September 9, 14:15 in A315   

Kazunori Kohri (Theory Center, IPNS, KEK, Japan)


Dark Matter indirect detection in terms of cosmic rays, gamma-ray, BBN and CMB

Measurements of cosmic-ray electron and positron fluxes by PAMELA and Fermi experiments may have indicated the existence of annihilating dark matter with large annihilation cross section. I will discuss various aspects of annihilating dark matter in cosmology and astrophysics. In particular, I show that BBN and CMB give the severest bounds on the annihilating cross section, which would kill most models even if we consider velocity-dependent cross section, motivated by Sommerfeld or Breit-Wigner enhancement mechanisms.