Understanding large scale CMB anomalies with the generalized non-minimal derivative coupling during inflation

Abstract

We study the observational implications of a class of inflationary models wherein the inflaton is coupled to the Einstein tensor through a generalized non-minimal derivative coupling (GNMDC). In particular, we explore whether these models can generate suitable features in the primordial spectrum of curvature perturbations as a possible explanation for the large-scale anomalies associated with the angular power spectrum of CMB temperature anisotropies. We derive model-independent constraints on the GNMDC function for such a scenario, considering both the scalar and tensor perturbations. We modify CosmoMC to accommodate our GNMDC framework and investigate different classes of inflationary models using a fully consistent numerical approach. We find that the hilltop-quartic model with a specific choice of the GNMDC function provides a considerable improvement over the best-fit reference $\Lambda$CDM model with a nearly scale-invariant power spectrum. While the large-scale structure observations should be able to provide independent constraints, future CMB experiments, such as CMB-S4 and CMB-Bharat, are expected to constrain further the parameter space of such beyond canonical single-field inflationary models.

arXiv commentv1: 34 pages, 7 figures, 4 tables; v2: 26 pages, 8 figures, 4 tables, published in Phys. Rev. D

References in corpus (85)

• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Efficient Computation of CMB anisotropies in closed FRW models
• Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• Planck 2018 results. X. Constraints on inflation
• The Simons Observatory: Science goals and forecasts
• Generalized G-inflation: Inflation with the most general second-order field equations
• Planck 2018 results. V. CMB power spectra and likelihoods
• Covariant Galileon
• Encyclopaedia Inflationaris
• Inflation Dynamics and Reheating
• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• Generalized Galileons: All scalar models whose curved background extensions maintain second-order field equations and stress tensors
• The Primordial Inflation Explorer (PIXIE): A Nulling Polarimeter for Cosmic Microwave Background Observations
• Horndeski theory and beyond: a review
• Planck 2018 results. VII. Isotropy and Statistics of the CMB
• Suppressing the lower Multipoles in the CMB Anisotropies
• Features of heavy physics in the CMB power spectrum
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Angular Power Spectra
• Inflationary perturbations from a potential with a step
• CMB Anomalies after Planck
• Large Non-Gaussianities in Single Field Inflation
• Generation and Characterization of Large Non-Gaussianities in Single Field Inflation
• Black holes with non-minimal derivative coupling
• Cosmology with Nonminimal Derivative Couplings
• Asymptotically locally AdS and flat black holes in Horndeski theory
• Features and New Physical Scales in Primordial Observables: Theory and Observation
• PRISM (Polarized Radiation Imaging and Spectroscopy Mission): An Extended White Paper
• What does inflation really predict?
• Inflation and WMAP three year data: Features have a Future!
• Punctuated inflation and the low CMB multipoles
• Primordial Black Holes from Inflation with Nonminimal Derivative Coupling
• LiteBIRD: JAXA's new strategic L-class mission for all-sky surveys of cosmic microwave background polarization
• Non-Gaussianity from Step Features in the Inflationary Potential
• New Constraints on Oscillations in the Primordial Spectrum of Inflationary Perturbations
• Primordial features due to a step in the inflaton potential
• Gradient instability for w < -1
• Multiple inflation and the WMAP 'glitches'
• Matter power spectrum: from Ly$\alpha$ forest to CMB scales
• BINGO: A code for the efficient computation of the scalar bi-spectrum
• Multiple inflation and the WMAP 'glitches' II. Data analysis and cosmological parameter extraction
• The tensor-to-scalar ratio in punctuated inflation
• Probing primordial features with future galaxy surveys
• Constraints on scalar-tensor theory of gravity by the recent observational results on gravitational waves
• Whipped inflation
• Initial state of matter fields and trans-Planckian physics: Can CMB observations disentangle the two?
• The Future of Primordial Features with Large-Scale Structure Surveys
• The Future of Primordial Features with 21 cm Tomography
• Combining power spectrum and bispectrum measurements to detect oscillatory features
• Primordial Features from Linear to Nonlinear Scales
• Generalized Non-Minimal Derivative Coupling: Application to Inflation and Primordial Black Hole Production
• Precise measurements of inflationary features with 21 cm observations
• Polyspectra searches for sharp oscillatory features in cosmic microwave sky data
• Spectrum oscillations from features in the potential of single-field inflation
• Primordial black holes in nonminimal derivative coupling inflation with quartic potential and reheating consideration
• On the evolution of tachyonic perturbations at super-Hubble scales
• Oscillatory features in the curvature power spectrum after a sudden turn of the inflationary trajectory
• Generating primordial features at large scales in two field models of inflation
• Search for features in the spectrum of primordial perturbations using Planck and other datasets
• Uncovering the History of Cosmic Inflation from Anomalies in Cosmic Microwave Background Spectra
• Primordial black holes ensued from exponential potential and coupling parameter in nonminimal derivative inflation model
• Primordial spectra from sudden turning trajectory
• Probing primordial features with next-generation photometric and radio surveys
• Constraints on inflation with LSS surveys: features in the primordial power spectrum
• Non-linear damping of superimposed primordial oscillations on the matter power spectrum in galaxy surveys
• Primordial Standard Clock Models and CMB Residual Anomalies
• Particle Production after Inflation with Non-minimal Derivative Coupling to Gravity
• The large scale CMB cut-off and the tensor-to-scalar ratio
• Planck residuals anomaly as a fingerprint of alternative scenarios to inflation
• Comparing multi-field primordial feature models with the Planck data
• Probing features in inflaton potential and reionization history with future CMB space observations
• Probing features in the primordial perturbation spectrum with large-scale structure data
• A case for kinetically dominated initial conditions for inflation
• Lensing anomaly and oscillations in the primordial power spectrum
• On the phantom barrier crossing and the bounds on the speed of sound in non-minimal derivative coupling theories
• Observing nulling of primordial correlations via the 21 cm signal
• New constraints on primordial features from the galaxy two-point correlation function
• Successful Higgs inflation from combined nonminimal and derivative couplings
• Effect of transitions in the Planck mass during inflation on primordial power spectra
• Constraints on features in the inflationary potential from future Euclid data
• A new phase of scalar field with a kinetic term non-minimally coupled to gravity
• Low-$\ell$ power suppression in punctuated inflation
• Nonlinear reconstruction of features in the primordial power spectrum from large-scale structure
• Inflation with Derivative Self-interaction and Coupling to Gravity
• Detectable Data-driven Features in the Primordial Scalar Power Spectrum

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