Signatures of dark matter annihilation in the light of PAMELA/ATIC anomaly

Abstract

Recent measurements of cosmic-ray electron and positron fluxes by PAMELA and ATIC experiments may indicate the existence of annihilating dark matter with large annihilation cross section. We discuss its possible relation to other astrophysical/cosmological observations : gamma-rays, neutrinos, and big-bang nucleosynthesis. It is shown that they give stringent constraints on some annihilating dark matter models.

Comments: Talk given at Dark2009, to appear in the proceedings; 8 pages, 5 figures