Direct and Indirect Search for Dark Matter

Direct and indirect searches for dark matter (DM) particles are discussed. The search for a diffuse signal from DM annihilation in the Milky Way is presented using the atmospheric neutrino data from Super-Kamiokande-I, -II, -III. The analysis focuses on the model independent scenario with DM particles annihilating directly into pairs of neutrinos and antineutrinos. No signal contribution is allowed by the Super-Kamiokande data for considered masses of DM particles in the range from 3 GeV to 3 TeV. The upper limit on DM-induced neutrino flux has been obtained as a function of the mass of relic particles. The corresponding limit on the DM self-annihilation cross section 〈σAV 〉 has been evaluated. With this analysis, the existing limit on the value of 〈σAV 〉 has been significantly improved for DM particle masses below 100 GeV as compared to previous constraints based on neutrino interactions data. Presented search can be also related to the concept of the decay of DM particles. The limit on DM decay lifetime τDM has been derived. Finally, studies related to direct DM detection are presented. The results of simulations of neutron background for the Argon Dark Matter (ArDM) experiment are shown.