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- W3135505526 abstract "We study a minimal scenario to realize non-thermal leptogenesis and UV freeze-in of a Standard Model (SM) gauge singlet fermionic dark matter (DM) simultaneously, with inflaton field playing a non-trivial role in their yields. The renormalizable interactions are restricted to the SM fields, two right handed neutrinos (RHN) and inflaton coupling exclusively to the RHNs, while the DM couples to both the SM and the RHNs only via operators of dimension $d>4$. Considering two separate cases of $d={5,6}$, we show that for $d=5$, inflaton decay into RHNs followed by their subsequent decay into SM particles lead to both reheating as well as DM production from the SM bath. This requires a cut-off scale as large as $Lambdasim 10^{17}~rm GeV$ depending on the DM mass. On the other hand, for $d=6$, DM production happens directly from scattering of RHNs (for $Lambdagtrsim 10^{14}~rm GeV$) that results in a very non-trivial evolution of the DM yield. In both these cases, it is possible to explain the observed baryon asymmetry through successful non-thermal leptogenesis via the decay of the RHNs, together with the PLANCK observed relic density of the DM via pure UV freeze-in mechanism. Taking into account both instantaneous as well as non-instantaneous reheating separately, we constrain the parameter space of this minimal scenario from relevant phenomenological requirements including sub-eV scale active neutrino masses and their mixing." @default.
- W3135505526 created "2021-03-15" @default.
- W3135505526 creator A5015106917 @default.
- W3135505526 creator A5046757054 @default.
- W3135505526 creator A5089624314 @default.
- W3135505526 date "2021-08-23" @default.
- W3135505526 modified "2023-09-29" @default.
- W3135505526 title "Nonthermal leptogenesis and UV freeze-in of dark matter: Impact of inflationary reheating" @default.
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