Chameleonic dark matter and reheating constraints in a logarithmic f(R) gravity
| Autor: | Arief Hermanto, null Yusmantoro, Romy H. S. Budhi |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | International Journal of Modern Physics D. |
| ISSN: | 1793-6594 0218-2718 |
| DOI: | 10.1142/s021827182350044x |
| Popis: | We investigated the viability of a logarithmic [Formula: see text] gravity in calculating the reheating temperature and describing dark matter. We discovered that the logarithmic model possessed a chameleon problem, and we addressed this by modifying the model to incorporate the [Formula: see text] term from the Starobinsky model. We examined the viability of the corrected model and revealed that it provided the same reheating temperature as the original logarithmic model, approximately [Formula: see text][Formula: see text]GeV. However, the constraints on the parameter [Formula: see text] are significantly different in the [Formula: see text]-Logarithmic [Formula: see text] gravity, in which we obtained [Formula: see text] instead of [Formula: see text] in the original model. Furthermore, the [Formula: see text]-Logarithmic [Formula: see text] model avoids the chameleon problem, and the scalaron derived from the model can be a potential dark matter candidate with [Formula: see text]. |
| Databáze: | OpenAIRE |
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