Observational constraints on alpha-attractor inflationary models with a Higgs-like potential

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/).

Automated summary

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.