Gravitational waves from fermion production during axion inflation

Abstract

We present analytic results for the gravitational wave power spectrum induced in models where the inflaton is coupled to a fermionic pseudocurrent. We show that although such a coupling creates helically polarized fermions, the polarized component of the resulting gravitational waves is parametrically suppressed with respect to the non-polarized one. We also show that the amplitude of the gravitational wave signal associated to this production cannot exceed that generated by the standard mechanism of amplification of vacuum fluctuations. We previously found that this model allows for a regime in which the backreaction of the produced fermions allows for slow-roll inflation even for a steep inflaton potential, and still leads to Gaussian primordial scalar perturbations. The present analysis shows that this regime also results in a gravitational wave signal compatible with the current bounds.

arXiv comment29 pages, 2 figures

References in corpus (53)

• Planck 2015 results. XIII. Cosmological parameters
• Non-Gaussian features of primordial fluctuations in single field inflationary models
• The Dynamics of General Relativity
• A Joint Analysis of BICEP2/Keck Array and Planck Data
• Observational Signatures and Non-Gaussianities of General Single Field Inflation
• Quantum Contributions to Cosmological Correlations
• Monodromy in the CMB: Gravity Waves and String Inflation
• Gravity Waves and Linear Inflation from Axion Monodromy
• BICEP2 / Keck Array VI: Improved Constraints On Cosmology and Foregrounds When Adding 95 GHz Data From Keck Array
• Planck 2013 Results. XXIV. Constraints on primordial non-Gaussianity
• A Natural Framework for Chaotic Inflation
• Large Nongaussianity in Axion Inflation
• Gauge Field Production in Axion Inflation: Consequences for Monodromy, non-Gaussianity in the CMB, and Gravitational Waves at Interferometers
• Naturally inflating on steep potentials through electromagnetic dissipation
• Parity violation in the Cosmic Microwave Background from a pseudoscalar inflaton
• N-flationary magnetic fields
• Phenomenology of a Pseudo-Scalar Inflaton: Naturally Large Nongaussianity
• An Ignoble Approach to Large Field Inflation
• Gravitational waves at interferometer scales and primordial black holes in axion inflation
• A review of Axion Inflation in the era of Planck
• Gauge field production in SUGRA inflation: local non-Gaussianity and primordial black holes
• Gauge-preheating and the end of axion inflation
• Matter Creation via Vacuum Fluctuations in the Early Universe and Observed Ultra-High Energy Cosmic Ray Events
• Magnetogenesis from axion inflation
• Gauge Fields and Inflation: Chiral Gravitational Waves, Fluctuations and the Lyth Bound
• Perturbations in Chromo-Natural Inflation
• Adding helicity to inflationary magnetogenesis
• Gravitational waves from gauge preheating
• One-loop corrections to a scalar field during inflation
• Consistent generation of magnetic fields in axion inflation models
• Gauge Field and Fermion Production during Axion Inflation
• An inflationary model with small scalar and large tensor nongaussianities
• Fermion production during and after axion inflation
• Aligned Natural Inflation in String Theory
• Axion inflation with gauge field production and primordial black holes
• Parity violation in the CMB bispectrum by a rolling pseudoscalar
• Lattice formulation of axion inflation. Application to preheating
• Gravitational Fermion Production in Inflationary Cosmology
• CMB Bispectrum from Primordial Scalar, Vector and Tensor non-Gaussianities
• Phenomenology of fermion production during axion inflation
• A New Angle on Chaotic Inflation
• Thermalized Axion Inflation
• One-loop graviton corrections to the curvature perturbation from inflation
• Leptogenesis from left-handed neutrino production during axion inflation
• Trajectories with suppressed tensor-to-scalar ratio in Aligned Natural Inflation
• Stochastic Background of Gravitational Waves from Fermions -- Theory and Applications
• Inflationary magnetogenesis with added helicity: constraints from non-gaussianities
• Monodromy inflation at strong coupling: $4\pi$ in the sky
• Feeding your Inflaton: Non-Gaussian Signatures of Interaction Structure
• Thermalized axion inflation: natural and monomial inflation with small $r$
• Chiral Gravitational Waves from Chiral Fermions
• Group Theoretic Approach to Fermion Production
• Supersymmetric Inflation from the Fifth Dimension

Cited by in corpus (14)

• Chiral Anomaly, Schwinger Effect, Euler-Heisenberg Lagrangian, and application to axion inflation
• Primordial black holes as dark matter and gravitational waves from bumpy axion inflation
• Chiral effects in astrophysics and cosmology
• Energy-momentum tensor and helicity for gauge fields coupled to a pseudo-scalar inflaton
• New constraints on axion-gauge field dynamics during inflation from $Planck$ and BICEP/Keck data sets
• Minimal Supergravity Inflation without Slow Gravitino
• Renormalization in gravitational leptogenesis with pseudo-scalar-tensor coupling
• Lattice simulations of axion-U(1) inflation: gravitational waves, magnetic fields, and scalar statistics
• Magnetogenesis from a rotating scalar: à la scalar chiral magnetic effect
• Production and backreaction of massive fermions during axion inflation with non-Abelian gauge fields
• Reviving chaotic inflation with fermion production: a supergravity model
• Axion anomalies
• Non-perturbative approach for scalar particle production in Higgs-$R^2$ inflation
• Twisting inflation to sub-Planckian axion decay constants