1107.2408 (Ivone F. M. Albuquerque et al.)

Constraints on Enhanced Dark Matter Annihilation from IceCube Results    [PDF]

Ivone F. M. Albuquerque, Leandro J. Beraldo e Silva, Carlos Pérez de los Heros

Excesses on electromagnetic fluxes measured by ATIC, and the PAMELA and Fermi-LAT telescopes can be explained by dark matter annihilation in our Galaxy. However, this requires large boosts on the dark matter annihilation rate. There are many possible enhancement mechanisms, such as the Sommerfeld effect or the existence of dark matter clumps in our halo. If such enhancements are taking place, the dark matter annihilation in the core of the Earth should also be enhanced. Here we use IceCube 40 strings results in order to constrain large boosts. These constraints do not depend on the enhancement mechanism. We also determine the boost range that can be probed by the full IceCube telescope. Dark matter models which require annihilation enhancements of 100 or more and that annihilate significantly into neutrinos are excluded as the explanation for these excesses.

View original: http://arxiv.org/abs/1107.2408