199 citations · 4.2k across the 135 of their papers we have counts for
6 papers · 1 filter
Model Independent Analysis of Interactions between Dark Matter and Various Quarks
Biplob Bhattacherjee, Debajyoti Choudhury, Keisuke Harigaya +2
Present and future expected limits on interactions between dark matter and various quarks are thoroughly investigated in a model-independent way. In particular, the constraints on…
Chaotic Inflation with a Fractional Power-Law Potential in Strongly Coupled Gauge Theories
Keisuke Harigaya, Masahiro Ibe, Kai Schmitz +1
Models of chaotic inflation with a fractional power-law potential are not only viable but also testable in the foreseeable future. We show that such models can be realized in simpl…
Non-Gaussianity from Attractor Curvaton
Keisuke Harigaya, Masahiro Ibe, Masahiro Kawasaki +1
We propose a curvaton model in which the initial condition of the curvaton oscillation is determined by its attractor behavior during inflation. Assuming a chaotic inflation model,…
High Scale SUSY Breaking From Topological Inflation
Keisuke Harigaya, Masahiro Kawasaki, Tsutomu T. Yanagida
The recently observed mass ~ 125 GeV for the Higgs boson suggests a high-energy scale SUSY breaking, above O(10) TeV. It is, however, very puzzling why nature chooses such a high e…
Seesaw Mechanism with Occam's Razor
Keisuke Harigaya, Masahiro Ibe, Tsutomu T. Yanagida
We discuss the seesaw mechanism which includes the minimum number of parameters for successful leptogenesis and three neutrino oscillations in the spirit of Occam's razor. We show…
Search for the Top Partner at the LHC using Multi-b-Jet Channels
Keisuke Harigaya, Shigeki Matsumoto, Mihoko M. Nojiri +1
Vector-like quarks are introduced in various new physics models beyond the standard model (SM) at the TeV scale. We especially consider the case that the quark is singlet (triplet)…