Gauged $U(1{)}_X$ breaking as origin of neutrino masses, dark matter and leptogenesis at TeV scale

Abstract

We propose a new mechanism which simultaneously explains tiny neutrino masses, stability of dark matter and baryon asymmetry of the Universe via leptogenesis due to the common origin: a spontaneous breaking of a $U(1{)}_X$ gauge symmetry at TeV scale. The $U(1{)}_X$ breaking provides small Majorana masses of vector-like leptons which generate small mass differences among them, and enhance their CP-violating decays via the resonant effect. Such CP-violation and lepton number violation turns out to be a sufficient amount of the observed baryon asymmetry through leptogenesis. The Majorana masses from the $U(1{)}_X$ breaking also induce radiative generation of masses for active neutrinos at one-loop level. Furthermore, a $Z_2$ symmetry appears as a remnant of the $U(1{)}_X$ breaking, which guarantees the stability of dark matter. We construct a simple renormalizable model to realize the above mechanism, and show a benchmark point which can explain observed neutrino oscillations, dark matter data and the baryon asymmetry at the same time.

arXiv commentVersion accepted for publication in PRD, 6 pages, 5 figures

References in corpus (10)

• Verifiable Radiative Seesaw Mechanism of Neutrino Mass and Dark Matter
• The fate of hints: updated global analysis of three-flavor neutrino oscillations
• Resonant Leptogenesis
• Improved Naturalness with a Heavy Higgs: An Alternative Road to LHC Physics
• CP Violation and Baryogenesis due to Heavy Majorana Neutrinos
• Low-Scale Leptogenesis in the Scotogenic Neutrino Mass Model
• TeV scale leptogenesis, inflaton dark matter and neutrino mass in a scotogenic model
• Leptogenesis and dark matter detection in a TeV scale neutrino mass model with inverted mass hierarchy
• Fermion Dark Matter with $N_2$ Leptogenesis in Minimal Scotogenic Model
• Scalar dark matter and leptogenesis in the minimal scotogenic model