CMB constraints on the inflaton couplings and reheating temperature in $\alpha$-attractor inflation

Abstract

We study reheating in $\alpha$-attractor models of inflation in which the inflaton couples to other scalars or fermions. We show that the parameter space contains viable regions in which the inflaton couplings to radiation can be determined from the properties of CMB temperature fluctuations, in particular the spectral index. This may be the only way to measure these fundamental microphysical parameters, which shaped the universe by setting the initial temperature of the hot big bang and contain important information about the embedding of a given model of inflation into a more fundamental theory of physics. The method can be applied to other models of single field inflation.

arXiv comment39 pages, 14 figures. Identical to the version that is to appear in JHEP

References in corpus (66)

• Towards the Theory of Reheating After Inflation
• Reheating after Inflation
• Encyclopaedia Inflationaris
• Universality Class in Conformal Inflation
• Superconformal Inflationary $\alpha$-Attractors
• Dynamics of Symmetry Breaking and Tachyonic Preheating
• Matter and Antimatter in the Universe
• The Unity of Cosmological Attractors
• The Sphaleron Rate in the Minimal Standard Model
• Resummation in a Hot Scalar Field Theory
• Preheating in the Standard Model with the Higgs-Inflaton coupled to gravity
• First CMB Constraints on the Inflationary Reheating Temperature
• Superconformal generalizations of the Starobinsky model
• Reheating constraints to inflationary models
• Reheating predictions in single field inflation
• Inflation after WMAP3: Confronting the Slow-Roll and Exact Power Spectra with CMB Data
• Preheating of Fermions
• Non-minimal Inflationary Attractors
• Observing the Inflationary Reheating
• The Equation of State and Duration to Radiation Domination After Inflation
• Reheating and Thermalization, Linear Vs. Non-Linear Relaxation
• Cosmological Moduli and the Post-Inflationary Universe: A Critical Review
• Inflation and the Scale Dependent Spectral Index: Prospects and Strategies
• Robust forecasts on fundamental physics from the foreground-obscured, gravitationally-lensed CMB polarization
• Bayesian Analysis of Inflation II: Model Selection and Constraints on Reheating
• Superconformal Generalization of the Chaotic Inflation Model λϕ^4/4 - ξ/ 2 ϕ^2 R
• Thermalization after/during Reheating
• Non-Gaussian Spikes from Chaotic Billiards in Inflation Preheating
• Constraints on α-attractor inflation and reheating
• Dark Matter Production in Late Time Reheating
• On the reheating stage after inflation
• Dynamics of oscillating scalar field in thermal environment
• Thermalization Process after Inflation and Effective Potential of Scalar Field
• Perturbation, Non-Gaussianity and Reheating in a GB-$\alpha$-Attractor Model
• Slow Roll Reconstruction: Constraints on Inflation from the 3 Year WMAP Dataset
• Nonequilibrium Dynamics of Scalar Fields in a Thermal Bath
• Dissipative Effects on Reheating after Inflation
• Inflationary Imprints on Dark Matter
• Fate of oscillating scalar fields in the thermal bath and their cosmological implications
• Reheating phase diagram for single-field slow-roll inflationary models
• Moduli decay in the hot early Universe
• Sterile neutrino Dark Matter production from scalar decay in a thermal bath
• Minimal but non-minimal inflation and electroweak symmetry breaking
• Can oscillating scalar fields decay into particles with a large thermal mass?
• Modulated Reheating and Large Non-Gaussianity in String Cosmology
• The Boltzmann Equation from Quantum Field Theory
• Classical Statistical Mechanics and Landau Damping
• Theoretical Uncertainties in Inflationary Predictions
• Particle abundance in a thermal plasma: quantum kinetics vs. Boltzmann equation
• Inflection point inflation and reheating
• What can the CMB tell about the microphysics of cosmic reheating?
• Quantifying the reheating temperature of the universe
• Fate of $Z_2$ Symmetric Scalar Field
• Constraining the general reheating phase in the $\alpha$-attractor inflationary cosmology
• Scalar-tensor linear inflation
• Shortcomings of New Parametrizations of Inflation
• Constraining Curvatonic Reheating
• On finite density effects on cosmic reheating and moduli decay and implications for Dark Matter production
• Reheating predictions in Gravity Theories with Derivative Coupling
• Magneto-reheating constraints from curvature perturbations
• Constraints on Kähler moduli inflation from reheating
• Effective Action for Cosmological Scalar Fields at Finite Temperature
• Novel collective excitations in a hot scalar field theory
• Constraints on variations in inflaton decay rate from modulated preheating
• Cosmological Particle Decays at Finite Temperature
• Deriving super-horizon curvature perturbations from the dynamics of preheating

