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Freeze-In Dark Matter and Leptogenesis: a $\psi'$SM route

hep-ph · 2025-07-02 · unverdicted · novelty 4.0

In an E6-derived ψ'SM extension, a singlet fermion acts as freeze-in dark matter with relic density set by scalar decays for masses from a few MeV to hundreds of GeV, while type-I seesaw neutrinos simultaneously produce the observed baryon asymmetry via leptogenesis.

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  • Freeze-In Dark Matter and Leptogenesis: a $\psi'$SM route hep-ph · 2025-07-02 · unverdicted · none · ref 38

    In an E6-derived ψ'SM extension, a singlet fermion acts as freeze-in dark matter with relic density set by scalar decays for masses from a few MeV to hundreds of GeV, while type-I seesaw neutrinos simultaneously produce the observed baryon asymmetry via leptogenesis.