Primordial black holes
Among the many dark matter candidates proposed in the literature, primordial black holes are interesting since they could account for the gravitational wave signals observed by LIGO and VIRGO or seed the formation of supermassive black holes. The existence of these objects could be a natural consequence of inflation or be associated to long-range attractive forces stronger than gravity.
Selected paper(s) on this topic:
Selected talks(s) on this topic: