51 citations · 356 across the 21 of their papers we have counts for
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Gravitational wave from dark sector with dark pion
Koji Tsumura, Masatoshi Yamada, Yuya Yamaguchi
In this work, we investigate the spectra of gravitational waves produced by chiral symmetry breaking in dark quantum chromodynamics (dQCD) sector. The dark pion () can be a dark…
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,…
A new dynamics of electroweak symmetry breaking with classically scale invariance
Naoyuki Haba, Hiroyuki Ishida, Noriaki Kitazawa +1
We propose a new dynamics of the electroweak symmetry breaking in a classically scale invariant version of the standard model. The scale invariance is broken by the condensations o…
Gauge coupling unification in a classically scale invariant model
Naoyuki Haba, Hiroyuki Ishida, Ryo Takahashi +1
There are a lot of works within a class of classically scale invariant model, which is motivated by solving the gauge hierarchy problem. In this context, the Higgs mass vanishes at…
Electroweak symmetry breaking through bosonic seesaw mechanism in a classically conformal extension of the Standard Model
Naoyuki Haba, Hiroyuki Ishida, Nobuchika Okada +1
We suggest the so-called bosonic seesaw mechanism in the context of a classically conformal extension of the Standard Model with two Higgs doublet fields. The $U(1)_{B…
Bosonic seesaw mechanism in a classically conformal extension of the Standard Model
Naoyuki Haba, Hiroyuki Ishida, Nobuchika Okada +1
We suggest the so-called bosonic seesaw mechanism in the context of a classically conformal extension of the Standard Model with two Higgs doublet fields. The $U(1)_{B…
What triggers discrepancy between Daya Bay and T2K?
Naoyuki Haba, Hiroyuki Ishida, Kyousuke Shimada +1
There seems to be a non-negligible discrepancy between Daya Bay and T2K experimental results of a neutrino mixing angle, . We show the discrepancy can be simply passed awa…
Hierarchy problem, gauge coupling unification at the Planck scale, and vacuum stability
Yuya Yamaguchi
To solve the hierarchy problem of the Higgs mass, it may be suggested that there are no an intermediate scale up to the Planck scale except for the TeV scale. For this motivation,…
Vacuum stability in the extended model with vanishing scalar potential at the Planck scale
Naoyuki Haba, Yuya Yamaguchi
We investigate the vacuum stability in a scale invariant local model with vanishing scalar potential at the Planck scale. We find that it is impossible to realize the Higg…
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…
Axion monodromy inflation with multi-natural modulations
Tetsutaro Higaki, Tatsuo Kobayashi, Osamu Seto +1
We study parameter space in the axion monodromy inflation corrected by dynamically generated terms involving with the axion. The potential has the linear potential with multiple si…
Axion monodromy inflation with sinusoidal corrections
Tatsuo Kobayashi, Osamu Seto, Yuya Yamaguchi
We study the axion monodromy inflation with a non-perturbatively generated sinusoidal term. The potential form is a mixture between the natural inflation and the axion monodromy in…
Accurate renormalization group analyses in neutrino sector
Naoyuki Haba, Kunio Kaneta, Ryo Takahashi +1
We investigate accurate renormalization group analyses in neutrino sector between -oscillation and seesaw energy scales. We consider decoupling effects of top quark and Higgs bo…
Neutrino mass from neutrinophilic Higgs and leptogenesis
Naoyuki Haba, Osamu Seto, Yuya Yamaguchi
In a class of two Higgs doublet model, where one Higgs doublet generates masses of quarks and charged leptons whereas the other Higgs doublet with a tiny vacuum expectation value (…
Resonant leptogenesis with mild degeneracy
Naoyuki Haba, Osamu Seto, Yuya Yamaguchi
Under the assumption of hierarchical right-handed neutrino masses, masses of right-handed neutrinos must be larger than GeV in the standard thermal leptogenesis scenario, wh…