Cited by in corpus (42)

• Sterile Neutrino Dark Matter
• Decoding the phases of early and late time reheating through imprints on primordial gravitational waves
• Gravitational reheating
• BICEP/Keck Constraints on Attractor Models of Inflation and Reheating
• WIMPs, FIMPs, and Inflaton phenomenology via reheating, CMB and $\Delta N_{eff}$
• Superheavy scalar dark matter from gravitational particle production in $\alpha$-attractor models of inflation
• Connecting CMB anisotropy and cold dark matter phenomenology via reheating
• (P)reheating after minimal Plateau Inflation and constraints from CMB
• Reheating in Models with Non-minimal Coupling in metric and Palatini formalisms
• On Inflationary Scale, Reheating Scale and Pre-BBN Cosmology with Scalar Fields
• Inflaton phenomenology via reheating in light of primordial gravitational waves and the latest BICEP/$Keck$ data
• Accounting for the time evolution of the equation of state parameter during reheating
• Inflationary magnetogenesis with reheating phase from higher curvature coupling
• Two phase reheating: CMB constraints on inflaton and dark matter phenomenology
• Confronting Dark Matter Freeze-In during Reheating with Constraints from Inflation
• Inflation and Reheating in f(R,h) theory formulated in the Palatini formalism
• Measuring the Inflaton Coupling in the CMB
• Effective Theory of Inflationary Magnetogenesis and Constraints on Reheating
• Oscillating scalar dissipating in a medium
• Reheating Constraints on Inflaton, Dark Matter: Swampland Conjecture
• Quartic inflation and radiative corrections with non-minimal coupling
• Primordial black hole versus inflaton
• LiteBIRD and CMB-S4 Sensitivities to Reheating in Plateau Models of Inflation
• Enhanced primordial gravitational waves from a stiff post-inflationary era due to an oscillating inflaton
• Energy Density, Temperature and Entropy Dynamics in Perturbative Reheating
• Variable Inflaton Equation of State and Reheating
• Connecting Cosmic Inflation to Particle Physics with LiteBIRD, CMB-S4, EUCLID and SKA
• On Sphaleron Heating in the Presence of Fermions
• Measuring inflaton couplings via dark radiation as $\Delta N_{\mathrm{eff}}$ in CMB
• Probing Reheating Phase via Non-Helical Magnetogenesis and Secondary Gravitational Waves
• Primordial cosmic complexity and effects of reheating
• Multi-messenger FIMP
• Gravitational Wave Signatures of Primordial Black Hole Reheating in Upcoming Interferometry Missions
• Revisiting Witten-O'Raifeartaigh Inflation for a Non-minimally Coupled Scalar Field
• Equation of state during (p)reheating with trilinear interactions
• Dynamics of scalar fields in an expanding/contracting cosmos at finite temperature
• (P)reheating Effects of the Kähler Moduli Inflation I Model
• ACT DR6 Insights on the Inflationary Attractor models and Reheating
• Quintessential Inflation in Palatini $F(R,X)$ gravity
• Inflationary $\alpha$-Attractor From Type IIB/F Theory
• Leptogenesis and neutrino mass with one right-handed neutrino and Higgs inflaton
• AliCPT Sensitivity to Cosmic Reheating