Author

Hiroshi Okada

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Preprint Sep 2026

Can a minimal radiative seesaw explain the LZ 248 keV event?

We interpret the recently reported 248~keV nuclear recoil event in the LUX-ZEPLIN (LZ) experiment via inelastic dark matter scattering within the minimal Scotogenic model. A sub-MeV mass splitting between neutral inert scalars suppresses low-energy scattering while permitting signals from the high-velocity halo tail. C...

Hiroshi Okada, Yoshihiro Shigekami, Jia-Jun Wu · 24 citations

Preprint Sep 2026

Radiative double inverse seesaw and dark matter in an alternative gauged $U(1)_{B-L}$ model

We propose a concrete theoretical framework for the double inverse seesaw mechanism within an alternative gauged $U(1)_{B-L}$ model, where the tiny neutrino masses emerge radiatively at the loop level in accordance with the't Hooft naturalness criterion. By assigning non-universal $B-L$ charges of $(-4, -4, 5)$ to the...

Hiroshi Okada, L. Singh · 4 citations