Higgs inflation with non-minimal derivative coupling to gravity

Abstract

We consider an extension of Higgs inflation in which the Higgs field is non-minimally coupled to gravity through its kinetic term. We analyzed power-law coupling functions with positive or negative integer power and found that the Higgs boson can drive a successful inflation only for the cases $n=2,1,0,-1$. Theoretical predictions for both tensor to scalar ratio $r$ and scalar spectral index $n_s$ are within the 2018 \textit{Planck} $95\%$ CL. The behavior of the self coupling $\lambda$ with respect to the scalar field at the horizon crossing was obtained, and It was found that it can take values in the interval $\lambda \sim (10^{-7},0.3)$.

arXiv comment17 pages, 3 figures Major changes: theoretical framework extended, 3 figures added, discussion section revised, references added, 25 pages

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