Z decay and the search for dark matter

The recent measurements of {ital Z} decay at the SLAC Linear Collider and the CERN LEP, when combined with nonaccelerator experiments, rule out various weakly-interacting-massive-particle (WIMP) candidates for dark matter including Dirac neutrinos, and strongly constrain all others.

Abstract

The recent measurements of Z decay at the SLAC Linear Collider and the CERN ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$ collider LEP, when combined with nonaccelerator experiments, rule out various weakly-interacting-massive-particle (WIMP) candidates for dark matter including Dirac neutrinos, and strongly constrain all others. I discuss this, along with other implications of current Z measurements for the discovery of WIMP's in the laboratory.