期刊
PHYSICS LETTERS B
卷 815, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physletb.2021.136156
关键词
Inflation; Cosmological parameters from CMB; MCMC analysis
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [150343/2020-5]
- Programa de Capacitacao Institucional (PCI) do Observatorio Nacional/MCTI [301144/2019-2]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico [310790/2014-0, 400471/2014-0]
- Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro FAPERJ [233906]
Researchers investigated the observational viability of a class of alpha-attractors inflationary models using a double-well potential and slow-roll analysis. They found a continuous interpolation model between chaotic inflation and the universal attractor, and explored the parameter space of the model through MCMC analysis, determining the range of alpha values.
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 +/- 5.15(1 sigma). (c) 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
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