Joe Sato
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View article: Analytic prescription for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>t</mml:mi></mml:math>-channel singularities
Analytic prescription for -channel singularities Open
The t-channel singularity is a divergence in the scattering amplitude which occurs when a stable particle propagating in t-channel scattering process becomes an on-shell state. Such situations appear either in the system of collider experi…
View article: Gauge symmetry breaking with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>S</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math> extra dimensions
Gauge symmetry breaking with extra dimensions Open
We consider symmetry breaking of arbitrary gauge groups on a six-dimensional space-time which consists of a four-dimensional Minkowski space-time M4 and a two-dimensional sphere S2. We expand the gauge fields in the presence of a nontrivia…
View article: Gauge symmetry breaking with $S^2$ extra dimensions
Gauge symmetry breaking with $S^2$ extra dimensions Open
We consider symmetry breaking of arbitrary gauge groups on a six-dimensional space-time which consists of a four-dimensional Minkowski space-time $M^4$ and a two-dimensional sphere $S^2$. We expand the gauge fields in the presence of a non…
View article: An Analytic Prescription for $t$-channel Singularities
An Analytic Prescription for $t$-channel Singularities Open
The $t$-channel singularity is a divergence in the scattering amplitude which occurs when a stable particle propagating in $t$-channel scattering process becomes an on-shell state. Such situations appear either in the system of collider ex…
View article: T violation at a future neutrino factory (Contribution to the 25th International Workshop on Neutrinos from Accelerators)
T violation at a future neutrino factory (Contribution to the 25th International Workshop on Neutrinos from Accelerators) Open
We study the possibility of measuring T (time reversal) violation in a future long baseline neutrino oscillation experiment. By assuming a neutrino factory as a staging scenario of a muon collider at the J-PARC site, we find that the $ν_e …
View article: T violation at a future neutrino factory
T violation at a future neutrino factory Open
A bstract We study the possibility of measuring T (time reversal) violation in a future long baseline neutrino oscillation experiment. By assuming a neutrino factory as a staging scenario of a muon collider at the J-PARC site, we find that…
View article: T violation at a future neutrino factory
T violation at a future neutrino factory Open
We study the possibility of measuring T (time reversal) violation in a future long baseline neutrino oscillation experiment. By assuming a neutrino factory as a staging scenario of a muon collider at the J-PARC site, we find that the $ν_e …
View article: Contribution of Majoron to Hubble Tension in Gauged U(1)<i>L</i>μ – <i>L</i>τ Model
Contribution of Majoron to Hubble Tension in Gauged U(1)<i>L</i>μ – <i>L</i>τ Model Open
In this paper, we analyze parameter regions that can alleviate the Hubble tension in the U(1)$_{L_\mu - L_\tau }$ model with broken lepton number U(1)$_L$ symmetry. As new particles, this model has a U(1)$_{L_\mu - L_\tau }$ gauge boson $Z…
View article: Model building by coset space dimensional reduction scheme using eight-dimensional coset spaces
Model building by coset space dimensional reduction scheme using eight-dimensional coset spaces Open
A bstract We investigate the twelve-dimensional gauge-Higgs unification models with an eight- dimensional coset space as the extra space. For each model, we apply the coset space dimensional reduction procedure and examine the particle con…
View article: Contribution of Majoron to Hubble tension in gauged U(1)$_{L_μ-L_τ}$ Model
Contribution of Majoron to Hubble tension in gauged U(1)$_{L_μ-L_τ}$ Model Open
In this paper, we analyze parameter regions that can alleviate the Hubble tension in the U(1)$_{L_μ- L_τ}$ model with the broken lepton number U(1)$_L$ symmetry. As new particles, this model has a U(1)$_{L_μ- L_τ}$ gauge boson $Z'$ and a M…
View article: Model Building by Coset Space Dimensional Reduction Scheme Using Twelve-Dimensional Coset Spaces
Model Building by Coset Space Dimensional Reduction Scheme Using Twelve-Dimensional Coset Spaces Open
We investigate the twelve-dimensional gauge-Higgs unification models with an eight-dimensional coset space. For each model, we apply the coset space dimensional reduction procedure and examine the particle contents of the resulting four-di…
View article: Asymmetric Mediator in Scotogenic Model
Asymmetric Mediator in Scotogenic Model Open
The scotogenic model is the Standard Model (SM) with Z_2 symmetry and the addition of Z_2 odd right-handed Majorana neutrinos and SU(2)_L doublet scalar fields. We have extended the original scotogenic model by an additional Z_2 odd single…
View article: Determination of coupling patterns by parallel searches for $μ^-\to e^+$ and $μ^-\to e^-$ in muonic atoms
Determination of coupling patterns by parallel searches for $μ^-\to e^+$ and $μ^-\to e^-$ in muonic atoms Open
We investigate a possibility that the $μ^-\to e^+$ conversion is discovered prior to the $μ^-\to e^-$ conversion, and its implications to the new physics search. We focus on the specific model including the mixing of the $SU(2)_L$ doublet-…
View article: From Black Box to Shining Spotlight
From Black Box to Shining Spotlight Open
We introduce a pair of Shiny web applications that allow users to visualize random forest prediction intervals alongside those produced by linear regression models. The apps are designed to help undergraduate students deepen their understa…
View article: From Black Box to Shining Spotlight: Using Random Forest Prediction Intervals to Illuminate the Impact of Assumptions in Linear Regression
From Black Box to Shining Spotlight: Using Random Forest Prediction Intervals to Illuminate the Impact of Assumptions in Linear Regression Open
We introduce a pair of Shiny web applications that allow users to visualize random forest prediction intervals alongside those produced by linear regression models. The apps are designed to help undergraduate students deepen their understa…
View article: Resolving the Hubble tension in a U(1)$_{L_\mu-L_\tau}$ model with the Majoron
Resolving the Hubble tension in a U(1)$_{L_\mu-L_\tau}$ model with the Majoron Open
We explore the possibility of resolving the Hubble tension and $(g-2)_{\mu}$ anomaly simultaneously in a U(1)$_{L_\mu - L_\tau}$ model with Majoron. We only focus on the case where the Majoron $\phi$ does not exist at the beginning of the …
View article: Unification of L$_\mu$-L$_\tau$ and the standard model gauge group
Unification of L$_\mu$-L$_\tau$ and the standard model gauge group Open
In this letter we show a kind of \mt gauge symmetry can be unified into a simple group with the standard model gauge symmetry in the context of coset space unification. We also discuss some implication from one of this kind of unification.
