Gauged Nambu-Jona-Lasinio inflation

TL;DR

This paper explores a gauged Nambu-Jona-Lasinio model in curved spacetime, demonstrating its potential to produce inflation consistent with Planck 2015 data and serving as an alternative to Higgs inflation.

Contribution

It introduces a novel inflationary model based on the gauged Nambu-Jona-Lasinio framework with RG-improved effective action analysis.

Findings

Model can produce CMB fluctuations consistent with observations

Inflationary parameters align with Planck 2015 data

Potential as an alternative Higgs inflation candidate

Abstract

We investigate the gauged Nambu-Jona-Lasinio model in curved spacetime at the large $N_c$ limit and in slow-roll approximation. The model can be described by the renormalization group corrected gauge-Higgs-Yukawa theory with the corresponding compositeness conditions. Evaluating the renormalization group (RG) improved effective action, we show that such model can produce CMB fluctuations and find inflationary parameters: spectral index, tensor-to-scalar-ratio and running of the spectral index. We demonstrate that the model can naturally satisfy the Planck 2015 data and maybe considered as an alternative candidate for Higgs inflation.