B-mode Targets

Abstract

The CMB-S4 Science Book, Astro2020 Science White Paper on gravitational waves, and PICO report contain an extensive discussion of many ongoing and planned efforts in the search for gravitational waved produced by inflation. Here we give a short executive summary of the results obtained in our recent papers, which specify the simplest available inflationary models providing physically motivated targets for these searches. Our conclusions are specific for the $10^{-3}\lesssim r\lesssim 10^{-2}$ range, where we present the B-mode benchmarks of the U-duality symmetric class of $\alpha$-attractors, and for $r\lesssim 10^{-3}$, where we present B-mode targets, for which the future precision measurements of $n_s$ will be decisive. We show that a combination of the simplest $\alpha$-attractors and KKLTI models of D-brane inflation covers most of the area favored by Planck 2018.

4 pages 5 figures, comments and references added

References in corpus (4)

• The Standard Model Higgs boson as the inflaton
• Monodromy in the CMB: Gravity Waves and String Inflation
• PICO: Probe of Inflation and Cosmic Origins
• Probing the origin of our Universe through cosmic microwave background constraints on gravitational waves

Cited by in corpus (23)

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• Polynomial $\alpha$-attractors
• Quintessential $\alpha$-attractor inflation: forecasts for Stage IV galaxy surveys
• Back to the features: assessing the discriminating power of future CMB missions on inflationary models
• $\alpha$-attractor inflation: Models and predictions
• Chasing cosmic inflation: constraints for inflationary models and reheating insights
• The CCAT-Prime Submillimeter Observatory
• Testing for spectral index variations in polarised CMB foregrounds
• Natural Inflation with Exponentially Small Tensor-To-Scalar Ratio
• Flattened Axion Monodromy Beyond Two Derivatives
• Constraining the quintessential $\alpha$-attractor inflation through dynamical horizon exit method
• The Inflationary Quartic Hilltop Model in a Modified Gravity and Its Comparison with the Observations
• $F(\varphi )T$-Gravity and Inflationary Natural Model
• Observational Restrictions and Slow-Roll D-brane Inflation in the Special $F(\varphi ,T)$ Gravity
• Possible relationship between initial conditions for inflation and past geodesic incompleteness of the inflationary spacetime
• Complementary signatures of $\alpha -$attractor inflation in CMB and cosmic string Gravitational Waves
• Supersymmetric Horizons at the Edge of Effective Field Theory
• A novel way of constraining the $\alpha$-attractor chaotic inflation through Planck data
• Inflationary $\alpha$-Attractor From Type IIB/F Theory
• Modified Gravity Framework for the Woods-Saxon Inflation: Theoretical Foundations and Observational Constraints