Compensation for large tensor modes with iso-curvature perturbations in CMB anisotropies

Abstract

Recently, BICEP2 has reported the large tensor-to-scalar ratio $r=0.2_{-0.05}^{+0.07}$ from the observation of the cosmic microwave background (CMB) B-mode at degree-scales. Since tensor modes induce not only CMB B-mode but also the temperature fluctuations on large scales, to realize the consistent temperature fluctuations with the Planck result we should consider suppression of scalar perturbations on corresponding large scales. To realize such a suppression, we consider anti-correlated iso-curvature perturbations which could be realized in the simple curvaton model.

10 pages, 1 figure, accepted for publication in JCAP

References in corpus (40)

• Planck 2013 results. XVI. Cosmological parameters
• BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
• Generating the curvature perturbation without an inflaton
• Planck 2013 results. XXII. Constraints on inflation
• Adiabatic CMB perturbations in pre-big bang string cosmology
• Effects of Cosmological Moduli Fields on Cosmic Microwave Background
• The primordial density perturbation in the curvaton scenario
• BICEP2 II: Experiment and Three-Year Data Set
• Cosmic Density Perturbations from Late-Decaying Scalar Condensations
• Relic Neutrinos, thermal axions and cosmology in early 2014
• Axion cold dark matter in view of BICEP2 results
• Non-Bunch-Davies Initial State Reconciles Chaotic Models with BICEP and Planck
• The CDM isocurvature perturbation in the curvaton scenario
• Tensor Detection Severely Constrains Axion Dark Matter
• Correlated isocurvature perturbations from mixed inflaton-curvaton decay
• Solving the Tension between High-Scale Inflation and Axion Isocurvature Perturbations
• Closed String Thermodynamics and a Blue Tensor Spectrum
• Isocurvature, non-gaussianity and the curvaton model
• Compensated Isocurvature Perturbations and the Cosmic Microwave Background
• Can topological defects mimic the BICEP2 B-mode signal?
• Forecasted 21 cm constraints on compensated isocurvature perturbations
• Baryons do trace dark matter 380,000 years after the big bang: Search for compensated isocurvature perturbations with WMAP 9-year data
• Remarks about the Tensor Mode Detection by the BICEP2 Collaboration and the Super-Planckian Excursions of the Inflaton Field
• On Possible Variation in the Cosmological Baryon Fraction
• Discovery of Large Scale Tensor Mode and Chaotic Inflation in Supergravity
• Non-Gaussianity and Baryonic Isocurvature Fluctuations in the Curvaton Scenario
• Running Spectral Index from Large-field Inflation with Modulations Revisited
• Comprehensive analysis of the simplest curvaton model
• Higgs Chaotic Inflation and the Primordial B-mode Polarization Discovered by BICEP2
• Dynamical Chaotic Inflation in the Light of BICEP2
• Reconstructing inflationary potential from BICEP2 and running of tensor modes
• Cosmological Constraints on Isocurvature and Tensor Perturbations
• Constraints on scalar and tensor perturbations in phenomenological and two-field inflation models: Bayesian evidences for primordial isocurvature and tensor modes
• Differentiating CDM and Baryon Isocurvature Models with 21 cm Fluctuations
• S-dual Inflation: BICEP2 data without unlikeliness
• Constraints on neutrino density and velocity isocurvature modes from WMAP-9 data
• Reconstructing the Local Potential of Inflation with BICEP2 data
• Constraints on moduli cosmology from the production of dark matter and baryon isocurvature fluctuations
• Do Mixed States save Effective Field Theory from BICEP?
• Hint of relic gravitational waves in the Planck and WMAP data

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