Warm baryogenesis
  We show that a baryon asymmetry can be generated by dissipative effects
during warm inflation via a supersymmetric two-stage mechanism, where the
inflaton is coupled to heavy mediator fields that then decay into light species
through B- and CP-violating interactions. In contrast with thermal GUT
baryogenesis models, the temperature during inflation is always below the heavy
mass threshold, simultaneously suppressing thermal and quantum corrections to
the inflaton potential and the production of dangerous GUT relics. This
naturally gives a small baryon asymmetry close to the observed value, although
parametrically larger values may be diluted after inflation along with any
gravitino overabundance. Furthermore, this process yields baryon isocurvature
perturbations within the range of future experiments, making this an attractive
and testable model of GUT baryogenesis.
