Open AccessElectroweak baryogenesis, large Yukawas and dark matter
Author(s) -
Alessio Provenza,
M. Quirós,
Piero Ullio
Publication year - 2005
Publication title -
journal of high energy physics
Language(s) - English
Resource type - Journals
eISSN - 1126-6708
pISSN - 1029-8479
DOI - 10.1088/1126-6708/2005/10/048
Subject(s) - physics , baryogenesis , electroweak interaction , dark matter , cmb cold spot , particle physics , weakly interacting massive particles , standard model (mathematical formulation) , fermion , parameter space , yukawa potential , minimal supersymmetric standard model , physics beyond the standard model , scalar field dark matter , dark energy , supersymmetry , astrophysics , cosmology , cosmic microwave background , quantum mechanics , statistics , mathematics , archaeology , anisotropy , gauge (firearms) , history
It has been recently shown that the electroweak baryogenesis mechanism isfeasible in Standard Model extensions containing extra fermions with largeYukawa couplings. We show here that the lightest of these fermionic fields cannaturally be a good candidate for cold dark matter. We find regions in theparameter space where the thermal relic abundance of this particle iscompatible with the dark matter density of the Universe as determined by theWMAP experiment. We study direct and indirect dark matter detection for thismodel and compare with current experimental limits and prospects for upcomingexperiments. We find, contrary to the standard lore, that indirect detectionsearches are more promising than direct detection ones, and they alreadyexclude a portion of the parameter space.Comment: 26 pages, 15 figure
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