Cosmic asymmetry, neutrinos and the sun☆

Abstract We consider the effects a cosmological asymmetry would have on various consequences of cold dark matter. To be specific, we suppose that stable Dirac neutrinos exist with masses of a few GeV. We then consider the contribution these neutrinos make towards a closure density for the universe and the possibility of capturing neutrinos in the sun and observing their annihilation products. We concentrate on the role asymmetry plays in altering previous discussions. The arguments concerning the sun are only relevant if the neutrino mass is greater than the “evaporation” mass, m ev . We evaluate m ev = 3.3 GeV using a detailed balance technique.

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