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arXiv · 2104.11248

Sterile neutrino dark matter in a U(1) extension of the standard model

Sho Iwamoto·Károly Seller·Zoltán Trócsányi
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Abstract

We explore the parameter space of a U(1) extension of the standard model -- also called the super-weak model -- from the point of view of explaining the observed dark matter energy density in the Universe. The new particle spectrum contains a complex scalar singlet and three right-handed neutrinos, among which the lightest one is the dark matter candidate. We explore both freeze-in and freeze-out mechanisms of dark matter production. In both cases, we find regions in the plane of the super-weak coupling vs. the mass of the new gauge boson that are not excluded by current experimental constraints. These regions are distinct and the one for freeze-out will be explored in searches for neutral gauge boson in the near future.

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Sho Iwamoto, Károly Seller, Zoltán Trócsányi. 2021-04-22. Sterile neutrino dark matter in a U(1) extension of the standard model. https://doi.org/10.1088/1475-7516/2022/01/035

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