A note on Low Energy Effective Theory of Chromo Natural Inflation in the light of BICEP2 results

Abstract

Recent result of BICEP2, revealing a larger value of tensor to scalar ratio (r), has opened up new investigations of the in ationary models to fit the experimental data. The experiment needs to reconfirm the results, specifically the consistency between Planck and BICEP2. On the other hand, the combined analysis of Planck and BICEP2 B, including the dust polarization uncertainty, brings down the upper limit on r. In this note, we reexamine the low energy effective theory of Chromo Natural In ation model and its generalization in view of such observational data. We find that the parameter space of the model admits a large value of r as well as other cosmological observables consistent with data.

Published version

References in corpus (3)

• Monodromy in the CMB: Gravity Waves and String Inflation
• Large Nongaussianity in Axion Inflation
• Chern-Simons EM-flation

Cited by in corpus (5)

• Primordial Gravitational Waves from Axion-Gauge Fields Dynamics
• Entangled de Sitter from Stringy Axionic Bell pair I: An analysis using Bunch Davies vacuum
• Warm Inflation in $f(R,T)$ gravity
• Effect of Dissipation on Warm Chromo-Natural Inflation
• Perturbative limits on axion-SU(2) gauge dynamics during inflation from the energy density of spin-2 particles