Radiative Inflation and Dark Energy

TL;DR

This paper introduces a model linking inflation and Dark Energy through radiative symmetry breaking, predicting observable cosmological parameters consistent with current data and potentially testable by future experiments.

Contribution

It presents a novel radiative symmetry breaking model that unifies inflation and Dark Energy, with specific predictions for spectral index and tensor-to-scalar ratio.

Findings

Predicted spectral index range 0.955 to 0.967

Tensor-to-scalar ratio range 0.142 to 0.186

Model consistent with WMAP data and testable by Planck

Abstract

We propose a model based on radiative symmetry breaking that combines inflation with Dark Energy and is consistent with the WMAP 7-year regions. The radiative inflationary potential leads to the prediction of a spectral index 0.955 \lesssim n_S \lesssim 0.967 and a tensor to scalar ratio 0.142 \lesssim r \lesssim 0.186, both consistent with current data but testable by the Planck experiment. The radiative symmetry breaking close to the Planck scale gives rise to a pseudo Nambu-Goldstone boson with a gravitationally suppressed mass which can naturally play the role of a quintessence field responsible for Dark Energy. Finally, we present a possible extra dimensional scenario in which our model could be realised.