Supersymmetric Dark Matter in Light of WMAP

We re-examine the parameter space of the constrained minimal supersymmetric extension of the Standard Model (CMSSM), taking account of the restricted range of ΩCDMh 2 consistent with the WMAP data. This provides a significantly reduced upper limit on the mass of the lightest supersymmetric particle LSP: mχ <∼ 500 GeV for tanβ <∼ 45 and μ > 0, or tanβ <∼ 30 and μ < 0, thereby improving the prospects for measuring supersymmetry at the LHC, and increasing the likelihood that a 1-TeV linear ee collider would be able to measure the properties of some supersymmetric particles. CERN–TH/2003-051 March 2003