakens the Big-Bang Nucleosynthesis (BBN) constraints on the gravitino as lightest superparticle with a charged slepton as next-to-…
The Polonyi Problem and Upper bound on Inflation Scale in Supergravity
M. Ibe, Y. Shinbara, T. T. Yanagida
We reconsider the Polonyi problem in gravity-mediation models for supersymmetry (SUSY) breaking. It has been argued that there is no problem in the dynamical SUSY breaking scenario…
Minimal Supergravity, Inflation, and All That
M. Ibe, K. -I. Izawa, Y. Shinbara +1
We consider an inflationary model in the hidden-sector broken supergravity with an effectively large cutoff. The inflaton decay into right-handed neutrinos naturally causes the obs…