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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2508.07425 |
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| _version_ | 1866912813244481536 |
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| author | Kunz, Jutta Mikhaliuk, Aliaksei Shnir, Yakov |
| author_facet | Kunz, Jutta Mikhaliuk, Aliaksei Shnir, Yakov |
| contents | We investigate boson stars in an $O(3)$ scalar field theory with a symmetry-breaking potential. By constructing numerically spherically symmetric solutions, we demonstrate that the model gives rise to a rich set of field configurations. The negative coupling constant of the scalar self-interactions allows for two types of boson stars: Type I solutions represent the usual boson stars, that emerge from the vacuum as the boson frequency is decreased below the boson mass, whereas type II boson stars emerge from a set of static soliton solutions. Depending on the strengths of the gravitational and the electric coupling constants, both types or only one type is present. At a critical set of coupling constants, both types undergo a bifurcation. There the spirals of both types disconnect from their branches and reconnect with each other, while the remaining branches of both types also reconnect with each other. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_07425 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Two types of boson stars in $U(1)$ gauged $3+1$-dimensional $O(3)$ sigma-model Kunz, Jutta Mikhaliuk, Aliaksei Shnir, Yakov High Energy Physics - Theory We investigate boson stars in an $O(3)$ scalar field theory with a symmetry-breaking potential. By constructing numerically spherically symmetric solutions, we demonstrate that the model gives rise to a rich set of field configurations. The negative coupling constant of the scalar self-interactions allows for two types of boson stars: Type I solutions represent the usual boson stars, that emerge from the vacuum as the boson frequency is decreased below the boson mass, whereas type II boson stars emerge from a set of static soliton solutions. Depending on the strengths of the gravitational and the electric coupling constants, both types or only one type is present. At a critical set of coupling constants, both types undergo a bifurcation. There the spirals of both types disconnect from their branches and reconnect with each other, while the remaining branches of both types also reconnect with each other. |
| title | Two types of boson stars in $U(1)$ gauged $3+1$-dimensional $O(3)$ sigma-model |
| topic | High Energy Physics - Theory |
| url | https://arxiv.org/abs/2508.07425 |