Nonthermal leptogenesis and UV freeze-in of dark matter: Impact of inflationary reheating

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