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

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.

v1: 26 pages, 7 figures; v2: 29 pages, 7 figures. Accepted for publication in JCAP

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Cited by in corpus (8)

• Vacuum stability and scalar masses in the superweak extension of the standard model
• Revisiting sterile neutrino dark matter in gauged $U(1{)}_{B-L}$ model
• Experimental constraints on the neutrino and gauge parameters of the super-weak U(1) extension of the standard model
• Freeze-in sterile neutrino dark matter in a feebly gauged $B-L$ model
• Constraining flavour-universal nonstandard interactions and superweak extension of the standard model
• Real effective potentials for phase transitions in models with extended scalar sectors
• Neutrino specific spin-3/2 dark matter
• Precision Higgs Constraints in U(1) Extensions of the Standard Model with a Light Z'-Boson