LiteBIRD and CMB-S4 Sensitivities to Reheating in Plateau Models of Inflation

Abstract

We study the sensitivity of LiteBIRD and CMB-S4 to the reheating temperature and the inflaton coupling in three types of plateau-potential models of inflation, namely mutated hilltop inflation, radion gauge inflation, and $\alpha$-attractor T models. We first find relations between model parameters and CMB observables in all models. We then perform Monte Carlo Markov Chain based forecasts to quantify the information gain on the reheating temperature, the inflaton coupling, and the scale of inflation that can be achieved with LiteBIRD and CMB-S4, assuming a fiducial tensor-to-scalar ratio $\bar{r}\sim 0.02$ and neglecting foreground contamination of the B-mode polarization spectrum. We compare the results of the forecasts to those obtained from a recently proposed simple analytic method. We find that both LiteBIRD and CMB-S4 can simultaneously constrain the scale of inflation and the reheating temperature in all three types of models. They can for the first time obtain both an upper and lower bound on the latter, comprising the first ever measurement of the big bang temperature. In the mutated hilltop inflation and radion gauge inflation models this can be translated into a measurement of the inflaton coupling in parts of the parameter space. Constraining this microphysical parameter will help to understand how these models of inflation may be embedded into a more fundamental theory of particle physics.

86 pages, 43 figures; matches version to appear in JCAP

References in corpus (42)

• The Standard Model Higgs boson as the inflaton
• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• Nonperturbative Dynamics Of Reheating After Inflation: A Review
• Matter and Antimatter in the Universe
• The Sphaleron Rate in the Minimal Standard Model
• Towards a precision calculation of $N_{\mathrm{eff}}$ in the Standard Model II: Neutrino decoupling in the presence of flavour oscillations and finite-temperature QED
• Reheating constraints to inflationary models
• How accurately can 21 cm tomography constrain cosmology?
• CMB-S4: Forecasting Constraints on Primordial Gravitational Waves
• Reheating predictions in single field inflation
• Probing cosmological parameters with the CMB: Forecasts from full Monte Carlo simulations
• Unifying inflation with the axion, dark matter, baryogenesis and the seesaw mechanism
• New physics from the polarised light of the cosmic microwave background
• Baryogenesis from the weak scale to the grand unification scale
• Inflation and the Scale Dependent Spectral Index: Prospects and Strategies
• Inflaton Oscillations and Post-Inflationary Reheating
• Violent Preheating in Inflation with Nonminimal Coupling
• Gravitational Waves as a Big Bang Thermometer
• Gravitational wave background from Standard Model physics: Complete leading order
• Perturbation, Non-Gaussianity and Reheating in a GB-$\alpha$-Attractor Model
• Inflation: Theory and Observations
• CMB constraints on the inflaton couplings and reheating temperature in $\alpha$-attractor inflation
• BICEP/Keck Constraints on Attractor Models of Inflation and Reheating
• Probing reheating with primordial spectrum
• How Well Can Future CMB Missions Constrain Cosmic Inflation?
• Curing inflationary degeneracies using reheating predictions and relic gravitational waves
• Energy distribution and equation of state of the early Universe: matching the end of inflation and the onset of radiation domination
• Freeze-in from Preheating
• ${\varphi }^2$ Inflation at its Endpoint
• Revealing the Cosmic History with Gravitational Waves
• Constraining the general reheating phase in the $\alpha$-attractor inflationary cosmology
• Report of the Topical Group on Particle Dark Matter for Snowmass 2021
• On finite density effects on cosmic reheating and moduli decay and implications for Dark Matter production
• Slow-Roll Inflation at N3LO
• Reheating predictions in Gravity Theories with Derivative Coupling
• Upper Bound on Thermal Gravitational Wave Backgrounds from Hidden Sectors
• Constraints on Kähler moduli inflation from reheating
• LiteBIRD Science Goals and Forecasts: Improving Sensitivity to Inflationary Gravitational Waves with Multitracer Delensing
• Minimal plateau inflationary cosmologies and constraints from reheating
• Running primordial perturbations: Inflationary Dynamics and Observational Constraints
• Theories and Experiments for Testable Baryogenesis Mechanisms: A Snowmass White Paper

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• On Sphaleron Heating in the Presence of Fermions
• Intergalactic medium rotation measure of primordial magnetic fields
• Impact of Dark Sector Preheating on CMB Observables
• Non-thermal moduli production during preheating in $\alpha$-attractor inflation models
• ACT DR6 Insights on the Inflationary Attractor models and Reheating
• AliCPT Sensitivity to Cosmic Reheating