Self-Destructing Dark Matter
  We present Self-Destructing Dark Matter (SDDM), a new class of dark matter
models which are detectable in large neutrino detectors. In this class of
models, a component of dark matter can transition from a long-lived state to a
short-lived one by scattering off of a nucleus or an electron in the Earth. The
short-lived state then decays to Standard Model particles, generating a dark
matter signal with a visible energy of order the dark matter mass rather than
just its recoil. This leads to striking signals in large detectors with high
energy thresholds. We present a few examples of models which exhibit self
destruction, all inspired by bound state dynamics in the Standard Model. The
models under consideration exhibit a rich phenomenology, possibly featuring
events with one, two, or even three lepton pairs, each with a fixed invariant
mass and a fixed energy, as well as non-trivial directional distributions. This
motivates dedicated searches for dark matter in large underground detectors
such as Super-K, Borexino, SNO+, and DUNE.