View article: Sensitivity of indirect detection of Neutralino dark matter by Sommerfeld enhancement mechanism
Sensitivity of indirect detection of Neutralino dark matter by Sommerfeld enhancement mechanism Open
We have investigated neutralino dark matter in the framework of minimal supersymmetric Standard Model focusing on the coannihilatioin region. In this region, where the particle whose mass is tightly degenerated with the neutralino dark mat…
View article: Low scale seesaw models for low scale $U (1)_{L_\mu -L_\tau}$ symmetry
Low scale seesaw models for low scale $U (1)_{L_\mu -L_\tau}$ symmetry Open
We propose models for neutrino masses and mixing in the framework of low scale U(1) L µ -L τ gauge extension of the standard model.The models are designed to spontaneously break U(1) L µ -L τ so that the U(1) L µ -L τ gauge boson acquires …
View article: Distinguishing muon LFV effective couplings using $\mu+e^-\rightarrow e^-+e^-$
Distinguishing muon LFV effective couplings using $\mu+e^-\rightarrow e^-+e^-$ Open
A search for $\mu+e^-\rightarrow e^-+e^-$ process in a muonic atom is one of the promising probe for charged lepton flavor violation (CLFV). In this work, we investigate an asymmetry of the emitted electrons when the initial muon bound by …
View article: Big-bang nucleosynthesis and leptogenesis in the CMSSM
Big-bang nucleosynthesis and leptogenesis in the CMSSM Open
We have investigated the constrained minimal supersymmetric standard model\nwith three right-handed Majorana neutrinos whether there still is a parameter\nregion which is consistent with all existing experimental data/limits such as\nLepto…
View article: A proposal of a New Charged Lepton Flavor Violation Experiment: $\mu^-e^-\rightarrow e^-e^-\,$ in muonic atom
A proposal of a New Charged Lepton Flavor Violation Experiment: $\mu^-e^-\rightarrow e^-e^-\,$ in muonic atom Open
We propose a new process of $\mu^-e^-\rightarrow e^-e^-\,$ in a muonic atom for a quest of charged lepton flavor violation. The Coulomb attraction from the nucleus in a heavy muonic atom leads to significant enhancement in its rate, compar…
View article: Mind the Gap on IceCube: Cosmic neutrino spectrum and muon anomalous magnetic moment
Mind the Gap on IceCube: Cosmic neutrino spectrum and muon anomalous magnetic moment Open
The high energy cosmic neutrino spectrum reported by the IceCube collaboration shows a gap in the energy range between 500 TeV and 1 PeV. In this presentation, we illustrate that the IceCube gap is reproduced by the neutrino interaction me…
View article: MeV scale leptonic force for cosmic neutrino spectrum and muon anomalous magnetic moment
MeV scale leptonic force for cosmic neutrino spectrum and muon anomalous magnetic moment Open
Characteristic patterns of cosmic neutrino spectrum reported by the IceCube Collaboration and long-standing inconsistency between theory and experiment in muon anomalous magnetic moment are simultaneously explained by an extra leptonic for…
View article: Improved analysis of the CLFV decay of muonic atoms $\mu e\rightarrow e e$
Improved analysis of the CLFV decay of muonic atoms $\mu e\rightarrow e e$ Open
proposed the charged lepton flavor violation (CLFV) decay of the muonic atom µ -e -→ e -e -as one of the promising processes to search for new physics beyond the standard model [1].It was found that the attractive interaction of leptons wi…
View article: MeV scale leptonic force for cosmic neutrino spectrum and muon anomalous magnetic moment
MeV scale leptonic force for cosmic neutrino spectrum and muon anomalous magnetic moment Open
Characteristic patterns of cosmic neutrino spectrum reported by the IceCube collaboration and long-standing inconsistency between theory and experiment in muon anomalous magnetic moment are simultaneously explained by an extra leptonic for…