Dark Matter searches with astrophysical data
Mercredi 30/01/2013, 14:15
Salle Claude Itzykson, Bât. 774, Orme des Merisiers
A non-gravitational detection of dark matter would be a crucial progress to understand its nature. If dark matter is formed by Weakly Interacting Massive Particles (WIMPs) this could be accomplished in different ways, notably through dark matter searches at colliders, direct searches in underground experiments and indirect searches using astrophysical observations. The latter technique is based on the detection of the products of WIMPs annihilations or decays. In particular, high-energy photons are produced in WIMPs annihilations and less energetic secondary emissions are induced by the interactions of the annihilation products with the intergalactic medium. This leads to a multi-wavelength photon spectrum ranging from radio wavelengths to gamma-rays.
I will discuss the implications of present astrophysical data for dark matter searches, in particular focusing on observations from the Fermi-LAT satellite and radio telescopes.
I will then discuss the effects of the WIMPs accretion into celestial bodies and I will derive constraints on the WIMPs parameter space.
Contact : ccaprini