Consistency relation for $R^p$ inflation

Abstract

We consider $R^p$ inflation with $p\approx 2$, allowing small deviation from $R^2$ inflation. Using the inflaton potential in the Einstein frame, we construct a consistency relation between the scalar spectral index, the tensor-to-scalar ratio, as well as the running of the scalar spectral index, which will be useful to constrain a deviation from $R^2$ inflation in future observations.

9 pages, 8 figures; published version

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Cited by in corpus (2)

• Disentangling the $f(R)$ - Duality
• Stability of black holes in f(R) gravity