Status of dark matter indirect searches in the PAMELA and Fermi era

por Dr. Aldo Morselli (INFN Roma Tor Vergata)

jueves 29 ene. 2009 12:00 → 13:00 Europe/Madrid

Sala Seminarios IFIC (Edf. Institutos de Investigación)

The detection of gamma-rays, antiprotons and positrons due to pair annihilation of dark matter particles in the Milky Way halo is a viable indirect technique to search for signatures of supersymmetric dark matter where the major challenge is the discrimination of the signal from the background generated by standard production mechanisms. The new PAMELA antiproton data are consistent with the standard secondary production and this allows us to constrain exotic contribution to the spectrum due to neutralino annihilations. Instead, the PAMELA positron fraction data exhibit an excess that cannot be explained by secondary production. PPB-BETS and ATIC reported a feature in electron spectrum at a few hundred GeV. We will discuss the possible conventional and exotic explanation and in general the status of indirect dark matter searches and a perspective for PAMELA and Fermi (formerly GLAST) gamma-ray space telescope experiments.