Quadratic, Higgs and hilltop potentials in Palatini gravity
Nilay Bostan
Figure 10. For Higgs potential in the Palatini formalism in the cases of φ < v and low-N scenario, in the top figures display changing ns and r values for different ξ cases as function of v. The bottom figures show that ns − r predictions for selected ξ values, left panel: ξ > 0 and ξ = 0 cases, right panel: ξ < 0 cases. The pink (red) contour correspond to the 95% (68%) CL contour given by the Keck Array/BICEP2 and Planck collaborations [10].