Cosmological constraints on slow-roll inflation: an update

Abstract

In light of the most recent cosmological observations, we provide new updated constraints on the slow-roll inflation in different extended scenarios beyond the $\Lambda \mathrm{CDM}$ cosmological model. Along with the usual six parameters, we simultaneously vary different combinations of additional parameters, including the running of the scalar spectral index ${\alpha }_s$, its running of running ${\beta }_s$, the tensor amplitude $r$ and the spatial curvature ${\Omega }_k$. From the Planck 2018 data, we find no evidence for a scalar running or a running of running, while analyzing the Atacama Cosmology Telescope data combined with WMAP 9-years observations data we find a preference for non-zero ${\alpha }_s$ and ${\beta }_s$ at the level of 2.9$\sigma$ and 2.7$\sigma$, respectively. Anyway, this preference is reduced when the tensor amplitude can vary in the model or ${\beta }_s$ is fixed to zero. The upper bound on $r$ is only slightly affected by the additional parameters while the differences in the datasets can remarkably change the compatibility among the different inflationary models, sometimes leading to discordant conclusions.

arXiv comment20 pages, 6 figures

References in corpus (81)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Efficient Computation of CMB anisotropies in closed FRW models
• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• The 6dF Galaxy Survey: Baryon Acoustic Oscillations and the Local Hubble Constant
• Planck 2018 results. X. Constraints on inflation
• The Standard Model Higgs boson as the inflaton
• Particle Physics Models of Inflation and the Cosmological Density Perturbation
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Planck 2018 results. I. Overview and the cosmological legacy of Planck
• Planck 2018 results. V. CMB power spectra and likelihoods
• Encyclopaedia Inflationaris
• Cosmological Backgrounds of Gravitational Waves
• Monodromy in the CMB: Gravity Waves and String Inflation
• Reconstructing the Inflaton Potential --- an Overview
• Gravity Waves and Linear Inflation from Axion Monodromy
• Planck 2018 results. VIII. Gravitational lensing
• The Cold Dark Matter Density Perturbation
• Adiabatic and entropy perturbations from inflation
• The Atacama Cosmology Telescope: DR4 Maps and Cosmological Parameters
• Quintessential inflation
• Planck evidence for a closed Universe and a possible crisis for cosmology
• Natural Inflation: Particle Physics Models, Power Law Spectra for Large Scale Structure, and Constraints from COBE
• Efficient sampling of fast and slow cosmological parameters
• CMB power spectrum parameter degeneracies in the era of precision cosmology
• N-flation
• BICEP2 / Keck Array x: Constraints on Primordial Gravitational Waves using Planck, WMAP, and New BICEP2/Keck Observations through the 2015 Season
• Curvature tension: evidence for a closed universe
• Inflationary perturbations from a potential with a step
• A universal attractor for inflation at strong coupling
• Superconformal generalizations of the Starobinsky model
• Measurements of the E-Mode Polarization and Temperature-E-Mode Correlation of the CMB from SPT-3G 2018 Data
• Eppur è piatto? The cosmic chronometer take on spatial curvature and cosmic concordance
• The evidence for a spatially flat Universe
• Equation-of-State Parameter for Reheating
• Comments on the Starobinsky Model of Inflation and its Descendants
• Scale-dependent gravitational waves from a rolling axion
• Quantum Cosmological Perturbations: Predictions and Observations
• Investigating Cosmic Discordance
• INFLATION WITH VARIABLE OMEGA
• Non-parametric spatial curvature inference using late-universe cosmological probes
• Adiabatic and Isocurvature Perturbations from Inflation: Power Spectra and Consistency Relations
• Inflation and the Theory of Cosmological Perturbations
• The galaxy power spectrum take on spatial curvature and cosmic concordance
• Blue Tensor Spectrum from Particle Production during Inflation
• WKB approximation for inflationary cosmological perturbations
• Rolling axions during inflation: perturbativity and signatures
• Can we have inflation with Omega > 1?
• Second Order General Slow-Roll Power Spectrum
• WMAP data and the curvature of space
• Cosmology Intertwined IV: The Age of the Universe and its Curvature
• Constraints on primordial gravitational waves from the Cosmic Microwave Background
• Planck 2015 constraints on the non-flat $\Lambda$CDM inflation model
• Observational constraints on successful model of quintessential Inflation
• Quantifying the global parameter tensions between ACT, SPT and Planck
• Consistency relation for $R^p$ inflation
• Updated Constraints and Forecasts on Primordial Tensor Modes
• High-Scale Inflation and the Tensor Tilt
• Primordial power spectra for curved inflating universes
• Inflation in a closed universe
• Propagating Speed of Primordial Gravitational Waves
• Big bounce and closed universe from spin and torsion
• Inflation in the closed FLRW model and the CMB
• Fitting string inflation to real cosmological data: the Fibre Inflation case
• Dynamics of Inflationary Universes with Positive Spatial Curvature
• Measurement on the cosmic curvature using the Gaussian process method
• The refractive index of relic gravitons
• Higher-Curvature Corrections and Tensor Modes
• A Consistency Relation for Single-Field Inflation with Power Spectrum Oscillations
• On the running of the spectral index to all orders: a new model dependent approach to constrain inflationary models
• Probing the inflationary background of gravitational waves from large to small scales
• Tensor perturbations during inflation in a spatially closed Universe
• Higher Order Corrections to the Primordial Gravitational Wave Spectrum and its Impact on Parameter Estimates for Inflation
• What is the amplitude of the Gravitational Waves background expected in the Starobinsky model ?
• Quantum gravitational onset of Starobinsky inflation in a closed universe
• Post-inflationary thermal histories and the refractive index of relic gravitons
• T-Model Inflation and Bouncing Cosmology
• The propagating speed of relic gravitational waves and their refractive index during inflation
• Numerical analysis of the generalized Starobinsky inflationary model
• Natural inflation with natural number of e-foldings

