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Cosmological Relaxation from Dark Fermion Production

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arxiv 1909.07706 v2 pith:P3FE6ISI submitted 2019-09-17 hep-ph astro-ph.COhep-th

Kenji Kadota , Ui Min , Minho Son , Fang Ye This is my paper · ORCID
classification hep-phastro-ph.COhep-th
keywords darkcosmologicalfermionfermionsproductionrelaxationapproacharise
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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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