Update on the direct detection of supersymmetric dark matter

John Ellis, Keith A. Olive, Yudi Santoso, and Vassilis C. Spanos
Phys. Rev. D 71, 095007 – Published 12 May 2005

Abstract

We compare updated predictions for the elastic scattering of supersymmetric neutralino dark matter with the improved experimental upper limit recently published by Cryogenic Dark Matter Search (CDMS) II. We take into account the possibility that the π-nucleon Σ term may be somewhat larger than was previously considered plausible, as may be supported by the masses of exotic baryons reported recently. We also incorporate the new central value of mt, which affects indirectly constraints on the supersymmetric parameter space, for example, via calculations of the relic density. Even if a large value of Σ is assumed, the CDMS II data currently exclude only small parts of the parameter space in the constrained minimal standard model (CMSSM) with universal soft supersymmetry-breaking Higgs, squark, and slepton masses. None of the previously proposed CMSSM benchmark scenarios is excluded for any value of Σ, and the CDMS II data do not impinge on the domains of the CMSSM parameter space favored at the 90% confidence level in a recent likelihood analysis. However, some models with nonuniversal Higgs, squark, and slepton masses and neutralino masses 700GeV are excluded by the CDMS II data.

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  • Received 9 February 2005

DOI:https://doi.org/10.1103/PhysRevD.71.095007

©2005 American Physical Society

Authors & Affiliations

John Ellis1, Keith A. Olive2, Yudi Santoso3, and Vassilis C. Spanos2

  • 1TH Division, CERN, Geneva, Switzerland
  • 2William I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455, USA
  • 3Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada and Perimeter Institute of Theoretical Physics, Waterloo, Ontario N2L 2Y5, Canada

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Vol. 71, Iss. 9 — 1 May 2005

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