228 citations · 2.3k across the 87 of their papers we have counts for
62 papers · 1 filter
Real and Virtual Propagation in Neutrino Oscillations
Kenji Nishiwaki, Kin-ya Oda, Juntaro Wada
We revisit flavor oscillations in vacuum in terms of the propagation time of intermediate states. In the limit of a long propagation time (or distance), degenerate intermediate sta…
Implementing Errors on Errors: Bayesian vs Frequentist
Satoshi Mishima, Kin-ya Oda
When combining apparently inconsistent experimental results, one often implements errors on errors. The Particle Data Group's phenomenological prescription offers a practical solut…
A common origin of two accelerating universes: inflation and dark energy
Kunio Kaneta, Kin-ya Oda, Motohiko Yoshimura
We develop a quantum theory of inflaton and its decay product of various gauge boson pairs to investigate the preheating towards thermalized universe. The inflaton decay into gauge…
Parametrically amplified super-radiance towards hot big bang universe
Motohiko Yoshimura, Kunio Kaneta, Kin-ya Oda
We propose a mechanism of preheating stage after inflation, using a new idea of parametrically amplified super-radiance. Highly coherent state, characterized by macro-coherence of…
Pseudo-Nambu-Goldstone Boson Production from Inflaton Coupling during Reheating
Kunio Kaneta, Sung Mook Lee, Kin-ya Oda +1
The existence of pseudo-Nambu-Goldstone boson (pNGB) fields is a common feature in many models beyond the Standard Model, characterized by their exclusive derivative couplings. Thi…
Higgs Alignment from Multicritical-Point Principle in Two Higgs Doublet Models
Hikaru Kawai, Kiyoharu Kawana, Kin-ya Oda +1
In models with non-minimal Higgs sectors, enforcing (near) Higgs alignment, necessary to prevent significant deviations in the Higgs boson coupling from the standard model predicti…
Gaussian Formalism: Joint Measurement for Heisenberg's Uncertainty Relation for Errors by Squeezed Coherent States
Kin-ya Oda, Naoya Ogawa
We point out that the Gaussian wave-packet formalism can serve as a concrete realization of the joint measurement of position and momentum, which is an essential element in underst…
Wave-Packet Effects: A Solution for Isospin Anomalies in Vector-Meson Decay
Kenzo Ishikawa, Osamu Jinnouchi, Kenji Nishiwaki +1
There is a long-standing anomaly in the ratio of the decay width for to that for at the level of . A similar anomaly exis…
Decoherence in Neutrino Oscillation between 3D Gaussian Wave Packets
Haruhi Mitani, Kin-ya Oda
There is renewed attention to whether we can observe the decoherence effect in neutrino oscillation due to the separation of wave packets with different masses in near-future exper…
Non-thermal Higgs Spectrum in Reheating Epoch: Primordial Condensate vs. Stochastic Fluctuation
Kunio Kaneta, Kin-ya Oda
Since electroweak symmetry is generally broken during inflation, the Standard Model Higgs field can become supermassive even after the end of inflation. In this paper, we study the…
Constraints on extended Jordan-Brans-Dicke gravity
Kunio Kaneta, Kin-ya Oda, Motohiko Yoshimura
Cosmological analysis of extended Jordan-Brans-Dicke (eJBD) gravity is presented in the Einstein metric frame in which gravitational interaction is readily understandable. Our form…
Ultraviolet Sensitivity in Higgs-Starobinsky Inflation
Sung Mook Lee, Tanmoy Modak, Kin-ya Oda +1
The general scalar-tensor theory that includes all the dimension-four terms has parameter regions that can produce successful inflation consistent with cosmological observations. T…
Gravitational waves in models with multicritical-point principle
Yuta Hamada, Hikaru Kawai, Kiyoharu Kawana +2
The multicritical-point principle (MPP) provides a natural explanation of the large hierarchy between the Planck and electroweak scales. We consider a scenario in which MPP is appl…
The -Higgs inflation with two Higgs doublets
Sung Mook Lee, Tanmoy Modak, Kin-ya Oda +1
We study -Higgs inflation in a model with two Higgs doublets in which the Higgs sector of the Standard Model is extended by an additional Higgs doublet, thereby four scalar fi…
Minimal scenario of Criticality for Electroweak scale, Neutrino Masses, Dark Matter, and Inflation
Yuta Hamada, Hikaru Kawai, Kiyoharu Kawana +2
We propose a minimal model that can explain the electroweak scale, neutrino masses, Dark Matter (DM), and successful inflation all at once based on the multicritical-point principl…
Spontaneous Leptogenesis in Higgs Inflation
Sung Mook Lee, Kin-ya Oda, Seong Chan Park
We propose a scenario of spontaneous leptogenesis in Higgs inflation with help from two additional operators: the Weinberg operator (Dim 5) and the derivative coupling of the Higgs…
Dark matter in minimal dimensional transmutation with multicritical-point principle
Yuta Hamada, Hikaru Kawai, Kin-ya Oda +1
We investigate a model with two real scalar fields that minimally generates exponentially different scales in an analog of the Coleman-Weinberg mechanism. The classical scale invar…
Echoes of 2HDM inflation at the collider experiments
Tanmoy Modak, Kin-ya Oda
We study the correlation between the constraints on general two Higgs doublet model from Higgs inflation and from collider experiments. The parameter space receives meaningful cons…
Proton Decay and Axion Dark Matter in SO(10) Grand Unification via Minimal Left-Right Symmetry
Yuta Hamada, Masahiro Ibe, Yu Muramatsu +2
We study the proton lifetime in the Grand Unified Theory (GUT), which has the left-right (LR) symmetric gauge theory below the GUT scale. In particular, we focus on the mi…
Higgs inflation in metric and Palatini formalisms: Required suppression of higher dimensional operators
Ryusuke Jinno, Mio Kubota, Kin-ya Oda +1
We investigate the sensitivity of Higgs(-like) inflation to higher dimensional operators in the nonminimal couplings and in the potential, both in the metric and Palatini formalism…
Particle decay in Gaussian wave-packet formalism revisited
Kenzo Ishikawa, Kin-ya Oda
We derive the Fermi's golden rule in the Gaussian wave-packet formalism of quantum field theory, proposed by Ishikawa, Shimomura, and Tobita, for the particle decay within a finite…
Cosmological implications of Standard Model criticality and Higgs inflation
Yuta Hamada, Hikaru Kawai, Yukari Nakanishi +1
The observed Higgs mass indicates that the Standard Model can be valid up to near the Planck scale . Within this framework, it is important to examine how little modifi…
Hillclimbing Higgs inflation
Ryusuke Jinno, Kunio Kaneta, Kin-ya Oda
We propose a realization of cosmic inflation with the Higgs field when the Higgs potential has degenerate vacua by employing the recently proposed idea of hillclimbing inflation. T…
Di-higgs enhancement by neutral scalar as probe of new colored sector
Koji Nakamura, Kenji Nishiwaki, Kin-ya Oda +2
We study a class of models in which the Higgs pair production is enhanced at hadron colliders by an extra neutral scalar. The scalar particle is produced by the gluon fusion via a…