SciPost Submission Page
Ruling out QCD phase transition as a PBH origin of LIGO/Virgo events
by Joaquim Iguaz Juan
This Submission thread is now published as
Submission summary
| 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.
