51 citations · 356 across the 21 of their papers we have counts for
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Bosonic-Seesaw Portal Dark Matter
Hiroyuki Ishida, Shinya Matsuzaki, Yuya Yamaguchi
We discuss a new type of Higgs-portal dark matter (DM)-production mechanism, called bosonic-seesaw portal (BSP) scenario. The BS provides the dynamical origin of the electroweak sy…
Naturalness and lepton number/flavor violation in inverse seesaw models
Naoyuki Haba, Hiroyuki Ishida, Yuya Yamaguchi
We introduce three right-handed neutrinos and three sterile neutrinos, and consider an inverse seesaw mechanism for neutrino mass generation. From naturalness point of view, their…
Multiple-point principle with a scalar singlet extension of the Standard Model
Naoyuki Haba, Hiroyuki Ishida, Nobuchika Okada +1
We suggest a scalar singlet extension of the standard model, in which the multiple-point principle (MPP) condition of a vanishing Higgs potential at the Planck scale is realized. A…
Invisible Axion-Like Dark Matter from Electroweak Bosonic Seesaw
Hiroyuki Ishida, Shinya Matsuzaki, Yuya Yamaguchi
We explore a model based on the classically-scale invariant standard model (SM) with a strongly coupled vector-like dynamics, which is called hypercolor (HC). The scale symmetry is…
Vacuum stability and naturalness in type-II seesaw
Naoyuki Haba, Hiroyuki Ishida, Nobuchika Okada +1
We study the vacuum stability and perturbativity conditions in the minimal type-II seesaw model. These conditions give characteristic constraints to model parameters. In the model,…