Multi-Field Fermionic Preheating

Details Multi-Field Fermionic Preheating Multi-Field Fermionic Preheating

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cosm.conf..363t&link_type=abstract

COSMO-2000 . Proceedings of the Fourth International Workshop on Particle Physics and the Early Universe . Held 4-8 September 20

Physics

Scientific paper

We present non-perturbative analysis of fermion production during preheating in the presence of multiple scalar fields in an expanding background paying particular attention to the interplay between instant preheating (χ-ψ) and direct fermion preheating (∫-ψ). In the broad resonance regime we find that instant fermion production is sensitive to suppression of the long wavelength χ modes during inflation. Further, the standard scenario of resonant fermionic preheating through inflaton decay can be significantly modified by the χ-ψ coupling, and may even lead to a decrease in the number of fermions produced.

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