Inflation coupled to a Gauss-Bonnet term

Abstract

The newly released Planck CMB data place tight constraints on slow-roll inflationary models. Some of commonly discussed inflationary potentials are disfavored due mainly to the large tensor-to-scalar ratio. In this paper we show that these potentials may be in good agreement with the Planck data when the inflaton has a non-minimal coupling to the Gauss-Bonnet term. Moreover, such a coupling violates the consistency relation between the tensor spectral index and tensor-to-scalar ratio. If the tensor spectral index is allowed to vary freely, the Planck constraints on the tensor-to-scalar ratio are slightly improved.

7 pages, 2 figures, references added

References in corpus (21)

• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Dark energy in modified Gauss-Bonnet gravity: late-time acceleration and the hierarchy problem
• Cosmology and Astrophysical Constraints of Gauss-Bonnet Dark Energy
• Circular Polarization of Primordial Gravitational Waves in String-inspired Inflationary Cosmology
• Gauss-Bonnet Quintessence: Background Evolution, Large Scale Structure and Cosmological Constraints
• Holographic Dark Energy in Braneworld Models with a Gauss-Bonnet Term in the Bulk. Interacting Behavior and the w =-1 Crossing
• Correspondence between Holographic and Gauss-Bonnet dark energy models
• Power spectra from an inflaton coupled to the Gauss-Bonnet term
• Gauss-Bonnet cosmologies: crossing the phantom divide and the transition from matter dominance to dark energy
• Primordial non-Gaussianities in general modified gravitational models of inflation
• Accelerating Cosmologies in the Einstein-Gauss-Bonnet Theory with Dilaton
• Realizing Scale-invariant Density Perturbations in Low-energy Effective String Theory
• Non-minimal Maxwell-Modified Gauss-Bonnet Cosmologies: Inflation and Dark Energy
• Cosmic acceleration and crossing of $\omega =-1$ in non-minimal modified Gauss-Bonnet gravity
• DBI inflation with a non-minimally coupled Gauss-Bonnet term
• Solutions of Higher Dimensional Gauss-Bonnet FRW Cosmology
• A Note on the Viability of Gauss-Bonnet Cosmology
• Observational constrains on the DGP brane-world model with a Gauss-Bonnet term in the bulk
• Supernova, baryon acoustic oscillations, and CMB surface distance constraints on f(G) higher order gravity models
• Observational constraints on the energy scale of inflation
• More on the dilatonic Einstein-Gauss-Bonnet gravity

Cited by in corpus (75)

