Fibre inflation and precision CMB data

Abstract

Generic features of models of inflation obtained from string compactifications are the correlations between the model parameters and the postinflationary evolution of the universe. Thus, the postinflationary evolution depends on the inflationary model parameters and accurate inflationary predictions require that this be incorporated in the evolution of the primordial spectrum. The fibre inflation model is a promising model of inflation constructed in type IIB string theory. This model has two interesting features in its postinflationary evolution. The reheating temperature of the model is directly correlated with the model parameters. The model also necessarily predicts some dark radiation, which can be sizable for certain choices of discrete parameters in the model. We analyze this model in detail using publicly available codes - ModeChord and CosmoMC with the latest Planck+BICEP2/Keck array data to constrain the model parameters and $N_{\mathrm{pivot}}$ (the number of $e$-foldings between horizon exit of the CMB pivot mode and the end of inflation). We also carry out the same analysis using the publicly available code Cobaya. We find the results of both the analysis to be in agreement. Our analysis provides the basic methods necessary to extract precise inflationary prediction in string models incorporating correlations between model parameters and postinflationary evolution.

arXiv comment14 pages, 4 figures; new analysis added, minor changes; matches the version published in PRD

References in corpus (66)

• Efficient Computation of CMB anisotropies in closed FRW models
• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• MultiNest: an efficient and robust Bayesian inference tool for cosmology and particle physics
• Hierarchies from Fluxes in String Compactifications
• Multimodal nested sampling: an efficient and robust alternative to MCMC methods for astronomical data analysis
• On the Geometry of the String Landscape and the Swampland
• Encyclopaedia Inflationaris
• Systematics of Moduli Stabilisation in Calabi-Yau Flux Compactifications
• Big Bang Nucleosynthesis: 2015
• Importance Nested Sampling and the MultiNest Algorithm
• A Joint Analysis of BICEP2/Keck Array and Planck Data
• The Swampland: Introduction and Review
• BICEP2 / Keck Array VI: Improved Constraints On Cosmology and Foregrounds When Adding 95 GHz Data From Keck Array
• How long before the end of inflation were observable perturbations produced?
• The String Landscape and the Swampland
• Large-Volume Flux Compactifications: Moduli Spectrum and D3/D7 Soft Supersymmetry Breaking
• Mission design of LiteBIRD
• CMB-S4 Science Book, First Edition
• First CMB Constraints on the Inflationary Reheating Temperature
• The Best Inflationary Models After Planck
• Trans-Planckian Censorship and the Swampland
• Planck 2015 results. X. Diffuse component separation: Foreground maps
• Kahler Moduli Inflation
• Inflation after WMAP3: Confronting the Slow-Roll and Exact Power Spectra with CMB Data
• Fibre Inflation: Observable Gravity Waves from IIB String Compactifications
• Non-minimal Inflationary Attractors
• Trans-Planckian Censorship and Inflationary Cosmology
• Non-thermal Dark Matter and the Moduli Problem in String Frameworks
• Gaugino Condensates and D-terms from D7-branes
• Observing the Inflationary Reheating
• Dark Radiation in LARGE Volume Models
• D-terms and F-terms from D7-brane fluxes
• Exploring Cosmic Origins with CORE: Inflation
• Dark Radiation and Dark Matter in Large Volume Compactifications
• Bayesian Analysis of Inflation: Parameter Estimation for Single Field Models
• Oscillons from String Moduli
• Hunting Down the Best Model of Inflation with Bayesian Evidence
• Robust Inflation from Fibrous Strings
• Sequestered de Sitter String Scenarios: Soft-terms
• Global Embedding of Fibre Inflation Models
• Moduli Vacuum Misalignment and Precise Predictions in String Inflation
• ${\alpha }^{\prime }$ Inflation: Moduli Stabilisation and Observable Tensors from Higher Derivatives
• Global Orientifolded Quivers with Inflation
• Information Gain on Reheating: the One Bit Milestone
• Supersymmetry, Nonthermal Dark Matter and Precision Cosmology
• Modulated Reheating and Large Non-Gaussianity in String Cosmology
• Chiral Global Embedding of Fibre Inflation Models
• Higher derivatives in Type II and M-theory on Calabi-Yau threefolds
• Dark Radiation predictions from general Large Volume Scenarios
• Fibre Inflation and $\alpha$-attractors
• Reheating and Dark Radiation after Fibre Inflation
• Fitting string inflation to real cosmological data: the Fibre Inflation case
• Inflationary Constraints on Late Time Modulus Dominated Cosmology
• Constraining Non-thermal Dark Matter by CMB
• Dark Radiation in Anisotropic LARGE Volume Compactifications
• A geometrical instability for ultra-light fields during inflation?
• General Analysis of Dark Radiation in Sequestered String Models
• Fibre Inflation and Reheating
• Cosmology in the presence of multiple light moduli
• Inflationary Predictions and Moduli Masses
• New observational limits on dark radiation in brane-world cosmology
• Confronting Kähler moduli inflation with CMB data
• Limits on Brane-World and Particle Dark Radiation from Big Bang Nucleosynthesis and the CMB
• Energy Density, Temperature and Entropy Dynamics in Perturbative Reheating
• The Axiverse induced Dark Radiation Problem
• Reheating and Entropy Perturbations in Fibre Inflation

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• Lower tensor to scalar ratio in a SUGRA motivated inflationary potential
• Chiral global embedding of Fibre Inflation with $\overline{D3}$ uplift
• Global Embedding of Fibre Inflation in Perturbative LVS
• Brane inflation driven by an arctan potential: CMB constraints and Reheating
• Assisted Fibre Inflation in Perturbative LVS
• Generic no-scale inflation inspired from string theory compactifications