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Dark matter progenitor: Light vector boson decay into sterile neutrinos

Brian Shuve* and Itay Yavin†

  • Perimeter Institute for Theoretical Physics, 31 Caroline Street North, Waterloo, Ontario, Canada N2L 2Y5
  • Department of Physics & Astronomy, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4L8

  • *bshuve@perimeterinstitute.ca
  • †iyavin@perimeterinstitute.ca
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Phys. Rev. D 89, 113004 – Published 11 June, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.113004

Abstract

We show that the existence of new, light gauge interactions coupled to Standard Model (SM) neutrinos gives rise to an abundance of sterile neutrinos through the sterile neutrinos’ mixing with the SM. Specifically, in the mass range of MeV–GeV and coupling of g′∼10−6–10−3, the decay of this new vector boson in the early Universe produces a sufficient quantity of sterile neutrinos to account for the observed dark matter abundance. Interestingly, this can be achieved within a natural extension of the SM gauge group, such as a gauged Lμ−Lτ number, without any tree-level coupling between the new vector boson and the sterile neutrino states. Such new leptonic interactions might also be at the origin of the well-known discrepancy associated with the anomalous magnetic moment of the muon.

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Phys. Rev. D 89, 113004– Published 11 June, 2014
  • Received 18 March 2014

© 2014 American Physical Society

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