Darkogenesis: A baryon asymmetry from the dark matter sector

By J. Shelton, K. Zurek. 2010

177 citations recorded by the source corpus.

In standard models of baryogenesis and of dark matter, the mechanisms which generate the densities in both sectors are unrelated to each other. In this paper we explore models which generate the baryon asymmetry through the dark matter sector, simultaneously relating the baryon asymmetry to the dark matter density. In the class of models we explore, a dark matter asymmetry is generated in the hidden sector through a first-order phase transition. Within the hidden sector, it is easy to achieve a sufficiently strong first-order phase transition and large enough CP violation to generate the observed asymmetry. This can happen above or below the electroweak phase transition, but in both cases significantly before the dark matter becomes nonrelativistic. We study examples where the asymmetric dark matter density is then transferred to the baryons both through perturbative and nonperturbative communication mechanisms, and show that in both cases cosmological constraints are satisfied while a sufficient baryon asymmetry can be generated.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/30bddd0219180eb19d0d934b3fd39036f1b7916f

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Citations in the corpus

A facility to search for hidden particles at the CERN SPS: the SHiP physics case (2015, background): “4: In a Hidden Valley with asymmetric dark matter, the dark baryon asymmetry created in a first-order phase transition in a Hidden Valley can be transferred to the Standard Model sector [203].”
Model-independent energy budget of cosmological first-order phase transitions—A sound argument to go beyond the bag model (2020, background): “Yet, dark phase transitions could also play a role in the formation of the baryon asymmetry and lead to an observable gravitational wave signal [12–16].”
Asymmetric WIMP dark matter (2011, background): “In ADM two distinct scenarios are typically considered [15–44].”
Gravitational probes of dark matter physics (2017, background): “This requires annihilation cross sections in the early Universe at least as large as those of a thermal relic [52], and so Λ−1ADM & 5× 10 −5 GeV−1.”
Double-Disk Dark Matter (2013, background): “The idea of asymmetric dark matter has inspired many proposals for how the dark matter and baryon abundances may be related [64–74], and similar considerations could explain the amount of DDDM.”