Nonthermal leptogenesis via cosmological gravitational particle production is tested by inflationary gravitational waves

Abstract

We explore the coincidence of scales between cosmic inflation and right-handed neutrinos in seesaw models. We show that inflation models, which will be tested by next-generation CMB experiments, can produce right-handed neutrinos in sufficient abundance to explain the observed baryon asymmetry of the universe. The model can be tested by gravitational wave signatures from cosmic inflation and particle production.

arXiv comment7 pages, 3 figures