Posterior distributions for the coefficients of the inflation potential Taylor expanded to nth order (in natural units where ) reconstructed beyond the slow-roll approximation using Planck TT+lowP+BAO (filled contours) or TT, TE, EE+lowP (dashed contours). The plot shows only half of the results; the other half is symmetric, with opposite signs for Vφ and Vφφφ. Note that, unlike Fig. 13, the parameters shown here do not have flat priors, since they are mapped from the slow-roll parameters.
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