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We present brief synopses of supersymmetric models where either theneutralino composition or its mass is adjusted so that thermal relicneutralinos from the Big Bang saturate the measured abundance of cold darkmatter in the universe. We first review minimal supergravity (mSUGRA), and thenexamine its various one-parameter extensions where we relax the assumeduniversality of the soft supersymmetry breaking parameters. Our goal is tocorrelate relic-density-allowed parameter choices with expected phenomena indirect, indirect and collider dark matter search experiments. For everynon-universal model, we first provide plots to facilitate the selection of``dark-matter allowed'' parameter space points, and then present salientfeatures of each model with respect to searches at Tevatron, LHC and ILC andalso direct and indirect dark matter searches. We present benchmark scenariosthat allow one to compare and contrast the non-universal models with oneanother and with the paradigm mSUGRA framework. We show that many implicationsabout sparticle properties and collider signals drawn from the analysis of therelic density constraint within mSUGRA do not carry over to simpleone-parameter extensions of the mSUGRA framework. We find that in manyrelic-density-consistent models, there is one (or more) detectable edge in theinvariant mass distribution of same-flavour, opposite sign dileptons in SUSYcascade decay events at the LHC. Finally, we scan the parameter space of thesevarious models, requiring consistency with the LEP2 constraint on the charginomass, and with the observed relic density, and examine prospects for direct andindirect dark matter detection. We find that in a large number of cases themechanism that causes the early universe neutralino annihilation rate to belarge (so as to produce the measured relic density) also enhances the directdetection rate, and often also the rates for indirect detection of neutralinodark matter.

Collider signals and neutralino dark matter detection in relic-density-consistent models without universality