تقرير
Observational constraints on $\alpha$-attractor inflationary models with a Higgs-like potential
| العنوان: | Observational constraints on $\alpha$-attractor inflationary models with a Higgs-like potential |
|---|---|
| المؤلفون: | Rodrigues, J. G., da Costa, S. Santos, Alcaniz, J. S. |
| سنة النشر: | 2020 |
| المجموعة: | Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | Astrophysics - Cosmology and Nongalactic Astrophysics, General Relativity and Quantum Cosmology, High Energy Physics - Phenomenology |
| الوصف: | We investigate the observational viability of a class of $\alpha$-attractors inflationary models in light of the most recent Cosmic Microwave Background (CMB) and Large-Scale Structure (LSS) data. By considering a double-well potential we perform a slow-roll analysis to study the behavior of this class of models, which is a continuous interpolation between the chaotic inflation for large values of $\alpha$ and the universal attractor, i.e., $n_s=1- 2/N$ and $r=\alpha 12/N^2$ for small $\alpha$, where $n_s$ is the scalar spectral index, $r$ is the tensor-to-scalar ratio, and $N$ is the e-fold number. In order to explore the parameter space of the model, we also perform a MCMC analysis and find $\alpha=7.56\pm 5.15$ ($1\sigma$). Comment: 22 pages, 6 figures, 2 tables. Minor corrections and references added. Version accepted for publication in Physics Letters B |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.physletb.2021.136156 |
| URL الوصول: | http://arxiv.org/abs/2007.10763 |
| رقم الأكسشن: | edsarx.2007.10763 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.physletb.2021.136156 |
|---|