2017/03/31 by Parsa Ghorbani, Parsa Hossein Ghorbani · 31 citations
Physics and Astronomy · #Astrophysics #Baryogenesis #Baryon asymmetry #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Electron #Electroweak interaction #Higgs boson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Scalar field dark matter #hep-ph #hep-th
paper · pdf · doi:10.1007/jhep08(2017)058
published in Journal of High Energy Physics 2017(8) (Springer Nature) · 15 pages, 4 figures. Fermi-LAT constraint on DM DM to b\bar, tau^+ tau^- in the model was imposed. The range of the mediator mass was shown in a figure. Published in JHEP
openalex publication_date 2017/08/01 · arxiv created 2017/08/23 · arxiv updated 2017/08/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the electroweak baryogenesis in a fermionic dark matter scenario with a (pseudo)scalar being the mediator in the Higgs portal. It is discussed that the electroweak phase transition turns to be first-order after taking into account the role of the (pseudo)scalar in the thermal effective potential in our extended standard model. Imposing the relic density constraint from the WMAP/Planck and the bounds from the direct detection experiments XENON100/LUX, we show that the dark matter scenario with a scalar mediator is hardly capable of explaining the baryogenesis while the same model with a pseudoscalar mediator is able to explain the baryon asymmetry. For the latter, we constrain more the model with Fermi-LAT upper limit on dark matter annihilation into bb and τ + τ −. The allowed dark matter mass that leads to correct relic abundance, renders the electroweak phase transition strongly first-order, and respects the Fermi-LAT limit, will be in the range 110-320 GeV. The exotic and invisible Higgs decay bounds and the mono-jet search limit at the LHC do not affect the viable space of parameters.