Recoil detection of the lightest neutralino in MSSM singlet extensions

Vernon Barger, Paul Langacker, Ian Lewis, Mat McCaskey, Gabe Shaughnessy, Brian Yencho

Research output: Contribution to journalArticle

54 Scopus citations

Abstract

We investigate the correlated predictions of singlet extended MSSM models for direct detection and the cosmological relic density of the lightest neutralino. To illustrate the general effects of the singlet, we take heavy sleptons and squarks. We apply CERN LEP, (g-2)μ, and perturbativity constraints. We find that the WMAP upper bound on the cold dark matter density limits much of the parameter space to regions where the lightest neutralino can be discovered in recoil experiments. The results for the next-to-minimal supersymmetric standard model and U(1)′-extended minimal supersymmetric standard model are typically similar to the MSSM since their light neutralinos have similar compositions and masses. In the nearly minimal supersymmetric standard model the neutralino is often very light and its recoil detection is within the reach of the CDMS II experiment. In general, most points in the parameter spaces of the singlet models we consider are accessible to the WARP experiment.

Original languageEnglish (US)
Article number115002
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume75
Issue number11
DOIs
StatePublished - Jun 1 2007

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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