Higgsino Cold Dark Matter Motivated by Collider Data

Motivated by a supersymmetric interpretation of the CDF $\mathrm{ee}\gamma \gamma +E_T$ event and the reported $Z\to b\overline{b}$ excess at LEP, we analyze the implied Higgsino-like lightest supersymmetric partner as a cold dark matter candidate. We examine constraints and calculate its relic density, obtaining $0.05<\mathrm{}\Omega h^2<1\mathrm{}$. Thus it is a viable cold dark matter candidate, and we discuss its favorable prospects for laboratory detection.