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We study phenomenological aspects of the bino-wino co-annihilation scenarioin high-scale supersymmetry breaking models. High-scale SUSY breaking scenariosare considered to be promising possibility after the discovery of the Higgsboson with a mass around 126 GeV. In this paper, we discuss the bino lightestsupersymmetric particle (LSP) accompanied by the at most around 30 GeV heavierwino. With the suitable mass splitting between the bino and the wino, the binoLSP has the correct relic abundance of dark matter. For the smaller masssplitting, the late-time decay of the gravitino can provide the correctabundance of the bino dark matter. It is extremely challenging to find signalsfrom the bino dark matter in direct and indirect detections. By utilizingmulti-jets plus missing transverse momentum events at the LHC, we canconstraint the gluino mass and thus probe the bino-wino co-annihilationscenario indirectly. The collider experiment, however, can not search the binodark matter directly. In this paper, we suggest the direct probe of the binodark matter. We show that the bino dark matter leaves imprints on thesmall-scale matter power spectrum when the bino dark matter is produced by thedecay of the gravitino. The non-thermal bino dark matter behaves as mixed(cold+warm) dark matter.

Mixed (Cold+Warm) Dark Matter in the Bino-Wino co-annihilation scenario