269 citations · 709 across the 27 of their papers we have counts for
21 papers · 1 filter
Stability of Electroweak Vacuum and Supersymmetric Contribution to Muon g-2
So Chigusa, Takeo Moroi, Yutaro Shoji
We study the stability of the electroweak vacuum in the supersymmetric (SUSY) standard model (SM), paying particular attention to its relation to the SUSY contribution to the muon…
models with modular symmetry
Takaaki Nomura, Hiroshi Okada, Yutaro Shoji
We study models with modular symmetry that provide unified description of the quark and lepton sector including the flavor structures.…
Upper bound on the smuon mass from vacuum stability in the light of muon anomaly
So Chigusa, Takeo Moroi, Yutaro Shoji
We derive an upper bound on the smuon mass assuming that the muon anomaly is explained by the supersymmetric (SUSY) contribution. In the minimal SUSY standard model, the SUSY…
The Phonon Background from Gamma Rays in Sub-GeV Dark Matter Detectors
Kim V. Berghaus, Rouven Essig, Yonit Hochberg +2
High-energy photons with (MeV) energies from radioactive contaminants can scatter in a solid-state target material and constitute an important low-energy background fo…
Radiative dark matter and neutrino masses from an alternative gauge symmetry
Hiroshi Okada, Yuta Orikasa, Yutaro Shoji
We propose a model where the masses of the active neutrinos and a dark matter candidate are generated radiatively through the gauge symmetry breaking. It is realized b…
Precise Calculation of the Decay Rate of False Vacuum with Multi-Field Bounce
So Chigusa, Takeo Moroi, Yutaro Shoji
We study the decay rate of a false vacuum in gauge theory at the one-loop level. We pay particular attention to the case where the bounce consists of an arbitrary number of scalar…
Dirac dark matter in a radiative neutrino model
Hiroshi Okada, Yutaro Shoji
We propose a simple radiative neutrino mass scenario with a Dirac dark matter candidate, which is minimally realized by a Z3 symmetry. We introduce two Dirac neutrinos and two iner…
High Scale Validity of the DFSZ Axion Model with Precision
Satsuki Oda, Yutaro Shoji, Dai-suke Takahashi
With the assumption of classical scale invariance at the Planck scale, the DFSZ axion model can generate the Higgs mass terms of the appropriate size through technically natural pa…
Maximum value of the spin-independent cross section in the THDM+a
Tomohiro Abe, Motoko Fujiwara, Junji Hisano +1
We investigate the maximum value of the spin-independent cross section () in a dark matter (DM) model called the two-Higgs doublet model + a (THDM+a). This model can e…
To be, or not to be finite? The Higgs potential in Gauge-Higgs Unification
Junji Hisano, Yutaro Shoji, Atsuyuki Yamada
In this paper, we investigate the finiteness of the Higgs effective potential in an Gauge-Higgs Unification (GHU) model defined on . We…
Bounce Configuration from Gradient Flow
So Chigusa, Takeo Moroi, Yutaro Shoji
Based on the gradient flow, we propose a new method to determine the bounce configuration for false vacuum decay. Our method is applicable to a large class of models with multiple…
Fast-Rolling Relaxion
Masahiro Ibe, Yutaro Shoji, Motoo Suzuki
We discuss new mechanisms to stop the relaxion field during inflation. They can be realized in a generic model, including the original model but in a quite different parameter regi…
Decay Rate of Electroweak Vacuum in the Standard Model and Beyond
So Chigusa, Takeo Moroi, Yutaro Shoji
We perform a precise calculation of the decay rate of the electroweak vacuum in the standard model as well as in models beyond the standard model. We use a recently-developed techn…
State-of-the-Art Calculation of the Decay Rate of Electroweak Vacuum in Standard Model
So Chigusa, Takeo Moroi, Yutaro Shoji
The decay rate of the electroweak (EW) vacuum is calculated in the framework of the standard model (SM) of particle physics, using the recent progresses in the understanding of the…
Migdal Effect in Dark Matter Direct Detection Experiments
Masahiro Ibe, Wakutaka Nakano, Yutaro Shoji +1
The elastic scattering of an atomic nucleus plays a central role in dark matter direct detection experiments. In those experiments, it is usually assumed that the atomic electrons…
False Vacuum Decay in Gauge Theory
Motoi Endo, Takeo Moroi, Mihoko M. Nojiri +1
The decay rate of a false vacuum is studied in gauge theory, paying particular attention to its gauge invariance. Although the decay rate should not depend on the gauge parameter $…
On the Gauge Invariance of the Decay Rate of False Vacuum
Motoi Endo, Takeo Moroi, Mihoko M. Nojiri +1
We study the gauge invariance of the decay rate of the false vacuum for the model in which the scalar field responsible for the false vacuum decay has gauge quantum number. In orde…
Renormalization-Scale Uncertainty in the Decay Rate of False Vacuum
Motoi Endo, Takeo Moroi, Mihoko M. Nojiri +1
We study radiative corrections to the decay rate of false vacua, paying particular attention to the renormalization-scale dependence of the decay rate. The decay rate exponentially…
Higgs Mixing in the NMSSM and Light Higgsinos
Kwang Sik Jeong, Yutaro Shoji, Masahiro Yamaguchi
We explore the effects of Higgs mixing in the general next-to-minimal supersymmetric Standard Model (NMSSM). Extended to include a gauge singlet, the Higgs sector can naturally exp…
Singlet-doublet Higgs mixing and its implications on the Higgs mass in the PQ-NMSSM
Kwang Sik Jeong, Yutaro Shoji, Masahiro Yamaguchi
We examine the implications of singlet-doublet Higgs mixing on the properties of a Standard Model (SM)-like Higgs boson within the Peccei-Quinn invariant extension of the NMSSM (PQ…
Peccei-Quinn invariant extension of the NMSSM
Kwang Sik Jeong, Yutaro Shoji, Masahiro Yamaguchi
We study a Peccei-Quinn invariant extension of the next-to-minimal supersymmetric Standard Model (NMSSM), which turns out to be free from the tadpole and domain wall problems. Havi…