199 citations · 4.2k across the 135 of their papers we have counts for
7 papers · 1 filter
Thermalization after/during Reheating
Keisuke Harigaya, Kyohei Mukaida
If reheating of the Universe takes place via Planck-suppressed decay, it seems that the thermalization of produced particles might be delayed, since they have large energy/small nu…
A Closer Look at Gaugino Masses in Pure Gravity Mediation Model/Minimal Split SUSY Model
Keisuke Harigaya, Masahiro Ibe, Tsutomu T. Yanagida
We take a closer look at the gaugino masses in the context of pure gravity mediation models/minimal split SUSY models. We see that the gaugino mass spectrum has a richer structure…
Lower Bound on the Garvitino Mass TeV in -Symmetry Breaking New Inflation
Keisuke Harigaya, Masahiro Ibe, Tsutomu T. Yanagida
In supersymmetric theories, the symmetry plays a unique role in suppressing a constant term in the superpotential. In single chiral field models of spontaneous breaking of a di…
Muon g-2 and LHC phenomenology in the gauge symmetric model
Keisuke Harigaya, Takafumi Igari, Mihoko M. Nojiri +2
In this paper, we consider phenomenology of a model with an gauge symmetry. Since the muon couples to the gauge boson (called boson), its contribution to…
The Peccei-Quinn Symmetry from a Gauged Discrete R Symmetry
Keisuke Harigaya, Masahiro Ibe, Kai Schmitz +1
The axion solution to the strong CP problem calls for an explanation as to why the Lagrangian should be invariant under the global Peccei-Quinn symmetry, U(1)_PQ, to such a high de…
Large Scale Cosmic Perturbation from Evaporation of Primordial Black Holes
Tomohiro Fujita, Keisuke Harigaya, Masahiro Kawasaki
We present a novel mechanism to generate the cosmic perturbation from evaporation of primordial black holes. A mass of a field is fluctuated if it is given by a vacuum expectation…
A Simple Solution to the Polonyi Problem in Gravity Mediation
Keisuke Harigaya, Masahiro Ibe, Kai Schmitz +1
The Polonyi field is a necessary ingredient in any viable scenario of gravity mediated supersymmetry breaking. However, it is known that the presence of the Polonyi field leads to…