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arXiv · 1909.07706

Cosmological Relaxation from Dark Fermion Production

Kenji Kadota·Ui Min·Minho Son·Fang Ye
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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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Kenji Kadota, Ui Min, Minho Son, Fang Ye. 2019-09-17. Cosmological Relaxation from Dark Fermion Production. https://doi.org/10.1007/jhep02(2020)135

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