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.

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

References in corpus (17)

• Matter and Antimatter in the Universe
• The Unity of Cosmological Attractors
• The Sphaleron Rate in the Minimal Standard 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
• Inflation and the Scale Dependent Spectral Index: Prospects and Strategies
• Non-Gaussian Spikes from Chaotic Billiards in Inflation Preheating
• Dynamics of oscillating scalar field in thermal environment
• Perturbation, Non-Gaussianity and Reheating in a GB-$\alpha$-Attractor Model
• Dissipative Effects on Reheating after Inflation
• Moduli decay in the hot early Universe
• Constraining the general reheating phase in the $\alpha$-attractor inflationary cosmology
• Shortcomings of New Parametrizations of Inflation
• On finite density effects on cosmic reheating and moduli decay and implications for Dark Matter production
• Reheating predictions in Gravity Theories with Derivative Coupling
• Constraints on Kähler moduli inflation from reheating

Cited by in corpus (31)

• 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
• Reheating in Models with Non-minimal Coupling in metric and Palatini formalisms
• Inflaton phenomenology via reheating in light of primordial gravitational waves and the latest BICEP/$Keck$ data
• Inflationary magnetogenesis with reheating phase from higher curvature coupling
• Confronting Dark Matter Freeze-In during Reheating with Constraints from Inflation
• Effective Theory of Inflationary Magnetogenesis and Constraints on Reheating
• Reheating Constraints on Inflaton, Dark Matter: Swampland Conjecture
• Oscillating scalar dissipating in a medium
• 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
• 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
• ACT DR6 Insights on the Inflationary Attractor models and Reheating
• (P)reheating Effects of the Kähler Moduli Inflation I Model
• Inflationary $\alpha$-Attractor From Type IIB/F Theory
• Quintessential Inflation in Palatini $F(R,X)$ gravity
• Leptogenesis and neutrino mass with one right-handed neutrino and Higgs inflaton
• AliCPT Sensitivity to Cosmic Reheating