  We present the supersymmetric extension of the unified model for inflation
and Dark Matter studied in Ref. arXiv:1811.02302. The scenario is based on the
incomplete decay of the inflaton field into right-handed (s)neutrino pairs. By
imposing a discrete interchange symmetry on the inflaton and the right-handed
(s)neutrinos, one can ensure the stability of the inflaton field at the global
minimum today, while still allowing it to partially decay and reheat the
Universe after inflation. Compatibility of inflationary predictions, BBN bounds
and obtaining the right DM abundance for the inflaton Dark Matter candidate
typically requires large values of its coupling to the neutrino sector, and we
use supersymmetry to protect the inflaton from potentially dangerous large
radiative corrections which may spoil the required flatness of its potential.
In addition, the inflaton will decay now predominatly into sneutrinos during
reheating, which in turn give rise both to the thermal bath made of Standard
Model particles, and inflaton particles. We have performed a through analyses
of the reheating process following the evolution of all the partners involved,
identifying the different regimes in the parameter space for the final Dark
Matter candidate. This as usual can be a WIMP-like inflaton particle or an
oscillating condensate, but we find a novel regime for a FIMP-like candidate.
