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arXiv · 1910.08068

Baryogenesis from a dark first-order phase transition

Eleanor Hall·Thomas Konstandin·Robert McGehee·Hitoshi Murayama·Géraldine Servant
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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 $\Delta N_\text{eff} = 0.09-0.13$ 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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Eleanor Hall, Thomas Konstandin, Robert McGehee, Hitoshi Murayama, Géraldine Servant. 2019-10-17. Baryogenesis from a dark first-order phase transition. https://doi.org/10.1007/jhep04(2020)042

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