High Energy Physics - Phenomenology
[Submitted on 19 Sep 2018 (v1), last revised 31 Jan 2019 (this version, v2)]
Title:Phenomenology of the inflation-inspired NMSSM at the electroweak scale
View PDFAbstract: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.
Submission history
From: Sebastian Paßehr [view email][v1] Wed, 19 Sep 2018 19:07:18 UTC (2,532 KB)
[v2] Thu, 31 Jan 2019 14:12:48 UTC (3,238 KB)
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