$\nu$-Inflaton Dark Matter
  We present a unified model where the same scalar field can drive inflation
and account for the present dark matter abundance. This scenario is based on
the incomplete decay of the inflaton field into right-handed neutrino pairs,
which is accomplished by imposing a discrete interchange symmetry on the
inflaton and on two of the right-handed neutrinos. We show that this can lead
to a successful reheating of the Universe after inflation, while leaving a
stable inflaton remnant at late times. This remnant may be in the form of
WIMP-like inflaton particles or of an oscillating inflaton condensate,
depending on whether or not the latter evaporates and reaches thermal
equilibrium with the cosmic plasma. We further show that this scenario is
compatible with generating light neutrino masses and mixings through the seesaw
mechanism, predicting at least one massless neutrino, and also the observed
baryon asymmetry via thermal leptogenesis.
