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Baryogenesis from a dark first-order phase transition

  • Author(s): Hall, Eleanor
  • Konstandin, Thomas
  • McGehee, Robert
  • Murayama, Hitoshi
  • Servant, Géraldine
  • et al.
Abstract

© 2020, The Author(s). We present a very minimal model for baryogenesis by a dark first-order phase transition. It employs a new dark SU(2)D gauge group with two doublet Higgs bosons, two lepton doublets, and two singlets. The singlets act as a neutrino portal that transfer the generated asymmetry to the Standard Model. The model predicts ∆Neff = 0.09–0.13 detectable by future experiments as well as possible signals from exotic decays of the Higgs and Z bosons and stochastic gravitational waves.

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