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Rodrigues, J.G.; Santos da Costa, S.; Alcaniz, J.S.
Physics letters. B, 04/2021, Letnik: 815Journal Article
We investigate the observational viability of a class of α-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 α and the universal attractor, i.e., ns=1−2/N and r=α12/N2 for small α, where ns 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 α=7.56±5.15 (1σ).
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