[Title] A Possible Mass Distribution of Primordial Black Holes Implied by LIGO-Virgo
[Speaker] 邓鹤凌 亚利桑那州立大学
[Abstract] The LIGO-Virgo Collaboration has so far detected around 90 black holes, whose mass distribution appears to have a peak at ～ 30M☉ and two tails on the ends. By assuming that they all have a primordial origin, we analyze the GWTC-1 (O1&O2) and GWTC-2 (O3a) datasets by performing maximum likelihood estimation on a broken power-law mass function, which appears to behave better than the popular log-normal mass function. Surprisingly, such a simple distribution can be realized in our previously proposed mechanism of PBH formation, where the black holes are formed by vacuum bubbles that nucleate during inflation via quantum tunneling