Gravitational Production of Spin-3/2 Particles During Reheating
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866917029584306176 |
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| author | Kaneta, Kunio Ke, Wenqi Mambrini, Yann Olive, Keith A. Verner, Sarunas |
| author_facet | Kaneta, Kunio Ke, Wenqi Mambrini, Yann Olive, Keith A. Verner, Sarunas |
| contents | We compute the density of a spin-$\frac32$ particle, the raritron, produced at the end of inflation due to gravitational interactions. We consider a background inflaton condensate as the source of this production, mediated by the exchange of a graviton. This production greatly exceeds the gravitational production from the emergent thermal bath during reheating. The relic abundance limit sets an absolute minimum mass for a stable raritron, though there are also model dependent constraints imposed by unitarity. We also examine the case of gravitational production of a gravitino, taking into account the goldstino evolution during reheating. We compare these results with conventional gravitino production mechanisms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_15146 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Gravitational Production of Spin-3/2 Particles During Reheating Kaneta, Kunio Ke, Wenqi Mambrini, Yann Olive, Keith A. Verner, Sarunas High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Physics - Theory We compute the density of a spin-$\frac32$ particle, the raritron, produced at the end of inflation due to gravitational interactions. We consider a background inflaton condensate as the source of this production, mediated by the exchange of a graviton. This production greatly exceeds the gravitational production from the emergent thermal bath during reheating. The relic abundance limit sets an absolute minimum mass for a stable raritron, though there are also model dependent constraints imposed by unitarity. We also examine the case of gravitational production of a gravitino, taking into account the goldstino evolution during reheating. We compare these results with conventional gravitino production mechanisms. |
| title | Gravitational Production of Spin-3/2 Particles During Reheating |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Physics - Theory |
| url | https://arxiv.org/abs/2309.15146 |