Gravitational reheating formulas and bounds in oscillating backgrounds
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866910682403831808 |
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| author | de Haro, Jaume Saló, Llibert Aresté Pan, Supriya |
| author_facet | de Haro, Jaume Saló, Llibert Aresté Pan, Supriya |
| contents | In this article we calculate the reheating temperature in the cosmological scenarios where heavy scalar particles are gravitationally produced, due to a conformally coupled interaction between a massive scalar quantum field and the Ricci scalar, during the oscillations of the inflaton field. We explore two distinct cases, namely the one in which these particles decay during the domination of the inflaton's energy density and the other one where the decay occurs after this phase. For each scenario, we have derived formulas to calculate the reheating temperatures based on the energy density of the produced particles and their decay rate. We establish bounds for the maximum reheating temperature, defined as the temperature reached by the universe when the decay of gravitationally produced particles concludes at the onset of the radiation-dominated epoch. Finally, we use the Born approximation to find analytic formulas for the reheating temperature. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_01671 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Gravitational reheating formulas and bounds in oscillating backgrounds de Haro, Jaume Saló, Llibert Aresté Pan, Supriya General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics Mathematical Physics In this article we calculate the reheating temperature in the cosmological scenarios where heavy scalar particles are gravitationally produced, due to a conformally coupled interaction between a massive scalar quantum field and the Ricci scalar, during the oscillations of the inflaton field. We explore two distinct cases, namely the one in which these particles decay during the domination of the inflaton's energy density and the other one where the decay occurs after this phase. For each scenario, we have derived formulas to calculate the reheating temperatures based on the energy density of the produced particles and their decay rate. We establish bounds for the maximum reheating temperature, defined as the temperature reached by the universe when the decay of gravitationally produced particles concludes at the onset of the radiation-dominated epoch. Finally, we use the Born approximation to find analytic formulas for the reheating temperature. |
| title | Gravitational reheating formulas and bounds in oscillating backgrounds |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics Mathematical Physics |
| url | https://arxiv.org/abs/2411.01671 |