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- Benjamin C. Allanach, C. Balázs, +17 authors J. Lykken
- Computer Physics Communications
- 2009

The Supersymmetry Les Houches Accord (SLHA) [1] provides a universal set of conventions for conveying spectral and decay information for supersymmetry analysis problems in high energy physics. Here, we propose extensions of the conventions of the first SLHA to include various gener-alisations: the minimal supersymmetric standard model with violation of CP,… (More)

- Ulrich Ellwanger, Cyril Hugonie
- Computer Physics Communications
- 2006

We describe the the improved properties of the NMHDECAY program, that is designed to compute Higgs and sparticle masses and Higgs decay widths in the NMSSM. In the version 2.0, Higgs decays into squarks and sleptons are included, accompagnied by a calculation of the squark, gluino and slepton spectrum and tests against constraints from LEP and the Tevatron.… (More)

- C. Hugonie, G. Bélanger, A. Pukhov
- 2008

We explore the parameter space of the Constrained Next-to-Minimal Supersymmet-ric Standard Model with GUT scale boundary conditions (CNMSSM), and find regions where the relic density of the lightest neutralino is compatible with the WMAP measurement. We emphasize differences with the MSSM: cases where annihilation of the LSP occurs via a Higgs resonance at… (More)

We present a code to compute the relic density of dark matter in the Next-to-Minimal Supersymmetric Standard Model (NMSSM). Dominant corrections to the Higgs masses are calculated with nmhdecay as well as theoretical and collider constraints. All neutralino annihilation and coannihilation processes are then computed with an extended version of micrOMEGAs,… (More)

- Ulrich Ellwanger, Cyril Hugonie
- Computer Physics Communications
- 2007

NMSPEC is a Fortran code that computes the sparticle and Higgs masses, as well as Higgs decay widths and couplings in the NMSSM, with soft susy breaking terms specified at M GUT. Exceptions are the soft singlet mass m 2 s and the singlet self coupling κ, that are both determined in terms of the other parameters through the minimization equations of the… (More)

We identify scenarios not ruled out by LEP data in which NMSSM Higgs detection at the LHC will be particularly challenging. We first review the 'no-lose' theorem for Higgs discovery at the LHC that applies if Higgs bosons do not decay to other Higgs bosons — namely, with L = 300 fb −1 , there is always one or more 'standard' Higgs detection channel with at… (More)

We describe the the improved properties of the NMHDECAY program, that is designed to compute Higgs and sparticle masses and Higgs decay widths in the NMSSM. In the version 2.0, Higgs decays into squarks and sleptons are included, accompagnied by a calculation of the squark, gluino and slepton spectrum and tests against constraints from LEP and the Tevatron.… (More)

We study the upper limits on the mass of the lightest and second lightest CP even Higgs bosons in the (M+1)SSM, the MSSM extended by a gauge singlet. The dominant two loop contributions to the effective potential are included, which reduce the Higgs masses by ∼ 10 GeV. Since the coupling R of the lightest Higgs scalar to gauge bosons can be small, we study… (More)

- U Ellwanger, C Hugonie
- 1998

We study the possible signals of the (M+1)SSM with a singlino LSP at LEP2. First we identify regions of the parameter space which are ruled out by negative results of sparticle searches in the context of the MSSM. In the remaining kinematically accessible regions we present total event rates for topologies which require further studies, i.e. estimations of… (More)

We study the phenomenology of a new Minimally-extended Supersymmetric Standard Model (newMSSM) where a gauge singlet superfield is added to the MSSM spectrum. The superpotential of this model contains no dimensionful parameters, thus solving the µ-problem of the MSSM. A global discrete R-symmetry, forbidding the cubic singlet self-interaction, imposed on… (More)