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Higgs Inflation via the unmodified metastable Standard Model Higgs Potentialis possible if the effective Planck mass in the Jordan frame increases afterinflation ends. Here we consider the predictions of this model independently ofthe dynamics responsible for the Planck mass transition. The classicalpredictions are the same as for conventional Higgs Inflation. The quantumcorrections are dependent upon the conformal frame in which the effectivepotential is calculated. We generalise beyond the usual Prescription I and IIrenormalisation frame choices to include intermediate frames characterised by aparameter $\alpha$. We find that the model predicts a well-defined correlationbetween the values of the scalar spectral index $n_{s}$ and tensor-to-scalarratio $r$. For values of $n_{s}$ varying between the 2-$\sigma$ Planckobservational limits, we find that $r$ varies between 0.002 and 0.005 as$n_{s}$ increases, compared to the classical prediction of 0.003. Thereforesignificantly larger or smaller values of $r$ are possible, which arecorrelated with larger or smaller values of $n_{s}$. This can be tested via thedetection of primordial gravitational waves by the next generation of CMBpolarisation experiments.

Higgs Inflation via the Metastable Standard Model Potential, Generalised  Renormalisation Frame Prescriptions and Predictions for Primordial  Gravitational Waves