تقرير
Brane inflation and the robustness of the Starobinsky inflationary model
| العنوان: | Brane inflation and the robustness of the Starobinsky inflationary model |
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| المؤلفون: | da Costa, S. Santos, Benetti, M., Neves, R. M. P., Brito, F. A., Silva, R., Alcaniz, J. S. |
| المصدر: | Eur. Phys. J. Plus (2021) 136:84 |
| سنة النشر: | 2020 |
| المجموعة: | Astrophysics General Relativity and Quantum Cosmology |
| مصطلحات موضوعية: | Astrophysics - Cosmology and Nongalactic Astrophysics, General Relativity and Quantum Cosmology |
| الوصف: | The first inflationary model conceived was the one proposed by Starobinsky which includes an additional term quadratic in the Ricci-scalar R in the Einstein-Hilbert action. The model is now considered a target for several future cosmic microwave background experiments given its compatibility with current observational data. In this paper, we analyse the robustness of the Starobinsky inflation by inserting it into a generalized scenario based on a $\beta$-Starobinsky inflation potential, which is motivated through brane inflation. In the Einstein frame, the generalized model recovers the original model for $\beta=0$, whereas $\forall \beta \neq 0$ represents an extended class of models that admit a wider range of solutions. We investigate limits on $\beta$ from current cosmic microwave background and baryonic acoustic oscillation data and find that only a small deviation from the original scenario is allowed, $\beta=-0.08 \pm 0.12$ (68% C.L.), which is fully compatible with zero and confirms the robustness of the Starobinsky inflationary model in light of current observations. Comment: 10 pages, 5 figures, 2 tables |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1140/epjp/s13360-020-01015-1 |
| URL الوصول: | http://arxiv.org/abs/2007.09211 |
| رقم الأكسشن: | edsarx.2007.09211 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1140/epjp/s13360-020-01015-1 |
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