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 $125\,$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.
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Contributeur : Inspire Hep <>
Soumis le : mardi 9 octobre 2018 - 13:53:15
Dernière modification le : mercredi 12 décembre 2018 - 01:36:04

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Wolfgang Hollik, Stefan Liebler, Gudrid Moortgat-Pick, Sebastian Paßehr, Georg Weiglein. Phenomenology of the inflation-inspired NMSSM at the electroweak scale. 2018. 〈hal-01891244〉



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