Invisible decays of the lightest Higgs boson in supersymmetric models

Abstract

We consider supersymmetric models in which the lightest Higgs scalar can decay invisibly consistent with the constraints on the $126$~GeV state discovered at the CERN LHC. We consider the invisible decay in the minimal supersymmetric standard model~(MSSM), as well its extension containing an additional chiral singlet superfield, the so-called next-to-minimal or nonminimal supersymmetric standard model~(NMSSM).We consider the case of MSSM with both universal as well as nonuniversal gaugino masses at the grand unified scale, and find that only an $E_6$ grand unified model with unnaturally large representation can give rise to sufficiently light neutralinos which can possibly lead to the invisible decay $h^0\to {\tilde{\chi }}_1^0{\tilde{\chi }}_1^0$. Following this, we consider the case of NMSSM in detail, where also we find that it is not possible to have the invisible decay of the lightest Higgs scalar with universal gaugino masses at the grand unified scale. We delineate the regions of the NMSSM parameter space where it is possible to have the lightest Higgs boson to have a mass of about $126$ GeV, and then concentrate on the region where this Higgs can decay into light neutralinos, with the soft gaugino masses $M_1$ and $M_2$ as two independent parameters, unconstrained by grand unification. We also consider, simultaneously, the other important invisible Higgs decay channel in the NMSSM, namely the decay into the lightest CP odd scalars, $h_1\to a_1{a}_1$, which is studied in detail. With the invisible Higgs branching ratio being constrained by the present LHC results, we find that ${\mu }_{eff}<170$~GeV and $M_1<80$~GeV is disfavored in NMSSM for fixed values of the other input parameters. The dependence of our results on the parameters of NMSSM is discussed in detail.

20 pages, 14 figures, to appear in Physical Review D

References in corpus (9)

• 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
• micrOMEGAs2.0: a program to calculate the relic density of dark matter in a generic model
• Non-universal gaugino masses from non-singlet F-terms in non-minimal unified models
• Search for a light pseudoscalar Higgs boson in the dimuon decay channel in pp collisions at sqrt(s) = 7 TeV
• Reinstating the 'no-lose' theorem for NMSSM Higgs discovery at the LHC
• New constraints on a light CP-odd Higgs boson and related NMSSM Ideal Higgs Scenarios
• Many Light Higgs Bosons in the NMSSM
• Partially (in)visible Higgs decays at the LHC

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• A comparison of the Higgs sectors of the CMSSM and NMSSM for a 126 GeV Higgs boson
• The invisible decay of Higgs boson in the context of a thermal and non-thermal relic in MSSM
• Light Higgsino Decays as a Probe of the NMSSM
• Novel Higgs-to-125 GeV Higgs boson decays in the complex NMSSM
• Current bounds and future prospects of light neutralino dark matter in NMSSM
• Electroweakino searches at the HL-LHC in the baryon number violating MSSM
• Invisible decays of the heavier Higgs boson in the minimal supersymmetric standard model
• Invisible decays of low mass Higgs bosons in supersymmetric models
• Production and decays of a light ${\varphi }^0$ in the LRTH model under the LHC Higgs data
• Current status of the light neutralino thermal dark matter in the phenomenological MSSM
• Measuring the trilinear neutral Higgs boson couplings in the minimal supersymmetric standard model at $e^{+}{e}^{-}$ colliders in the light of the discovery of a Higgs boson
• Constraining dark matter in the LRTH model with latest LHC, XENON100 and LUX data