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Preprint Oct 2026

Boson-Fermion Atomic Dark Matter

We propose a simple scenario of boson-fermion atomic dark matter, in which the dark matter abundance originates from a primordial particle-antiparticle asymmetry. The dark sector consists of a complex scalar and a Dirac fermion carrying opposite charges under an unbroken U(1)$_D$ gauge symmetry. Their asymmetries are g...

N. Nagata, T. T. Yanagida · 0 citations
Preprint Oct 2026

From the LZ Event to Grand Unification: Heavy Higgsinos and Proton Decay

The recently reported LUX-ZEPLIN (LZ) event has renewed interest in inelastic Higgsino dark matter. While a weak-scale Higgsino provides a simple interpretation of the event, such a scenario is in tension with the IceCube bound from dark-matter capture and annihilation in the Sun. This tension can be avoided for a much...

S. Hor, N. Nagata, T. T. Yanagida · 3 citations

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