Gauge field production in supergravity inflation: Local non-Gaussianity and primordial black holes

2012/12/31 by Andrei Linde, Sander Mooij, Enrico Pajer · 11 citations
Mathematics · Physics and Astronomy · #Astrophysics #Binary black hole #Black Holes and Theoretical Physics #Cosmic microwave background #Cosmology and Gravitation Theories #Field (mathematics) #Gauge (firearms) #Gravitational wave #Inflation (cosmology) #Mathematics #Non-Gaussianity #Particle physics #Physics #Primordial black hole #Primordial fluctuations #Quantum electrodynamics #Quantum mechanics #Relativity and Gravitational Theory #Supergravity #Supersymmetry #Theoretical physics #astro-ph.CO #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevd.87.103506

17 pages, 8 figures

arxiv created 2013/04/27 · openalex publication_date 2013/05/13 · arxiv updated 2013/05/22 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

When inflation is driven by a pseudoscalar field \ensuremathχ coupled to vectors as \frac\ensuremathα4\ensuremathχF\stackrel\texttildelowF, this coupling may lead to a copious production of gauge quanta, which in turns induces non-Gaussian and non-scale-invariant corrections to curvature perturbations. We point out that this mechanism is generically at work in a broad class of inflationary models in supergravity, hence providing them with a rich set of observational predictions. When the gauge fields are massless, significant effects on cosmic microwave background scales emerge only for relatively large \ensuremathα. We show that in this regime, the curvature perturbations produced at the last stages of inflation have a relatively large amplitude that is of the order of the upper bound set by the possible production of primordial black holes by non-Gaussian perturbations. On the other hand, within the supergravity framework described in our paper, the gauge fields can often acquire a mass through a coupling to additional light scalar fields. Perturbations of these fields modulate the duration of inflation, which serves as a source for non-Gaussian perturbations of the metric. In this regime, the bounds from primordial black holes are parametrically satisfied and non-Gaussianity of the local type can be generated at the observationally interesting level f_NL\ensuremath∼O(10).

Citations

• Chaotic hybrid new inflation in supergravity with a running spectral index
• Supersymmetric relics from the big bang
• Superconformal symmetry, NMSSM, and inflation
• Chaotic inflation
• Generating the curvature perturbation without an inflaton
• Landscape, the Scale of SUSY Breaking, and Inflation
• Number counts and non-Gaussianity
• Shift symmetry and inflation in supergravity
• Formation of primordial black holes from non-Gaussian perturbations produced in a waterfall transition
• Chaotic inflation in Jordan frame supergravity
• Curvature perturbation spectra from waterfall transition, black hole constraints and non-Gaussianity
• Naturally inflating on steep potentials through electromagnetic dissipation
• Natural Chaotic Inflation in Supergravity
• Supergravity chaotic inflation and moduli stabilization

Cited by

• Gravitational leptogenesis in natural inflation
• Induced Gravitational Waves as Cosmic Tracers of Leptogenesis
• Effective Field Theory of Chiral Gravitational Waves
• Gauge-preheating and the end of axion inflation
• A review of axion inflation in the era of Planck
• Relations between canonical and non-canonical inflation
• Primordial GWs from universality classes of pseudo-scalar inflation
• Baryon asymmetry and gravitational waves from pseudoscalar inflation
• Phenomenology of fermion production during axion inflation
• Dynamics of relaxed inflation
• Primordial black holes and lepton flavor violation with scotogenic dark matter

Related

• Gauge Fields and Inflation: Chiral Gravitational Waves, Fluctuations and the Lyth Bound
• Pure Chromo-Natural Inflation: Signatures of Particle Production from Weak to Strong Backreaction
• Large-scale magnetic fields, non-Gaussianity, and gravitational waves from inflation
• CMB Constraints on Natural Inflation with Gauge Field Production
• Primordial black holes and scalar induced gravitational waves from Higgs inflation with non-canonical kinetic term