Gregory-Laflamme-type instability of boson strings and related phases in D = 5 Kaluza-Klein theory
Abstract We add an S 1 extra dimension (size L) to the well known D = 4 static, spherically symmetric Q-balls and boson stars. We show that the resulting uniform horizonless boson strings possess a static zero-mode for a critical value of L. This is at the threshold of a Gregory-Laflamme instability...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-08-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP08(2025)049 |
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| Summary: | Abstract We add an S 1 extra dimension (size L) to the well known D = 4 static, spherically symmetric Q-balls and boson stars. We show that the resulting uniform horizonless boson strings possess a static zero-mode for a critical value of L. This is at the threshold of a Gregory-Laflamme instability of these objects, occurring for larger values of L. The non-linear continuation of the zero-mode yields D = 5 non-uniform boson strings. In addition, there are also intrinsic D = 5 solutions describing localized boson stars on the S 1, supported by the contribution of the scalar field Kaluza-Klein modes. Basic properties of all three types of aforementioned solutions are discussed, together with their phase space. |
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| ISSN: | 1029-8479 |