Particle and Astroparticle Physics Seminar

IceCube and Fermi-LAT: Complementary Limits on Heavy Dark Matter

Nicholas Rodd

MIT

Difficulties in explaining the origin of the high energy neutrinos observed by IceCube using traditional astroparticle physics have motivated ideas this flux could in part be due to the decay of PeV scale dark matter. In such scenarios, the decay is necessarily associated with the production of gamma rays at much lower energies that can be observed by Fermi-LAT. This is true even for decays directly to neutrinos due to electroweak corrections. This fact can be exploited to set limits on PeV scale dark matter, which I will present in this talk, using 423 weeks of Fermi data. In particular, I will show that certain scenarios may already be in tension with Fermi, and in any many cases the limits derived are complementary with those obtainable from IceCube.