Phenomenology of WIMPy baryogenesis models
Abstract
A possible connection between the abundances of baryonic and dark matter (DM) has been explored so far mostly in the context of the socalled asymmetric DM. Recently, a very different mechanism, dubbed ``WIMPy baryogenesis'', has been proposed to relate the baryon asymmetry to DM annihilation. The DM candidate is a weakly interacting massive particle (WIMP), and the usual WIMP scenario is slightly extended to accommodate baryogenesis, which is accomplished around the time of DM freezeout. We construct an effective field theory that encompasses a quite general class of models which implement the WIMPy baryogenesis. Under some reasonable, simplifying assumptions, we show that a good portion of the parameter space is allowed for these models, after experimental constraints are taken into account. Bounds from the LHC require that the WIMP be heavier than 400 GeV.
 Publication:

Journal of Cosmology and Astroparticle Physics
 Pub Date:
 January 2013
 DOI:
 10.1088/14757516/2013/01/034
 arXiv:
 arXiv:1210.0094
 Bibcode:
 2013JCAP...01..034B
 Keywords:

 High Energy Physics  Phenomenology;
 Astrophysics  High Energy Astrophysical Phenomena
 EPrint:
 30 pages, 13 figures. Final version: added some remarks on neutronantineutron oscillation and some references