Electroweak Baryogenesis, Large Yukawas and Dark Matter

Details Electroweak Baryogenesis, Large Yukawas and Dark Matter Electroweak Baryogenesis, Large Yukawas and Dark Matter

2005-07-28

arxiv.org/abs/hep-ph/0507325v1

JHEP 0510 (2005) 048

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pages, 15 figures

Scientific paper

10.1088/1126-6708/2005/10/048

It has been recently shown that the electroweak baryogenesis mechanism is feasible in Standard Model extensions containing extra fermions with large Yukawa couplings. We show here that the lightest of these fermionic fields can naturally be a good candidate for cold dark matter. We find regions in the parameter space where the thermal relic abundance of this particle is compatible with the dark matter density of the Universe as determined by the WMAP experiment. We study direct and indirect dark matter detection for this model and compare with current experimental limits and prospects for upcoming experiments. We find, contrary to the standard lore, that indirect detection searches are more promising than direct detection ones, and they already exclude a portion of the parameter space.

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