Cosmological Higgs-Axion Interplay for a Naturally Small Electroweak Scale

J. R. Espinosa, C. Grojean, G. Panico, A. Pomarol, O. Pujolàs, G. Servant

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79 Citations (Scopus)


© 2015 American Physical Society. Recently, a new mechanism to generate a naturally small electroweak scale has been proposed. It exploits the coupling of the Higgs boson to an axionlike field and a long era in the early Universe where the axion unchains a dynamical screening of the Higgs mass. We present a new realization of this idea with the new feature that it leaves no sign of new physics at the electroweak scale, and up to a rather large scale, 109 GeV, except for two very light and weakly coupled axionlike states. One of the scalars can be a viable dark matter candidate. Such a cosmological Higgs-axion interplay could be tested with a number of experimental strategies.
Original languageEnglish
Article number251803
JournalPhysical Review Letters
Issue number25
Publication statusPublished - 16 Dec 2015


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