A comparison of the Higgs sectors of the CMSSM and NMSSM for a 126 GeV Higgs boson

Abstract

The recent discovery of a Higgs-like boson at the LHC with a mass of 126 GeV has revived the interest in supersymmetric models, which predicted a Higgs boson mass below 130 GeV long before its discovery. We compare systematically the allowed parameter space in the constrained Minimal Supersymmetric Standard Model (CMSSM) and the Next-to-Minimal Supersymmetric Model (NMSSM) by minimizing the chi^2 function with respect to all known constraints from accelerators and cosmology using GUT scale parameters. For the CMSSM the Higgs boson mass at tree level is below the Z^0 boson mass and large radiative corrections are needed to obtain a Higgs boson mass of 126 GeV, which requires stop squark masses in the multi-TeV range. In contrast, for the NMSSM light stop quarks are allowed, since in the NMSSM at tree level the Higgs boson mass can be above the Z^0 boson mass from mixing with the additional singlet Higgs boson. Predictions for the scalar boson masses are given in both models with emphasis on the unique signatures of the NMSSM, where the heaviest scalar Higgs boson decays in the two lighter scalar Higgs bosons with a significant branching ratio, in which case one should observe double Higgs boson production at the LHC. Such a signal is strongly suppressed in the CMSSM. In addition, since the LSP is higgsino-like, Higgs boson decays into LSPs can be appreciable, thus leading to invisible Higgs decays.

23 pages, 6 figures, this version is accepted by PLB after minor modifications and has updated references. arXiv admin note: text overlap with arXiv:1202.5821 by other authors

References in corpus (12)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Measurement of the B(s) to mu+ mu- branching fraction and search for B0 to mu+ mu- with the CMS Experiment
• Measurement of the $B_s^0\to {\mu }^{+}{\mu }^{-}$ branching fraction and search for $B^0\to {\mu }^{+}{\mu }^{-}$ decays at the LHCb experiment
• On the radiative corrections to the neutral Higgs boson masses in the NMSSM
• The 125 GeV Higgs in the NMSSM in light of LHC results and astrophysics constraints
• Pair production of a 125 GeV Higgs boson in MSSM and NMSSM at the ILC
• Constraints on Supersymmetry from LHC data on SUSY searches and Higgs bosons combined with cosmology and direct dark matter searches
• Peccei-Quinn NMSSM in the light of 125 GeV Higgs
• Invisible decays of the lightest Higgs boson in supersymmetric models
• Scope of Higgs production in association with a bottom quark pair in probing the Higgs sector of the NMSSM at the LHC
• Tools for Dark Matter in Particle and Astroparticle Physics

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• Landscape View at the Edge of a Mystery
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