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Cosmological Relaxation from Dark Fermion Production (1909.07706v2)

Published 17 Sep 2019 in hep-ph, astro-ph.CO, and hep-th

Abstract: We consider the cosmological relaxation solution to the electroweak hierarchy problem using the fermion production as a dominant friction force. In our approach, neither super-Planckian field excursions nor a large number of e-folds arise, and scanning over thermal Higgs mass squared is avoided. The produced fermions from the relaxion source through the derivative coupling are SM-singlets, what we call dark fermions, and they can serve as the keV scale warm dark matter candidates.

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