Supercool Composite Dark Matter beyond 100 TeV
  Dark matter could be a composite state of a confining sector with an
approximate scale symmetry. We consider the case where the associated
pseudo-Goldstone boson, the dilaton, mediates its interactions with the
Standard Model. When the confining phase transition in the early universe is
supercooled, its dynamics allows for dark matter masses up to $10^6$ TeV. We
derive the precise parameter space compatible with all experimental
constraints, finding that this scenario can be tested partly by telescopes and
entirely by gravitational waves.
