Stellar Bounds on Light Spin-2 Particles in Bimetric Theories
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arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866911250603048960 |
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| author | García-Cely, Camilo Ringwald, Andreas |
| author_facet | García-Cely, Camilo Ringwald, Andreas |
| contents | Using the bimetric formalism, we compute the production and emission rates of light spin-2 particles in non-degenerate stellar interiors through photoproduction and bremsstrahlung processes, including the effects of plasma screening. By comparing the resulting energy-loss rates with observational limits on stellar cooling, we derive bounds on the coupling strength and mass of the spin-2 particle. Assuming these particles are the dark matter of the Universe, the obtained constraints are competitive with existing astrophysical and cosmological limits, excluding a wide region of parameter space in the mass range 5-30 eV. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_03707 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Stellar Bounds on Light Spin-2 Particles in Bimetric Theories García-Cely, Camilo Ringwald, Andreas High Energy Physics - Phenomenology General Relativity and Quantum Cosmology Using the bimetric formalism, we compute the production and emission rates of light spin-2 particles in non-degenerate stellar interiors through photoproduction and bremsstrahlung processes, including the effects of plasma screening. By comparing the resulting energy-loss rates with observational limits on stellar cooling, we derive bounds on the coupling strength and mass of the spin-2 particle. Assuming these particles are the dark matter of the Universe, the obtained constraints are competitive with existing astrophysical and cosmological limits, excluding a wide region of parameter space in the mass range 5-30 eV. |
| title | Stellar Bounds on Light Spin-2 Particles in Bimetric Theories |
| topic | High Energy Physics - Phenomenology General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2511.03707 |