Sensitivity on Dark Sector through the Neutralino Production and Muon Pairs Decay at Muon Collider

Muon colliders offer a great opportunity to discover and prove new physics beyond the Standard Model. Dark SUSY models, for instance, couple the supersymmetric particles with the dark sector, and long-lived dark matter particles are expected to decay with a clear signature, i.e. very collimated muon pairs. The study of decay channels with dark matter particles coming from neutralinos produced in muon collisions at 3 TeV centre-of-mass energy is presented for the time being without the effects of the machine Beam-Induced Background. Preliminary results of the muon reconstruction performances, obtained by analyzing the final state, characterized by muon pairs, are shown for a possible range of neutralino mass.