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Baryogenesis from a dark first-order phase transition

Hall, Eleanor·Konstandin, Thomas·McGehee, Robert·Murayama, Hitoshi·Servant, Géraldine
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Abstract

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 ΔN eff = 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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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDSBeyond Standard ModelCosmology of Theories beyond the SM

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Hall, Eleanor, Konstandin, Thomas, McGehee, Robert, Murayama, Hitoshi, Servant, Géraldine. 2020-04-07. Baryogenesis from a dark first-order phase transition. https://doi.org/10.1007/jhep04(2020)042

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