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/4 (φ2-v2)2 and nonminimal coupling to gravity ξ/2 φ2R, for ξ 1 and v 1. We extend this investigation to the theories m2/2 φ2 and λ/4 (φ2-v2)2 with arbitrary values of ξ and 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/4 (φ2-v2)2 with ξ < 0 in the limit |ξ|v2 1 with the predictions of the Higgs inflation scenario for ξ 1. © 2011 IOP Publishing Ltd and SISSA.