156 citations · 566 across the 16 of their papers we have counts for
11 papers · 1 filter
Spontaneous Non-thermal Leptogenesis in High-scale Inflation Models
Motoi Endo, Fuminobu Takahashi, T. T. Yanagida
We argue that a non-thermal leptogenesis occurs spontaneously, without direct couplings of the inflaton with right-handed neutrinos, in a wide class of high-scale inflation models…
The Gravitino-Overproduction Problem in Inflaton Decay
Masahiro Kawasaki, Fuminobu Takahashi, T. T. Yanagida
We show that the gravitino-overproduction problem is prevalent among inflation models in supergravity. An inflaton field generically acquires (effective) non-vanishing auxiliary fi…
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…
Stau-catalyzed Nuclear Fusion
K. Hamaguchi, T. Hatsuda, T. T. Yanagida
We point out that the stau may play a role of a catalyst for nuclear fusions if the stau is a long-lived particle as in the scenario of gravitino dark matter. In this letter, we co…
Inflaton Decay through Supergravity Effects
Motoi Endo, Masahiro Kawasaki, Fuminobu Takahashi +1
We point out that supergravity effects enable the inflaton to decay into all matter fields, including the visible and the supersymmetry breaking sectors, once the inflaton acquires…