Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-05-13
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 4 figures. Talk given at the XLIst Rencontres de Moriond, Electroweak Interactions And Unified Theories, March 11 - 1
Scientific paper
It is known that the cosmological baryon density (Omega(b)) and dark matter density (Omega(dm)) have strikingly similar values. However, in most theories of the early Universe, each density is explained by separate dynamics and consequently there is no compelling reason for this observation. In this note, I briefly review a model in which the dark matter possesses a particle-antiparticle asymmetry. This asymmetry determines both the baryon asymmetry and strongly affects the dark matter density, thus naturally linking Omega(b) and Omega(dm). In these models it is shown that sneutrinos can play the role of such dark matter.
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