Inflationary Birefringence and Baryogenesis

Abstract

A decade ago, the first leptogenesis model based on inflation was proposed, where the complex phase of the inflaton field carries lepton number. If the inflaton field is an axion, it can couple to gravitational waves and gauge fields via. Chern-Simons invariants. Due to these couplings, birefringent gravitational and gauge primordial perturbations are created during inflation to generate a lepton asymmetry, establishing a possible connection between non-vanishing TB-parity violating polarization cross-correlations and leptogenesis. We also discuss the prospect for a subset of these models can directly source circular (V-mode) polarization in the CMB.

7 Pages, CPR 2015 Conference Proceedings

References in corpus (6)

• Anomalous CMB polarization and gravitational chirality
• Hypermagnetic Fields and Baryon Asymmetry from Pseudoscalar Inflation
• Parity-violating and anisotropic correlations in pseudoscalar inflation
• Chiral Gravity Waves and Leptogenesis in Inflationary Models with non-Abelian Gauge Fields
• Hypermagnetic Baryogenesis
• Gravitational-Wave Mediated Preheating

Cited by in corpus (12)

• Probing Parity-Violation with the Four-Point Correlation Function of BOSS Galaxies
• Parity breaking signatures from a Chern-Simons coupling during inflation: the case of non-Gaussian gravitational waves
• Measuring chiral gravitational waves in Chern-Simons gravity with CMB bispectra
• Searching for Anisotropic Cosmic Birefringence with Polarization Data from SPTpol
• Colliding Ghosts: Constraining Inflation with the Parity-Odd Galaxy Four-Point Function
• Baryon asymmetry from Barrow entropy: theoretical predictions and observational constraints
• Future CMB constraints on cosmic birefringence and implications for fundamental physics
• Tensor non-Gaussianity in chiral scalar-tensor theories of gravity
• Quantum-Ordering Ambiguities in Weak Chern-Simons 4D Gravity and Metastability of the Condensate-Induced Inflation
• On spacetime structure and electrodynamics
• Inflation with the Chern-Simons term in the Palatini formulation
• Bridging inflation and reheating: chiral gravitational waves from aHz to GHz