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Ruling out QCD phase transition as a PBH origin of LIGO/Virgo events

by Joaquim Iguaz Juan

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Submission summary

Authors (as registered SciPost users): Joaquim Iguaz
Submission information
Preprint Link: scipost_202211_00038v2  (pdf)
Date accepted: 2023-04-28
Date submitted: 2022-11-30 13:34
Submitted by: Iguaz, Joaquim
Submitted to: SciPost Physics Proceedings
Proceedings issue: 14th International Conference on Identification of Dark Matter (IDM2022)
Ontological classification
Academic field: Physics
Specialties:
  • Gravitation, Cosmology and Astroparticle Physics
Approach: Phenomenological

Abstract

The best-motivated scenario for a sizable primordial black hole (PBH) contribution to the LIGO/Virgo binary black hole mergers invokes the QCD phase transition, which naturally enhances the probability to form PBH with masses of stellar scale. We reconsider the expected mass function assuming a CMB-like primordial spectrum and associated not only to the QCD phase transition proper, but also the e+e− annihilation process, and analyze the constraints on this scenario from a number of observations. We find that the scenario is not viable, unless an ad hoc mass evolution for the PBH mass function and a cutoff in power-spectrum very close to the QCD scale are introduced by hand.

Published as SciPost Phys. Proc. 12, 052 (2023)


Reports on this Submission

Anonymous Report 1 on 2022-12-1 (Invited Report)

Report

It has been largely improved and can be now accepted.

  • validity: good
  • significance: high
  • originality: high
  • clarity: high
  • formatting: good
  • grammar: excellent

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