Filippo Sala (DESY)
Dark Matter from Dark Sectors: self interactions and beyond
I will discuss some phenomenological consequences of extensions of the Standard Model containing a mediator lighter than the Dark Matter. A first example is that of DM self interactions, as a solution to putative discrepancies between collisionless cold DM and observations of galactic structures. I will show how this possibility is in tension with indirect detection constraints (from the CMB, gamma-rays and antiprotons), and what are the challenges to evade them via the introduction of an asymmetry in the DM population. A second example is that of dilution of the DM abundance via late decays of the mediator, that allows to evade the so-called unitarity bound. This enriches the physics case of several ongoing and planned telescopes (HESSII, HAWC, CTA, ANTARES, IceCube, KM3NeT, CALET,...) observing cosmic rays at and beyond 100 TeV.