Phenomenology of the inflation-inspired NMSSM at the electroweak scale

Abstract : The concept of Higgs inflation can be elegantly incorporated in the Next-to-Minimal Supersymmetric Standard Model (NMSSM). A linear combination of the two Higgs-doublet fields plays the role of the inflaton which is non-minimally coupled to gravity. This non-minimal coupling appears in the low-energy effective superpotential and changes the phenomenology at the electroweak scale. While the field content of the inflation-inspired model is the same as in the NMSSM, there is another contribution to the  $\mu $  term in addition to the vacuum expectation value of the singlet. We explore this extended parameter space and point out scenarios with phenomenological differences compared to the pure NMSSM. A special focus is set on the electroweak vacuum stability and the parameter dependence of the Higgs and neutralino sectors. We highlight regions which yield a SM-like $125\,\hbox {GeV}$ Higgs boson compatible with the experimental observations and are in accordance with the limits from searches for additional Higgs bosons. Finally, we study the impact of the non-minimal coupling to gravity on the Higgs mixing and in turn on the decays of the Higgs bosons in this model.
Type de document :
Article dans une revue
Eur.Phys.J.C, 2019, 79 (1), pp.75. 〈10.1140/epjc/s10052-019-6561-6〉
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Soumis le : mardi 9 octobre 2018 - 13:53:15
Dernière modification le : lundi 18 février 2019 - 23:48:04

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Wolfgang Gregor Hollik, Stefan Liebler, Gudrid Moortgat-Pick, Sebastian Paßehr, Georg Weiglein. Phenomenology of the inflation-inspired NMSSM at the electroweak scale. Eur.Phys.J.C, 2019, 79 (1), pp.75. 〈10.1140/epjc/s10052-019-6561-6〉. 〈hal-01891244〉



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