LIGO/Virgo Black Holes from a First Order QCD Phase Transition
  We propose that $O(10 M_{\rm Sun})$ black holes observed by LIGO/Virgo
originate from a first order QCD phase transition at a temperature $T_*
\lesssim 100$~MeV. This is realized by keeping the quark masses small compared
to confinement scale down to $T\sim T_*$, making QCD transition first order. We
implement this scenario using a light scalar that could potentially be a good
dark matter candidate.
