Robust μ-distortion constraints on primordial supermassive black holes from cubic (gNL) non-Gaussian perturbations
arXiv:2505.08442 · doi:10.1088/1475-7516/2025/07/079
Abstract
We make the first calculation of the spectral distortion constraints on the primordial curvature power spectrum in the limit of large cubic non-Gaussianity. This calculation involves computing a 2-loop integral, which we perform analytically. Despite being non-perturbatively non-Gaussian, we show that the constraints only change significantly from the case of Gaussian perturbations in the high-k tail, where spectral distortions become weak. We conclude that generating primordial supermassive black holes requires even more extreme forms of non-Gaussianity. We also argue why the mu-distortion constraint is unlikely to significantly change even in the presence of more extreme local non-Gaussianity.
arXiv comment12 pages plus appendices, 6 figures. v2, updated to match the published version
References in corpus (46)
- The Cosmic Microwave Background Spectrum from the Full COBE/FIRAS Data Set
- Density Perturbations and Black Hole Formation in Hybrid Inflation
- Primordial black holes from single field models of inflation
- Massive Primordial Black Holes from Hybrid Inflation as Dark Matter and the seeds of Galaxies
- The evolution of CMB spectral distortions in the early Universe
- Probing the inflaton: Small-scale power spectrum constraints from measurements of the CMB energy spectrum
- CMB at 2x2 order: the dissipation of primordial acoustic waves and the observable part of the associated energy release
- Cosmic Conundra Explained by Thermal History and Primordial Black Holes
- Detecting a small perturbation through its non-Gaussianity
- Primordial Black Holes from a tiny bump/dip in the Inflaton potential
- Primordial black holes as a tool for constraining non-Gaussianity
- The Ineludible non-Gaussianity of the Primordial Black Hole Abundance
- Primordial black hole formation and abundance: contribution from the non-linear relation between the density and curvature perturbation
- Testing scenarios of primordial black holes being the seeds of supermassive black holes by ultracompact minihalos and CMB -distortions
- Primordial non-gaussianity up to all orders: theoretical aspects and implications for primordial black hole models
- Limits on primordial black holes from distortions in cosmic microwave background
- Silk damping at a redshift of a billion: a new limit on small-scale adiabatic perturbations
- Moments and Absolute Moments of the Normal Distribution
- Primordial black holes as dark matter and gravitational waves from single-field polynomial inflation
- The power spectrum on small scales: Robust constraints and comparing PBH methodologies
- Non-perturbative non-Gaussianity and primordial black holes
- The synergy between CMB spectral distortions and anisotropies
- Supermassive black holes formed by direct collapse of inflationary perturbations
- Mixing of blackbodies: entropy production and dissipation of sound waves in the early Universe
- Diagrammatic approach to non-Gaussianity from inflation
- Multi-messenger Probes of Inflationary Fluctuations and Primordial Black Holes
- A Hydrodynamical Approach to CMB mu-distortions
- Primordial black holes from single-field inflation: a fine-tuning audit
- Primordial black hole formation during the QCD phase transition: threshold, mass distribution and abundance
- CMB Spectral Distortions: Status and Prospects
- The long-short wavelength mode coupling tightens primordial black hole constraints
- Constraints on small-scale primordial power by annihilation signals from extragalactic dark matter minihalos
- A non-Gaussian landscape
- Statistical Naturalness and non-Gaussianity in a Finite Universe
- Extreme scenarios: the tightest possible constraints on the power spectrum due to primordial black holes
- Production of Primordial Black Holes via Single Field Inflation and Observational Constraints
- Primordial magnetic field generation via primordial black hole disks
- Quest for CMB spectral distortions to probe the scalar-induced gravitational wave background interpretation of pulsar timing array data
- Growth of Massive Black-Holes in FFB Galaxies at Cosmic Dawn
- Mechanisms for producing Primordial Black Holes from Inflationary Models Beyond Fine-Tuning
- Constraining the impact of standard model phase transitions on primordial black holes
- BISOU: a balloon project to measure the CMB spectral distortions
- Generating large primordial fluctuations in single-field inflation for PBH formation
- Supermassive primordial black holes for the GHZ9 and UHZ1 observed by the JWST
- CMB Spectral Distortions: A Multimessenger Probe of the Primordial Universe
- Isotropy, anisotropies and non-Gaussianity in the scalar-induced gravitational-wave background: diagrammatic approach for primordial non-Gaussianity up to arbitrary order