Abstract
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 language | English (US) |
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Article number | 018 |
Journal | Journal of Cosmology and Astroparticle Physics |
Volume | 2019 |
Issue number | 10 |
DOIs | |
State | Published - Oct 7 2019 |
Keywords
- axions
- cosmological perturbation theory
- ination
- primordial gravitational waves (theory)
ASJC Scopus subject areas
- Astronomy and Astrophysics