  We analyse non-thermal leptogenesis after models of Majoron hilltop
inflation, where the scalar field that provides masses for the right-handed
neutrinos and sneutrinos via its vacuum expectation value acts as the inflaton.
We discuss different realisations of Majoron inflation models with different
hilltop shapes and couplings to the right-handed (s)neutrinos. To study the
non-thermally produced baryon asymmetry in these models, we numerically solve
the relevant Boltzmann equations. In contrast to previous studies, we include
the effects from resonant sneutrino particle production during preheating. We
find that these effects can result in an enhancement of the produced baryon
asymmetry by more than an order of magnitude. This can significantly change the
favoured parameter regions of these models.
