Dark matter and Colliders searches in the MSSM
Résumé
We study the complementarity between dark matter searches (direct detection, neutrino, gamma and positrons indirect detection) and accelerators facilities (the CERN LHC, and a $\sqrt{s}= 1$ TeV $e^+e^-$ linear collider) in the framework of the Minimal Supersymmetric Standard Model (MSSM). We show how non--universality in the scalar and gaugino sector can affect the experimental prospectives. The future experiments will cover a large part of the parameter space of the low energy MSSM respecting WMAP constraints on the dark matter density of neutralino, but there still exist some regions beyond reach of detection for some extreme (fine tuned) values of the parameters. Whereas the Focus Point (FP) region characterized by heavy scalars will be more easily probed by dark matter searches projects due to the nature of the neutralino, the region with heavy gaugino and light sfermions will be more accessible by collider experiments. Deeper informations on both supersymmetry and astrophysics hypothesis can thus be obtained by correlation of the different signals or absence of signal.