Spekaer: M. A. Abramowicz

Abstract: If there are primordial black holes in the dark matter halo, they must collide with the Galactic neutron stars (NS) and produce light black holes (LBH), with masses below 1.4 M_Sun. This has observational consequences that may be checked by microlensing, by LIGO-Virgo-Kagra interferometers detecting gravitational waves from collisions of LBH with NS and BH, by detecting LBH in X-ray binaries and from pulsars statistics.