269 citations · 709 across the 27 of their papers we have counts for
27 papers
Is the Coleman de Luccia action minimum?: AdS/CFT approach
Naritaka Oshita, Yutaro Shoji, Masahide Yamaguchi
We use the anti-de Sitter/conformal field theory (AdS/CFT) correspondence to find the least bounce action in an AdS false vacuum state, i.e., the most probable decay process of the…
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…
Heating Galaxy Clusters with Interacting Dark Matter
Yutaro Shoji, Eric Kuflik, Yuval Birnboim +1
The overcooling of cool core clusters is a persistent puzzle in the astrophysics of galaxy clusters. We propose that it may naturally be resolved via interactions between the baryo…
Path Integral for Mixed Tunneling, Polychronic Tunneling and Quantum Gravity
Yutaro Shoji
Quantum tunneling in a many-body system is much more non-trivial than that in a one-body system. The most characteristic phenomenon is the mixed tunneling, which has been studied i…
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 International Linear Collider: Report to Snowmass 2021
Alexander Aryshev, Ties Behnke, Mikael Berggren +508
The International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in the 2030s. The ILC addresses key questions for our…
Polychronic Tunneling: New Tunneling Processes Experiencing Euclidean and Lorentzian Evolution Simultaneously
Naritaka Oshita, Yutaro Shoji, Masahide Yamaguchi
We discuss new possible tunneling processes in the presence of gravity. We formulate quantum tunneling using the Wheeler-deWitt canonical quantization and the WKB approximation. Th…
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…
Detection capability of Migdal effect for argon and xenon nuclei with position sensitive gaseous detectors
Kiseki D. Nakamura, Kentaro Miuchi, Shingo Kazama +3
Migdal effect is attracting interests because of the potential to enhance the sensitivities of direct dark matter searches to the low mass region. In spite of its great importance,…
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…