Cold dark matter detection in SUSY models at large tan beta

摘要

We study the direct detection rate for SUSY cold dark matter (CDM) predicted by the minimal supersymmetric standard model with universal boundary conditions and large values fur tan beta. The relic abundance of the lightest supersymmetric particle (LSP), assumed to be approximately a bino, is obtained by including its coannihilations with the next-to-lightest supersymmetric particle (NLSP), which is the lightest s-tau. The cosmological constraint on this quantity severely limits the allowed SUSY parameter space, especially 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 parameter space, which yields detectable rates in the currently planned experiments. (C) 2001 Published by Elsevier Science B.V. [References: 92]