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- W2048906695 abstract "We show how thermal leptogenesis induced by the CP-violating decay of a right-handed neutrino (RHN) can be compatible to the assumption of quintessential kination, i.e., to a cosmological background model where the energy density of the early Universe is assumed to be dominated by the kinetic term of a quintessence field during some epoch of its evolution. The phenomenology depends on the temperature Tr above which kination dominates over radiation. For instance, when kination stops to dominate when M/100 Tr M (where M is the RHN mass) the efficiency of the process η, defined as the ratio between the produced lepton asymmetry and the amount of CP violation in the RHN decay, can be even larger than in the standard scenario of radiation domination. On the other hand, a super-weak wash-out regime is obtained (η < 1) for Tr < < M/100. In this latter situation the lower bound Tr 5 MeV ×(M/TeV)(0.05eV/m) can be found, where m is the effective neutrino mass scale." @default.
- W2048906695 created "2016-06-24" @default.
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- W2048906695 date "2008-07-01" @default.
- W2048906695 modified "2023-10-18" @default.
- W2048906695 title "Quintessential kination and leptogenesis" @default.
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- W2048906695 doi "https://doi.org/10.1088/1742-6596/120/2/022008" @default.
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