Observational implications of mattergenesis during inflation
  The observed baryon asymmetry, as well as potentially an asymmetry in the
dark matter sector, can be produced through dissipative particle production
during inflation. A distinctive feature of this mechanism is the generation of
matter isocurvature perturbations that are fully (anti-)correlated with the
dominant adiabatic curvature perturbations. We show that chaotic warm inflation
models yield anti-correlated isocurvature modes that may partially or even
completely screen the contribution of primordial gravity waves to the CMB
temperature power spectrum. The tensor-to-scalar ratio inferred from the latter
may thus be parametrically smaller than the one deduced from B-mode
polarization maps, which is particularly relevant in the light of the recently
announced results of the BICEP2 experiment.
