Strong clustering of primordial black holes from Affleck-Dine mechanism
  Primordial black hole (PBH) is a fascinating candidate for the origin of
binary merger events observed by LIGO-Virgo collaboration. The spatial
distribution of PBHs at formation is an important feature to estimate the
merger rate. We investigate the clustering of PBHs formed by Affleck-Dine (AD)
baryogenesis, where dense baryon bubbles collapse to form PBHs. We found that
formed PBHs show a strong clustering due to the stochastic dynamics of the AD
field. Including the clustering, we evaluate the merger rate and isocurvature
perturbations of PBHs, which show significant deviations from those without
clustering.
