Higher-curvature corrections and tensor modes

Higher-curvature corrections to the effective gravitational action may leave signatures in spectrum of primordial tensor perturbations if inflationary energy scale is sufficiently high. In this paper, we further investigate effects a coupling Inflaton field higher-curvature tensors models with minimal breaking conformal symmetry. We show that an observable violation consistency relation from implies also relatively large running tilt, enhanced even by some order magnitude respect standard slow-roll case. This two-point function could test recognize effects, above all they are translated into blue tilted visible future wave experiments. Exploiting current cosmic microwave background and data, derive constraints on parameters, inferring seem be disfavored.