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- University of ShimaneJP36 papers
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- Kobe UniversityJP6 papers
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- Japan Synchrotron Radiation Research InstituteJP5 papers
- Kavli Institute for the Physics and Mathematics of the UniverseJP5 papers
9 papers · 2 filters
Hierarchy problem, gauge coupling unification at the Planck scale, and vacuum stability
Naoyuki Haba, Hiroyuki Ishida, Ryo Takahashi +1
From the point of view of the gauge hierarchy problem, introducing an intermediate scale in addition to TeV scale and the Planck scale (…
Gravitational effects on vanishing Higgs potential at the Planck scale
Naoyuki Haba, Kunio Kaneta, Ryo Takahashi +1
We investigate gravitational effects on the so-called multiple point criticality principle (MPCP) at the Planck scale. The MPCP requires two degenerate vacua, whose necessary condi…
dark matter-philic Higgs for 3.5 keV X-ray signal
Naoyuki Haba, Hiroyuki Ishida, Ryo Takahashi
We suggest a new model of 7 keV right-handed neutrino dark matter inspired by a recent observation of 3.5 keV X-ray line signal in the XMM-Newton observatory. It is difficult to de…
Vanishing Higgs potential at the Planck scale in a singlet extension of the standard model
Naoyuki Haba, Hiroyuki Ishida, Kunio Kaneta +1
We discuss the realization of a vanishing effective Higgs potential at the Planck scale, which is required by the multiple-point criticality principle (MPCP), in the standard model…
Realization of lepton masses and mixing angles from point interactions in an extra dimension
Yukihiro Fujimoto, Kenji Nishiwaki, Makoto Sakamoto +1
We investigate a model on an extra dimension where plenty of effective boundary points described by point interactions (zero-thickness branes) are arranged. After suitably se…
Higgs inflation and Higgs portal dark matter with right-handed neutrinos
Naoyuki Haba, Hiroyuki Ishida, Ryo Takahashi
We investigate the Higgs inflation and the Higgs portal dark matter with the right-handed neutrino. The dark matter and the right-handed neutrino in the Higgs inflation play import…