Speaker
Description
Asteroid-mass primordial black holes (PBH) can explain the observed dark matter abundance while being consistent with the current indirect detection constraints. These PBH can produce gamma-ray signals from Hawking radiation that are within the sensitivity of future MeV sky searches. PBH which give rise to such observable gamma-ray signals have a cosmic origin from large primordial fluctuations. There must then be a companion, stochastic gravitational wave (GW) background produced by the same curvature fluctuations. We demonstrate that the resulting GW signals will be well within the sensitivity of future GW detectors. The multi-messenger signal from the observed gamma-rays and GW will allow a precise measurement of the primordial curvature perturbation that produces the PBH. We argue that the resulting correlation between the two types of observations can provide a smoking-gun signal of PBH.
