2011/08/31 by John McDonald, J. McDonald · 1 citation
Physics and Astronomy · #Astrophysics #Asymmetry #Baryogenesis #Baryon #Baryon asymmetry #Baryonic dark matter #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Electroweak interaction #Hypercharge #Lepton #Light dark matter #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Scalar field dark matter #WIMP #Warm dark matter #astro-ph.CO #hep-ph
paper · pdf · doi:10.1103/physrevd.84.103514
12 pages, 5 figures, overdue correction of typos, version published PRD
openalex publication_date 2011/11/10 · arxiv created 2015/03/05 · arxiv updated 2015/03/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The observed density of dark matter is of the magnitude expected for a thermal relic weakly-interacting massive particle (WIMP). In addition, the observed baryon density is within an order of magnitude of the dark matter density. This suggests that the baryon density is physically related to a typical thermal relic WIMP dark matter density. We present a model which simultaneously generates thermal relic WIMP-like densities for both baryons and dark matter by modifying a large initial baryon asymmetry. Dark matter is due to O(100) GeV gauge singlet scalars produced in the annihilation of the O(TeV) colored scalars which are responsible for the final thermal WIMP-like baryon asymmetry. The requirement of no baryon washout implies that there are two gauge singlet scalars. The low-temperature transfer of the asymmetry to conventional baryons can be understood if the long-lived O(TeV) colored scalars have large hypercharge, |Y|>4/3. Production of such scalars at the LHC would be a clear signature of the model.