SciPost Submission Page
Ruling out QCD phase transition as a PBH origin of LIGO/Virgo events
by Joaquim Iguaz Juan
Submission summary
| Authors (as registered SciPost users): | Joaquim Iguaz Juan |
| Submission information | |
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| Preprint Link: | scipost_202211_00038v2 (pdf) |
| Date accepted: | April 28, 2023 |
| Date submitted: | Nov. 30, 2022, 1:34 p.m. |
| Submitted by: | Joaquim Iguaz Juan |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 14th International Conference on Identification of Dark Matter (IDM2022) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| 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)