Neutralinos as dark matter in the minimal supergravity model

A new approach to the phenomenological study of the minimal supergravity model is presented in which the model is effectively parametrized in terms of five low energy observables. Radiative corrections due to large Yukawa couplings and particle-sparticle mass splitting are included into the analysis and found to have important effects, in particular on the degree of fine tuning in the model. In this framework the neutralino relic abundance has been calculated and the cosmologically interesting range of parameters determined (after imposing all the presently available accelerator limits).