On mass distribution of coalescing black holes
  Available data on the chirp mass distribution of the coalescing black hole
binaries in O1-O3 LIGO/Virgo runs are analyzed and compared statistically with
the distribution calculated under the assumption that these black holes are
primordial with a log-normal mass spectrum. The theoretically calculated chirp
mass distribution with the inferred best acceptable mass spectrum parameters,
$M_0=17 M_\odot$ and $\gamma=0.9$, perfectly describes the data. The value of
$M_0$ very well agrees with the theoretically expected one. On the opposite,
the chirp mass distribution of black hole binaries originated from massive
binary star evolution requires additional model adjustments to reproduce the
observed chirp mass distribution
