DBI inflation with a non-minimally coupled Gauss-Bonnet term

Abstract

We study the inflation in a model with a Gauss-Bonnet term which is non-minimally coupled to a DBI field. We study the spectrum of the primordial perturbations in detail. The non-Gaussianity of this model is considered and the amplitude of the non-Gaussianity is studied in both the equilateral and orthogonal configurations. By taking various functions of the DBI field, inflaton potential and the Gauss-Bonnet coupling term, we test the model with observational data and find some constraints on the Gauss-Bonnet coupling parameter.

31 pages, 6 figures, to appear in Phys. Rev. D

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Cited by in corpus (19)

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• Perturbation, Non-Gaussianity and Reheating in a GB-$\alpha$-Attractor Model
• Higgs Inflation with a Gauss-Bonnet term in the Jordan Frame
• Gauss-Bonnet Inflation after Planck2018
• $\alpha$-Attractor and Reheating in a Model with Non-Canonical Scalar Fields
• Warm-tachyon Gauss-Bonnet inflation in the light of Planck 2015 data
• Large Non-Gaussianity in Non-Minimally Coupled Derivative Inflation with Gauss-Bonnet Correction
• Gauss-Bonnet models with cosmological constant and non zero spatial curvature in $D=4$
• Mimetic DBI Inflation in Confrontation with Planck2018 data
• General aspects of Gauss-Bonnet models without potential in dimension four
• Inflation with exotic kinetic terms in Einstein-Chern-Simons gravity
• Tachyon Mimetic Inflation as an Instabilities-Free Model
• Lowering the self-coupling of the scalar field in a generalized Higgs inflation
• Viable Intermediate Inflation in the Mimetic DBI Model
• The Size of Local Bispectrum and Trispectrum in a Non-Minimal Inflation
• Consistency Relation and Non-Gaussianity in a Galileon Inflation
• Testing a Two Field Inflation Beyond the Slow-Roll Approximation
• On the coupling of vector fields to the Gauss-Bonnet invariant
• Testing an Inflation Model with Nonminimal Derivative Coupling in the Light of PLANCK 2015 Data