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arXiv · 1810.00202

Derivative coupling of inflaton to $R^{(3)}$

Yan-Li He·Yun-Song Piao
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Abstract

We study the inflation scenario with the non-minimally derivative coupling $XR^{(3)}$, where $X=\nabla_\mu\phi \nabla^\mu\phi$, $\phi$ is the inflaton and $R^{(3)}$ is the 3-dimensional intrinsic Ricci scalar on the spacelike hypersurface, and analytically calculate the corrections of $XR^{(3)}$ on the power spectra of primordial perturbations. It is found that for the $\phi^2$ inflation model, the corresponding predictions can be driven to the best-fit region of the $n_s$-$r$ diagram.

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Yan-Li He, Yun-Song Piao. 2018-09-29. Derivative coupling of inflaton to $R^{(3)}$. https://doi.org/10.1103/physrevd.99.083511

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