Observational implications of mattergenesis during inflation

Mar Bastero-Gil*, Arjun Berera, Rudnei O. Ramos, João G. Rosa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number053
JournalJournal of Cosmology and Astroparticle Physics (JCAP)
Issue number10
Publication statusPublished - 1 Oct 2014


  • baryon asymmetry
  • ination
  • particle physics - cosmology connection
  • supersymmetry and cosmology

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