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20232025
most citedNew Constraints on Gauged U(1) Models via Mixing

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hep-ph2025

Cosmological Bounds on Scotogenic Model with Asymmetric Mediator

Kento Asai, Seishi Enomoto, Takuya Hirose +1

We study cosmological constraints on the asymmetric mediator scenario, a variant of the scotogenic model that addresses the origins of neutrino masses, dark matter (DM), and the ba…

hep-ph2025

Gauge symmetry breaking with extra dimensions

Kento Asai, Yuki Honda, Hiroki Ishikawa +2

We consider symmetry breaking of arbitrary gauge groups on a six-dimensional space-time which consists of a four-dimensional Minkowski space-time and a two-dimensional sphere…

hep-ph2025

An Analytic Prescription for -channel Singularities

Kento Asai, Nagisa Hiroshima, Joe Sato +2

The -channel singularity is a divergence in the scattering amplitude which occurs when a stable particle propagating in -channel scattering process becomes an on-shell state.…

hep-ph2024★ 1 cited

New Constraints on Gauged U(1) Models via Mixing

Kento Asai, Coh Miyao, Shohei Okawa +1

It is known that the model based on U(1) gauge symmetry can explain not only the discrepancy between the measured value of muon and the theoretical prediction, bu…

hep-ph2023

Contribution of Majoron to Hubble tension in gauged U(1) Model

Kento Asai, Tomoya Asano, Joe Sato +1

In this paper, we analyze parameter regions that can alleviate the Hubble tension in the U(1) model with the broken lepton number U(1) symmetry. As new particles,…