• Taiji Program: Gravitational-Wave Sources
• Recent Advances on Inflation
• The 4D Einstein-Gauss-Bonnet Theory of Gravity: A Review
• Swampland Implications of GW170817-compatible Einstein-Gauss-Bonnet Gravity
• Unifying of Inflation with Early and Late Dark Energy Epochs in Axion $F(R)$ Gravity
• Charged 4D Einstein-Gauss-Bonnet-AdS Black Holes: Shadow, Energy Emission, Deflection Angle and Heat Engine
• Viable Inflation in Scalar-Gauss-Bonnet Gravity and Reconstruction from Observational Indices
• Parity breaking signatures from a Chern-Simons coupling during inflation: the case of non-Gaussian gravitational waves
• Observational constraints on slow-roll inflation coupled to a Gauss-Bonnet term
• A Refined Einstein-Gauss-Bonnet Inflationary Theoretical Framework
• Inflation with Gauss-Bonnet coupling
• Inflationary Phenomenology of Einstein Gauss-Bonnet Gravity Compatible with GW170817
• Observational Constraints on the Regularized 4D Einstein-Gauss-Bonnet Theory of Gravity
• Inflation driven by Einstein-Gauss-Bonnet gravity
• Gravity with a generalized conformal scalar field: Theory and solutions
• Inflation with a quartic potential in the framework of Einstein-Gauss-Bonnet gravity
• Inflationary models with non-minimally derivative coupling
• Viable Inflationary Models in a Ghost-free Gauss-Bonnet Theory of Gravity
• Reconstruction of the Scalar Field Potential in Inflationary Models with a Gauss-Bonnet term
• Reheating in Gauss-Bonnet-coupled inflation
• Primordial Gravitational Waves Predictions for GW170817-compatible Einstein-Gauss-Bonnet Theory
• Gauss-Bonnet term corrections in scalar field cosmology
• De Sitter solutions in Einstein-Gauss-Bonnet gravity
• Reviving non-Minimal Horndeski-like Theories after GW170817: Kinetic Coupling Corrected Einstein-Gauss-Bonnet Inflation
• Gauss-Bonnet Inflation after Planck2018
• Black Holes in the Scalar-Tensor Formulation of 4D Einstein-Gauss-Bonnet Gravity: Uniqueness of Solutions, and a New Candidate for Dark Matter
• Construction of inflationary scenarios with the Gauss-Bonnet term and nonminimal coupling
• A Nearly Massless Graviton in Einstein-Gauss-Bonnet Inflation with Linear Coupling Implies Constant-roll for the Scalar Field
• Constraints on the Reheating Parameters after Gauss-Bonnet Inflation from the Primordial Gravitational Waves
• A Study of an Einstein Gauss-Bonnet Quintessential Inflationary Model
• Low Scale Higgs Inflation with Gauss-Bonnet Coupling
• Inflationary Dynamics and Swampland Criteria for Modified Gauss-Bonnet Gravity Compatible with GW170817
• Reconstruction of GR cosmological solutions in modified gravity theories
• Primordial Spectra of slow-roll inflation at second-order with the Gauss-Bonnet correction
• Bottom-Up Reconstruction of Viable GW170817 Compatible Einstein-Gauss-Bonnet Theories
• Late-Time Cosmology of Scalar-Coupled $f(R,\mathcal{G})$ Gravity
• Higher-Curvature Corrections and Tensor Modes
• Warm-tachyon Gauss-Bonnet inflation in the light of Planck 2015 data
• Observational constraints on inflationary models with non-minimally derivative coupling by ACT
• Slow-Roll Inflation with Exponential Potential in Scalar-Tensor Models
• Instability of Black Holes with a Gauss-Bonnet Term
• New slow-roll approximations for inflation in Einstein-Gauss-Bonnet gravity
• Exact Inflation in Einstein-Gauss-Bonnet Gravity
• Primordial black holes in scalar field inflation coupled to the Gauss-Bonnet term with fractional power-law potentials
• Slow-Roll Inflation in Scalar-Tensor Models
• Constraining scalar-Gauss-Bonnet Inflation by Reheating, Unitarity and PLANCK
• Study of Goldstone Inflation in the domain of Einstein-Gauss-Bonnet gravity
• Gravitational Waves from Preheating in Gauss-Bonnet Inflation
• Revisiting slow-roll dynamics and the tensor tilt in general single-field inflation
• String-inspired Teleparallel Cosmology
• Inflationary Models with Gauss-Bonnet Coupling in Light of ACT Observations
• $k$-Inflation-corrected Einstein-Gauss-Bonnet Gravity with Massless Primordial Gravitons
• History of cosmic evolution with modified Gauss-Bonnet-dilatonic coupled term
• Swampland Criteria and Constraints on Inflation in a $f(R,T)$ Gravity Theory
• Gauss-Bonnet inflation with a constant rate of roll
• Interacting Models of Dark Energy and Dark Matter in Einstein scalar Gauss Bonnet Gravity
• Primordial black holes in non-minimal Gauss-Bonnet inflation in light of the PTA data
• Slow-roll inflation from massive vector fields non-minimally coupled to gravity
• Ultraviolet Sensitivity in Higgs-Starobinsky Inflation
• Power Spectra of Slow-Roll inflation in the consistent $D\to 4$ Einstein-Gauss-Bonnet gravity
• Inflation with Gauss-Bonnet and Chern-Simons higher-curvature-corrections in the view of GW170817
• Deviation from Slow-Roll Regime in the EGB Inflationary Models with $r\sim N_e^{-1}$
• Higgs Inflation with linear and quadratic curvature corrections
• Generalized Horndeski-Like Einstein Gauss-Bonnet Inflation with Massless Primordial Gravitons
• Primordial black holes in SB SUSY Gauss-Bonnet inflation
• Early-universe cosmology in Einstein-scalar-Gauss-Bonnet gravity
• Slow-roll approximations in Einstein--Gauss--Bonnet gravity formulated in terms of e-folding numbers
• Cosmology in a model with Lagrange multiplier, and Gauss-Bonnet and non-minimal kinetic couplings
• Sound Speed Resonance of Gravitational Waves in Gauss-Bonnet-coupled inflation
• Gauss-Bonnet-induced symmetry breaking/restoration during inflation
• Implications of pulsar timing arrays for Gauss-Bonnet Inflation
• Slow roll inflation and BB mode angular power spectrum of CMB
• On the coupling of vector fields to the Gauss-Bonnet invariant
• Search for dark Higgs inflaton with curvature couplings at LHC experiments
• Beyond $f(\varphi )\mathcal{G}$: Gauss--Bonnet inflation with $\mu (\varphi ,X)$