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WIMPy leptogenesis with absorptive final state interactions
Phys. Rev. D 89, 055016 – Published 18 March, 2014
DOI: https://doi.org/10.1103/PhysRevD.89.055016
Abstract
We consider a class of leptogenesis models in which the lepton asymmetry arises from dark matter annihilation processes which violate and lepton number. Importantly, a necessary one-loop contribution to the annihilation matrix element arises from absorptive final-state interactions. We elucidate the relationship between this one-loop contribution and the -violating phase. As we show, the branching fraction for dark matter annihilation to leptons may be small in these models, while still generating the necessary asymmetry.
Article Text
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