Description
Author and Presenter: Douglas Tuckler
Abstract: Inelastic dark matter is a well-motivated benchmark for freeze-out and freeze-in production. In the freeze-in regime, if the mass splitting between the two dark matter states is small enough, the heavy dark matter state can be cosmologically long-lived and makes up half of the DM abundance at present time. If the mass splitting is lower than an MeV, the heavier dark matter state can only decay to photons and generates an indirect detection signal that can be observed with X-ray telescopes. In this talk, we consider inelastic dark matter with a dark photon mediator such that the heavier state decays to three photons. This photon spectrum can be detected by X-ray telescopes such as INTEGRAL/SPI, and we will show that indirect detection can access parameter space of dark photons that is currently unconstrained by other experiments.