Cited by in corpus (33)

• Recent Advances on Inflation
• Inflationary interpretation of the stochastic gravitational wave background signal detected by pulsar timing array experiments
• Neutrino Mass Bounds in the era of Tension Cosmology
• Dynamical Dark Energy Beyond Planck? Constraints from multiple CMB probes, DESI BAO and Type-Ia Supernovae
• A double take on early and interacting dark energy from JWST
• Health checkup test of the standard cosmological model in view of recent Cosmic Microwave Background Anisotropies experiments
• The resilience of the Etherington-Hubble relation
• Is the Harrison-Zel'dovich spectrum coming back? ACT preference for $n_s\sim 1$ and its discordance with Planck
• Inflation, the Hubble Tension and Early Dark Energy: an alternative overview
• Quantifying the global "CMB tension" between the Atacama Cosmology Telescope and the Planck satellite in extended models of cosmology
• Towards a reliable calculation of relic radiation from primordial gravitational waves
• Measuring the reionization optical depth without large-scale CMB polarization
• Inflationary Potential as seen from Different Angles: Model Compatibility from Multiple CMB Missions
• CMB Anomalies and the Hubble Tension
• Tracking the Multifield Dynamics with Cosmological Data: A Monte Carlo approach
• A novel model-marginalized cosmological bound on the QCD axion mass
• Extended Analysis of Neutrino-Dark Matter Interactions with Small-Scale CMB Experiments
• Testing scale-invariant inflation against cosmological data
• Impact of the damping tail on neutrino mass constraints
• Lensing impact on cosmic relics and tensions
• Spatial curvature sensitivity to local $H_0$ from the Cepheid distance ladder
• How robust are the parameter constraints extending the $\Lambda$CDM model?
• Modular Invariant Slow Roll Inflation
• Quantum initial conditions for curved inflating universes
• One Extension to Explain Them All, One Scale-Invariant Spectrum to Test Them All, and in One Model Bind Them
• The reheating constraints to natural inflation in Horndeski gravity
• Holographic inflation and holographic dark energy from entropy of the anti-de Sitter black hole
• Simulating Cosmological Evolution by Quantum Quench of an Atomic BEC
• Gravitational waves in a cyclic Universe: resilience through cycles and vacuum state
• Sustaining quasi de-Sitter inflation with bulk viscosity
• Reheating constraints and the $H_0$ tension in Quintessential Inflation
• Evolution of the early universe in Einstein-Cartan theory
• Finite inflation in curved space