Gravitational waves from fermion production during axion inflation

Peter Adshead, Lauren Pearce, Marco Peloso, Michael A. Roberts, Lorenzo Sorbo

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


We present analytic results for the gravitational wave power spectrum induced in models where the inflaton is coupled to a fermionic pseudocurrent. We show that although such a coupling creates helically polarized fermions, the polarized component of the resulting gravitational waves is parametrically suppressed with respect to the non-polarized one. We also show that the amplitude of the gravitational wave signal associated to this production cannot exceed that generated by the standard mechanism of amplification of vacuum fluctuations.

Original languageEnglish (US)
Article number018
JournalJournal of Cosmology and Astroparticle Physics
Issue number10
StatePublished - Oct 7 2019

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics


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