Observational consequences of chaotic inflation with nonminimal coupling to gravity

Abstract

Recently there was an extensive discussion of Higgs inflation in the theory with the potential λ(ϕ^2-v^2)^2 and nonminimal coupling to gravity {ξ\over 2}ϕ^2R, for ξ>> 1 and v<< 1. We extend this investigation to the theories m^2ϕ^2 and λ(ϕ^2-v^2)^2 with arbitrary values of ξand v and describe implementation of these models in supergravity. We analyze observational consequences of these models and find a surprising coincidence of the inflationary predictions of the model λ(ϕ^2-v^2)^2 with ξ<0 in the limit |ξ|v^2 \to 1 with the predictions of the Higgs inflation scenario for ξ>> 1.

18 pages, 11 figures, version accepted at JCAP

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