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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_00038v1 (pdf) |
| Date submitted: | 2022-11-21 16:49 |
| 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: |
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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 nat- urally enhances the probability to form PBH with masses of stellar scale. We reconsider the expected mass function 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.
Current status:
Reports on this Submission
Report #1 by Anonymous (Referee 2) on 2022-11-29 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202211_00038v1, delivered 2022-11-29, doi: 10.21468/SciPost.Report.6232
Report
The manuscript examines the mechanism that generates the LiGO/Virgo signals from a CMB-like primordial perturbation spectrum with modifications caused by d.o.f. change. The work shows that such an explanation has been excluded by various observables.
This manuscript is very useful and should be accepted by SciPost Physics Proceedings after several changes.
Requested changes
1. Most importantly, the manuscript is too long to fit the journal's requirements. I suggest the author reduce sections 2 and 3 significantly, to make it around 4 pages.
2. There are many references missing in the manuscript, showing as "[REF]" or "??" now. This needs to be corrected. Also, a "to" is missing "In order check", among some minor typos.
3. I suggest the author mention that the exclusion only applies to CMB-like primordial spectrum in the abstract. Now it sounds too strong.
Author: Joaquim Iguaz on 2022-11-30 [id 3090]
(in reply to Report 1 on 2022-11-29)We would like to thank the referee for their appreciation of our manuscript. In the following, we reply to their comments and list the changes made to the manuscript:
1) The length has been considerably reduced. We hope it now fits the journal requirements.
2) References corrected.
3) It is now mentioned in the abstract that we assume a CMB-like power spectrum.
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Anonymous on 2022-11-30 [id 3093]
(in reply to Joaquim Iguaz on 2022-11-30 [id 3090])I believe the author has addressed the concerns in the report, and can be accepted for SciPost Physics Proceedings now.
Anonymous on 2022-11-30 [id 3092]
(in reply to Joaquim Iguaz on 2022-11-30 [id 3090])Please resubmit an updated version.