Non-minimally assisted chaotic inflation

Abstract

Conventional wisdom says that a chaotic inflation model with a power-law potential is ruled out by the recent Planck-BICEP/Keck results. We find, however, that the model can be assisted by a non-minimally coupled scalar field and still provides a successful inflation. Considering a power-law chaotic inflation model of the type $V\sim {\phi }^n$ with $n=\{2,4/3,1,2/3,1/3\}$, we show that $n=1/3$ ($n=\{2/3,1/3\}$) may be revived with the help of the quadratic (quartic) non-minimal coupling of the assistant field to gravity.

v1: 11 pages; v2: 11 pages, references updated, typos corrected, accepted for publication in JCAP

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Cited by in corpus (1)

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