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The Upper Bound of the Second Higgs Boson Mass in Minimal Gauge Mediation with the Gravitino Warm Dark Matter
Gongjun Choi, Tsutomu T. Yanagida, Norimi Yokozaki
A keV-scale gravitino arsing from a minimal supersymmetric (SUSY) Standard Model (MSSM) is an interesting possibility since the small scale problems that CDM model encounters in…
Shining Primordial Black Holes
Mark P. Hertzberg, Sami Nurmi, Enrico D. Schiappacasse +1
We study the well-motivated mixed dark matter (DM) scenario composed of a dominant thermal WIMP, highlighting the case of triplet fermion "winos", with a small fraction o…
NANOGrav results and LIGO-Virgo primordial black holes in axion-like curvaton model
Keisuke Inomata, Masahiro Kawasaki, Kyohei Mukaida +1
We discuss a possible connection between the recent NANOGrav results and the primordial black holes (PBHs) for the LIGO-Virgo events. In particular, we focus on the axion-like curv…
A Model of Interacting Dark Matter and Dark Radiation for and Tensions
Gongjun Choi, Tsutomu T. Yanagida, Norimi Yokozaki
We present a model describing the dark sector (DS) featured by two interactions remaining efficient until late times in the matter-dominated era after recombination: the interactio…
Proton Decay in Product Group Unification
Jason L. Evans, Masahiro Ibe, Tsutomu T. Yanagida
Product group unification is an attractive alternative to simple grand unification. It solves the infamous doublet-triplet splitting problem and the dimension-5 proton decay proble…
Dark Photon Dark Matter in the minimal Model
Gongjun Choi, Tsutomu T. Yanagida, Norimi Yokozaki
The extension of the Standard model (SM) with three heavy right handed neutrinos, a complex scalar and the gauged symmetry (the minimal model) is considered…