Gravitational leptogenesis in natural inflation

Alexandros Papageorgiou, Marco Peloso

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

We compute the gravitational leptogenesis generated from the parity-violating gravitational waves sourced by an abelian gauge field coupled to a pseudo-scalar inflation. We show that, once the CMB bound on the tensor-to-scalar ratio is enforced, the lepton asymmetry produced by this mechanism during inflation is too small to account for the observed baryon asymmetry of the universe, irrespectively of the inflaton potential, the strength of its coupling to the gauge field, and the details of reheating.

Original languageEnglish (US)
Article number007
JournalJournal of Cosmology and Astroparticle Physics
Volume2017
Issue number12
DOIs
StatePublished - Dec 5 2017

Bibliographical note

Publisher Copyright:
© 2017 IOP Publishing Ltd and Sissa Medialab.

Keywords

  • Cosmological perturbation theory
  • Inflation
  • Leptogenesis

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