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.
Cosmological Higgs-Axion Interplay for a Naturally Small Electroweak Scale / J. R. Espinosa ; C. Grojean ; Giuliano Panico; A. Pomarol ; O. Pujolàs ; G. Servant. - In: PHYSICAL REVIEW LETTERS. - ISSN 1079-7114. - ELETTRONICO. - 115:(2015), pp. 0-0. [10.1103/PhysRevLett.115.251803]
Cosmological Higgs-Axion Interplay for a Naturally Small Electroweak Scale
Giuliano Panico;
2015
Abstract
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.
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