2008/01/28 by A. Djouadi, M. Drees, Manuel Drees +16 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Dark Matter and Cosmic Phenomena #Higgs boson #Large Hadron Collider #Minimal Supersymmetric Standard Model #Neutralino #Particle physics #Particle physics theoretical and experimental studies #Physics #Supersymmetry #hep-ph
paper · pdf · doi:10.1088/1126-6708/2008/07/002
published as JHEP 0807:002,2008 · 25 pages, 2 figures, 2 tables
arxiv created 2008/01/28 · openalex publication_date 2008/07/01 · arxiv updated 2014/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/08
We discuss constrained and semi--constrained versions of the next--to--minimal supersymmetric extension of the Standard Model (NMSSM) in which a singlet Higgs superfield is added to the two doublet superfields that are present in the minimal extension (MSSM). This leads to a richer Higgs and neutralino spectrum and allows for many interesting phenomena that are not present in the MSSM. In particular, light Higgs particles are still allowed by current constraints and could appear as decay products of the heavier Higgs states, rendering their search rather difficult at the LHC. We propose benchmark scenarios which address the new phenomenological features, consistent with present constraints from colliders and with the dark matter relic density, and with (semi--)universal soft terms at the GUT scale. We present the corresponding spectra for the Higgs particles, their couplings to gauge bosons and fermions and their most important decay branching ratios. A brief survey of the search strategies for these states at the LHC is given.