version française rss feed
HAL : hal-00258401, version 1

Fiche détaillée  Récupérer au format
Journal of High Energy Physics 07 (2008) 002
Benchmark scenarios for the NMSSM
A. Djouadi1, 2, 3, M. Drees3, U. Ellwanger1, R. Godbole4, Cyril Hugonie5, S. F. King2, S. Lehti6, S. Moretti1, 2, A. Nikitenko7, I. Rottlaender3, M. Schumacher8, A. Teixeira1

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.
1 :  LPT - Laboratoire de Physique Théorique d'Orsay
2 :  School of Physics and Astronomy
3 :  Physikalisches Institut
4 :  CHEP - Centre for High Energy Physics
5 :  LPTA - Laboratoire de Physique Théorique et Astroparticules
6 :  Helsinki Institute of Physics
7 :  Physics Department
8 :  Fachbereich Physik [Siegen]
Physique/Physique des Hautes Energies - Phénoménologie
Supersymmetry Phenomenology – Supersymmetric Standard Model
Lien vers le texte intégral :