72 citations · 427 across the 26 of their papers we have counts for
26 papers
Dark photon and U(1) gauge boson from dark Higgs boson decays at FASER and SHiP
Takeshi Araki, Kento Asai, Yohei Nakashima +3
We study the sensitivity to dark photons and U(1) gauge bosons produced via dark Higgs boson decays at the FASER and SHiP experiments. In addition to pair production of the…
Dark photon pair production via off-shell dark Higgs at FASER
Takeshi Araki, Kento Asai, Yohei Nakashima +1
We consider a dark photon model in which the dark U(1) gauge symmetry is spontaneously broken by a vacuum expectation value of a new scalar boson. We focus on the ForwArd Search Ex…
New Constraint on Dark Photon at T2K Off-Axis Near Detector
Takeshi Araki, Kento Asai, Tomoya Iizawa +3
The T2K experiment is one of the most powerful long-baseline experiments to investigate neutrino oscillations. The off-axis near detector called ND280 is installed 280 m downstream…
Probing for chiral gauge boson through scattering measurement experiments
Kento Asai, Arindam Das, Jinmian Li +2
Motivated by the observation of tiny neutrino mass can not be explained within the framework of Standard Model (SM), we consider extra gauge extended scenarios in which tiny neutri…
Model Building by Coset Space Dimensional Reduction Scheme Using Twelve-Dimensional Coset Spaces
Kento Asai, Joe Sato, Ryosuke Suda +2
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…
Sub-GeV dark matter search at ILC beam dumps
Kento Asai, Sho Iwamoto, Maxim Perelstein +2
Light dark matter particles may be produced in electron and positron beam dumps of the International Linear Collider (ILC). We propose an experimental setup to search for such even…
Search for Lepton Flavor Violating Decay at FASER
Takeshi Araki, Kento Asai, Hidetoshi Otono +2
FASER is one of the promising experiments which search for long-lived particles beyond the Standard Model. In this paper, we consider charged lepton flavor violation (CLFV) via a l…
Asymmetric Mediator in Scotogenic Model
Kento Asai, Yuhei Sakai, Joe Sato +2
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 th…
Chiral in FASER, FASER2, DUNE, and ILC beam dump experiments
Kento Asai, Arindam Das, Jinmian Li +2
The origin of neutrino mass is a big unsolved problem of the Standard Model (SM) that motivate us to consider beyond the SM (BSM) scenarios where SM-singlet right-handed neutrinos…
Scalar Dark Matter with a Flavored Mediator
Kento Asai, Coh Miyao, Shohei Okawa +1
We study a renormalizable scalar singlet dark matter model based on lepton flavor symmetry. A -philic scalar doublet is introduced to explain the discrepancy between the…
The Forward Physics Facility at the High-Luminosity LHC
Jonathan L. Feng, Felix Kling, Mary Hall Reno +233
High energy collisions at the High-Luminosity Large Hadron Collider (LHC) produce a large number of particles along the beam collision axis, outside of the acceptance of existing L…
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…
Measuring Lepton Flavor Violation at LHC
K. Asai, J. Fujimoto, K. Kaneta +2
A new process with the lepton flavor violation (LFV) is presented in the setup for LHC. The LFV is induced by the one-loop effect through Higgs bosons in the framework of the type-…
Probing the - Gauge Boson at the MUonE Experiment
Kento Asai, Koichi Hamaguchi, Natsumi Nagata +2
We discuss the prospects of probing the gauge boson at the MUonE experiment. The gauge boson with a mass of MeV, which can explain t…
Electron Beam Dump Constraints on Light Bosons with Lepton Flavor Violating Couplings
Takeshi Araki, Kento Asai, Takashi Shimomura
We study constraints on light and feebly interacting bosons with lepton flavor violation from electron beam dump experiments. Scalar, vector, and dipole interactions of the bosons…
New physics searches at the ILC positron and electron beam dumps
Kento Asai, Sho Iwamoto, Yasuhito Sakaki +1
We study capability of the ILC beam dump experiment to search for new physics, comparing the performance of the electron and positron beam dumps. The dark photon, axion-like partic…
Leptophilic Gauge Bosons at ILC Beam Dump Experiment
Kento Asai, Takeo Moroi, Atsuya Niki
We study the prospects of searching for leptophilic gauge bosons (LGBs) at the beam dump experiment using beams of International Linear Collider (ILC). We consider…
Resolving the Hubble tension in a U(1) model with Majoron
Takeshi Araki, Kento Asai, Kei Honda +4
In this paper, we explore possibilities of resolving the Hubble tension and anomaly simultaneously in a U(1) model with Majoron. We only focus on a case wher…
Alternative Minimal U(1)
Kento Asai, Kazunori Nakayama, Shih-Yen Tseng
We provide a minimal alternative gauged U(1) model in which three right-handed neutrinos with charges of (5,-4,-4) and only one B-L Higgs field with charge 1 are introd…
Search for U(1) charged Dark Matter with neutrino telescope
Kento Asai, Shohei Okawa, Koji Tsumura
We study a simple Dirac fermion dark matter model in U(1) theory. The new light gauge boson plays important roles in both dark matter physics and the explanation fo…
Dark Photon from Light Scalar Boson Decays at FASER
Takeshi Araki, Kento Asai, Hidetoshi Otono +2
FASER is one of the promising experiments which search for long-lived particles beyond the Standard Model. In this paper, we focus on dark photon associating with an additional U(1…
Leptogenesis in the minimal gauged U(1) model and the sign of the cosmological baryon asymmetry
Kento Asai, Koichi Hamaguchi, Natsumi Nagata +1
The minimal gauged U(1) model is a simple extension of the Standard Model and has a strong predictive power for the neutrino sector. In particular, the mass spectrum an…
Low scale seesaw models for low scale symmetry
Takeshi Araki, Kento Asai, Joe Sato +1
We propose models for neutrino masses and mixing in the framework of low scale gauge extension of the standard model. The models are designed to spontaneously brea…
Predictions for the neutrino parameters in the minimal model extended by linear combination of U(1), U(1) and U(1) gauge symmetries
Kento Asai
We study the minimal extensions of the Standard Model by a linear combination of U(1), U(1) and U(1) gauge symmetries, where three right-handed neut…