Anisotropy probes of dark matter annihilation

by Prof. Shin’ichiro Ando (GRAPPA - UvA)

Wednesday 22 Feb 2017, 13:00 → 14:00 Europe/Brussels

E/3rd floor-E.349 - Seminar room (E.349) (Marc de Hemptinne (chemin du Cyclotron, 2, Louvain-la-Neuve))

With Fermi-LAT launched in 2008, we have huge amount of gamma-ray data in GeV energy range from all sky. The latest measurement of the diffuse gamma-ray background can place competitive upper limits on annihilation cross section of dark matter particles (predicted for popular WIMP scenarios), by using the energy spectrum. I will discuss that by using anisotropy of the gamma-ray background, one can fully utilise information contained in angular distribution of these photons to further the sensitivity to dark matter annihilation. In addition, there is a proposal to take cross correlation between the gamma-ray background and distribution of gravitational tracers such as galaxies or weak gravitational lensing to potentially reduce astrophysical contributions. I will discuss all these possibilities including theoretical ideas and current status of observational constraints. I will also discuss constraints on astrophysical sources by the same methods, and implications for high-energy astrophysical neutrinos detected with IceCube.

Transparents Ando_-_Anisotropy_probes_of_dark_matter_annihilation.pdf