Phenomenology of fermion production during axion inflation
arXiv:1803.04501 · doi:10.1088/1475-7516/2018/06/020
Abstract
We study the production of fermions through a derivative coupling with a pseudoscalar inflaton and the effects of the produced fermions on the scalar primordial perturbations. We present analytic results for the modification of the scalar power spectrum due to the produced fermions, and we estimate the amplitude of the non-Gaussianities in the equilateral regime. Remarkably, we find a regime where the effect of the fermions gives the dominant contribution to the scalar spectrum while the amplitude of the bispectrum is small and in agreement with observation. We also note the existence of a regime in which the backreaction of the fermions on the evolution of the zero-mode of the inflaton can lead to inflation even if the potential of the inflaton is steep and does not satisfy the slow-roll conditions.
arXiv comment48 pages, 9 figures, minor changes, matches published version; v3: added one subsection on spectral index, improved constraints leading to larger parameter space in figure 5, and minor changes
References in corpus (40)
- Planck 2015 results. XIII. Cosmological parameters
- A Joint Analysis of BICEP2/Keck Array and Planck Data
- 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 2015 results. XVII. Constraints on primordial non-Gaussianity
- Planck 2013 Results. XXIV. Constraints on primordial non-Gaussianity
- Large Nongaussianity in Axion Inflation
- Gauge Field Production in Axion Inflation: Consequences for Monodromy, non-Gaussianity in the CMB, and Gravitational Waves at Interferometers
- Primordial magnetic fields from pseudo-Goldstone bosons
- 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
- 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
- Matter Creation via Vacuum Fluctuations in the Early Universe and Observed Ultra-High Energy Cosmic Ray Events
- Magnetogenesis from axion inflation
- Adding helicity to inflationary magnetogenesis
- Schwinger Effect in 4D de Sitter Space and Constraints on Magnetogenesis in the Early Universe
- Consistent generation of magnetic fields in axion inflation models
- An inflationary model with small scalar and large tensor nongaussianities
- Fermion production during and after axion inflation
- Schwinger effect in de Sitter space
- Axion inflation with gauge field production and primordial black holes
- Parity violation in the CMB bispectrum by a rolling pseudoscalar
- Adiabatic regularization and particle creation for spin one-half fields
- Gravitational Fermion Production in Inflationary Cosmology
- Thermalized Axion Inflation
- On Adiabatic Renormalization of Inflationary Perturbations
- Leptogenesis from left-handed neutrino production during axion inflation
- Trajectories with suppressed tensor-to-scalar ratio in Aligned Natural Inflation
- Inflationary magnetogenesis with added helicity: constraints from non-gaussianities
- Primordial Black Holes Formation from Particle Production during Inflation
- Thermalized axion inflation: natural and monomial inflation with small
- Cosmological magnetic fields from photon coupling to fermions and bosons in inflation
- Chiral Gravitational Waves from Chiral Fermions
- V-mode Polarization in Axion Inflation and Preheating
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- Searches for other vacua II: A new Higgstory at the cosmological collider
- Chiral Anomaly, Schwinger Effect, Euler-Heisenberg Lagrangian, and application to axion inflation
- Baryogenesis from axion inflation
- Primordial black holes as dark matter and gravitational waves from bumpy axion inflation
- The Scalar Chemical Potential in Cosmological Collider Physics
- Lattice Simulations of Axion-U(1) Inflation
- Scale-invariant Helical Magnetic Fields from Inflation
- Wash-In Leptogenesis
- Chemical-Potential-Assisted Particle Production in FRW Spacetimes
- Dark QCD Matters
- Production and Backreaction of Fermions from Axion- Gauge Fields during Inflation
- Chiral Gravitational Waves Produced in a Helical Magnetogenesis Model
- Scalar field couplings to quadratic curvature and decay into gravitons
- Energy-momentum tensor and helicity for gauge fields coupled to a pseudo-scalar inflaton
- Axion assisted Schwinger effect
- New constraints on axion-gauge field dynamics during inflation from and BICEP/Keck data sets
- BCS in the Sky: Signatures of Inflationary Fermion Condensation
- The non-linear dynamics of axion inflation: a detailed lattice study
- An Effective Cosmological Collider
- Gravitational waves from fermion production during axion inflation
- Minimal Supergravity Inflation without Slow Gravitino
- Leptoflavorgenesis: baryon asymmetry of the Universe from lepton flavor violation
- Dark Fermions and Spontaneous violation in -axion Inflation
- Renormalization in gravitational leptogenesis with pseudo-scalar-tensor coupling
- Leptogenesis in Cosmological Relaxation with Particle Production
- Starobinsky Inflation and beyond in Einstein-Cartan Gravity
- Magnetogenesis from a rotating scalar: à la scalar chiral magnetic effect
- The Different Regimes of Axion Gauge Field Inflation
- Cosmological Relaxation from Dark Fermion Production
- Non-minimally Coupled Pseudoscalar Inflaton
- Dark Radiation from Inflationary Fluctuations
- Charged Loops at the Cosmological Collider with Chemical Potential
- Production and backreaction of massive fermions during axion inflation with non-Abelian gauge fields
- Group Theoretic Approach to Fermion Production
- Synthetic Gravitational Waves from a Rolling Axion Monodromy
- Reviving chaotic inflation with fermion production: a supergravity model
- Axion anomalies
- Imprints of Schwinger Effect on Primordial Spectra
- QCD preheating: New frontier of baryogenesis
- Transient Acceleration after Non-minimal M-flation Preheating
- Fermion (non)reheating with a quartic inflaton potential