Yuji Omura

collaborators

3 papers

hep-ph2025

Novel bounds on neutrino portal dark matter from leptonic meson decays

Shohei Okawa, Yuji Omura

We investigate the potential of leptonic meson decays $M \to ℓ ν ˉ_{ℓ}$ , where $M$ is a pseudo-scalar meson, as a probe of neutrino portal dark matter. The model of our focus…

hep-ph2025

Dirac neutrino and dark matter in left-right symmetric models

Shohei Okawa, Yuji Omura, Keyun Wu

We study neutrino mass generation and dark matter in a left-right symmetric model. The model is based on an $S U (3)_{c} \times S U (2)_{L} \times S U (2)_{R} \times U (1)_{B - L}$ gauge theory wi…

hep-ph2023

Light mass window of inert doublet dark matter with lepton portal interaction

Ryo Higuchi, Syuhei Iguro, Shohei Okawa +1

We study phenomenology of a light scalar dark matter (DM). In the model, there are an inert doublet scalar and a singlet Dirac fermion $ψ$ , both charged under a global $Z_{2}$ symmet…