Cold dark matter detection in SUSY models at large tan beta

We study the direct detection rate for SUSY cold dark matter (CDM) predicte d by the minimal supersymmetric standard model with universal boundary cond itions and large values fur tan beta. The relic abundance of the lightest s upersymmetric particle (LSP), assumed to be approximately a bino, is obtain ed by including its coannihilations with the next-to-lightest supersymmetri c particle (NLSP), which is the lightest s-tau. The cosmological constraint on this quantity severely limits the allowed SUSY parameter space, especia lly in the case the CP-even Higgs has mass of around 114 GeV. We find that fur large tan beta it is possible to find a subsection of the allowed param eter space, which yields detectable rates in the currently planned experime nts. (C) 2001 Published by Elsevier Science B.V.