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Extremal stringy black holes in equilibrium at first order in α'
by Tomás Ortín, Alejandro Ruipérez and Matteo Zatti
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Submission summary
| Authors (as registered SciPost users): | Tomás Ortín |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202303_00039v1 (pdf) |
| Date submitted: | 2023-03-30 10:42 |
| Submitted by: | Ortín, Tomás |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Theoretical |
Abstract
We compute the first-order α' corrections to well-known families of heterotic multi-center black-hole solutions in five and four dimensions. The solutions can be either supersymmetric or non-supersymmetric, depending on the relative sign between two of the black-hole charges. For both cases, we find that the equilibrium of forces persists after including the α0 corrections, as the existence of multi-center solutions free of unphysical singularities shows. We analyze the possibility of black-hole fragmentation.
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Reports on this Submission
Anonymous Report 2 on 2023-9-15 (Invited Report)
- Cite as: Anonymous, Report on arXiv:scipost_202303_00039v1, delivered 2023-09-15, doi: 10.21468/SciPost.Report.7830
Report
This paper presents the leading corrections, in \alpha', in heterotic supergravity to a class of static black holes in four and five dimensions. Building on some of the authors earlier work, the main new result in this paper is to extend their analysis by computing the corrections to multi-centre black holes and also a class of extremal non-supersymmetry solutions. These are constructed in essentially the same way as the supersymmetric solutions, namely in terms of corrections to a set of harmonic functions on a flat and Gibbons-Hawking base space. The non-supersymmetric extremal black holes are a special non-generic subclass of extremal that are essentially the same as the supersymmetric solutions up to a sign change in the Kalb-Ramond field strength (this breaks supersymmetry, but retains the essential linearity of this class of solutions). An interesting feature is that the corrected multi-centred solutions remain in static equilibrium, that is, no conical struts between the holes develop. The authors also argue that no other singularities in the exterior region arise (from vanishing of the harmonic functions) in regimes where the \alpha' expansion is valid. The paper is well written and is suitable for publication.
Report
Please find the full report in the attachment.
I believe the paper provides an interesting result and is well-written. I would recommend it be published upon some minor clarifications in order to ensure its validity .
On the other hand, I have little familiarity with how this journal interprets its acceptance criteria and therefore, given the place of this manuscript within a number of related articles, it may fall short of those.
Author: Tomás Ortín on 2023-10-03 [id 4024]
(in reply to Report 1 on 2023-07-09)We would like to thank the referee for his/her careful reading of the manuscript and for his/her constructive questions and comments. Our detailed answers can be found in the attached file.
Concerning the acceptance criteria, we would like to point out that the solutions presented here are the first of its kind in the literature (string theory literature or higher-order gravity literature) and that their very existence has implications for the alpha'-corrected interactions of stringy black holes.
Attachment:
answertorefereescipost20230920.pdf