# Long-short wavelength mode coupling tightens primordial black hole constraints

@article{Young2014LongshortWM, title={Long-short wavelength mode coupling tightens primordial black hole constraints}, author={Sam Young and Christian T. Byrnes}, journal={Physical Review D}, year={2014}, volume={91} }

The effects of non-Gaussianity on the constraints on the primordial curvature perturbation power spectrum from primordial black holes (PBHs) are considered. We extend previous analyses to include the effects of coupling between the modes of the horizon scale at the time the PBH forms and superhorizon modes. We consider terms of up to third order in the Gaussian perturbation. For the weakest constraints on the abundance of PBHs in the early universe (corresponding to a fractional energy density…

## 29 Citations

### Peaks and primordial black holes: the effect of non-Gaussianity

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2022

In light of recent developments in the field, we re-evaluate the effect of local-type non-Gaussianity on the primordial black hole (PBH) abundance (and consequently, upon constraints on the…

### Steepest growth of the power spectrum and primordial black holes

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

We derive analytic bounds on the shape of the primordial power spectrum in the context of single-field inflation. In particular, the steepest possible growth has a spectral index of ns − 1 = 4 once…

### Extreme scenarios: the tightest possible constraints on the power spectrum due to primordial black holes

- Physics
- 2017

Observational constraints on the abundance of primordial black holes (PBHs) constrain the allowed amplitude of the primordial power spectrum on both the smallest and the largest ranges of scales,…

### From primordial black holes abundance to primordial curvature power spectrum (and back)

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

In the model where Primordial Black Holes (PBHs) form from large primordial curvature (C) perturbations, i.e., CPBHs, constraints on PBH abundance provide in principle constraints on the primordial…

### Signatures of non-gaussianity in the isocurvature modes of primordial black hole dark matter

- Physics
- 2015

Primordial black holes (PBHs) are black holes which may have formed very early on during the radiation dominated era in the early universe. We present here a method by which the large scale…

### The power spectrum on small scales: robust constraints and comparing PBH methodologies

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2021

We compare primordial black hole (PBH) constraints on the power spectrum and mass distributions using the traditional Press Schechter formalism, peaks theory, and a recently developed version of…

### Primordial black hole formation with non-Gaussian curvature perturbations

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

In the context of transient constant-roll inflation near a local maximum, we derive the non-perturbative field redefinition that relates a Gaussian random field with the true non-Gaussian curvature…

### PBH in single field inflation: the effect of shape dispersion and non-Gaussianities

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2020

Primordial black holes (PBHs) may result from high peaks in a random field of cosmological perturbations. In single field inflationary models, such perturbations can be seeded as the inflaton…

### Constraining the early universe with primordial black holes

- Physics
- 2016

Inflation is the leading candidate to explain the initial conditions for the Universe we see today. It consists of an epoch of accelerated expansion, and regularly solves many problems with the Big…

### Primordial black hole formation and abundance: contribution from the non-linear relation between the density and curvature perturbation

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

The formation and abundance of primordial black holes (PBHs) arising from the curvature perturbation ζ is studied. The non-linear relation between ζ and the density contrast δ means that, even when ζ…

## References

SHOWING 1-10 OF 46 REFERENCES

### Primordial black holes in non-Gaussian regimes

- Physics
- 2013

Primordial black holes (PBHs) can form in the early Universe from the collapse of rare, large density fluctuations. They have never been observed, but this fact is enough to constrain the amplitude…

### Generalised constraints on the curvature perturbation from primordial black holes

- Physics
- 2009

Primordial black holes (PBHs) can form in the early Universe via the collapse of large density perturbations. There are tight constraints on the abundance of PBHs formed due to their gravitational…

### Primordial black holes as a tool for constraining non-Gaussianity

- Physics
- 2012

Primordial Black Holes (PBH's) can form in the early Universe from thecollapse of large density fluctuations. Tight observational limits on theirabundance constrain the amplitude of the primordial…

### Improved constraints on the primordial power spectrum at small scales from ultracompact minihalos

- Physics
- 2012

For a Gaussian spectrum of primordial density fluctuations, ultracompact minihalos (UCMHs) of dark matter are expected to be produced in much greater abundance than, e.g., primordial black holes.…

### Non-Gaussian fluctuations and primordial black holes from inflation

- Physics
- 1997

We explore the role of non-Gaussian fluctuations in primordial black hole (PBH) formation and show that the standard Gaussian assumption, used in all PBH formation papers to date, is not justified.…

### The double formation of primordial black holes

- Geology
- 2014

Primordial black holes (PBHs) are a useful tool in cosmology to probe primordial inhomogeneities on small scales that reenter the Hubble radius during the radiation dominated epoch. In this paper, a…

### Computations of primordial black-hole formation

- Physics
- 2005

Results are presented from general relativistic numerical computations of primordial black-hole formation during the radiation-dominated era of the universe. Growing-mode perturbations are specified…

### Calculating the mass fraction of primordial black holes

- Physics
- 2014

We reinspect the calculation for the mass fraction of primordial black holes (PBHs) which are formed from primordial perturbations, finding that performing the calculation using the comoving…

### Primordial black holes from temporally enhanced curvature perturbation

- Physics
- 2014

Scalar field with generalized kinetic interactions metamorphoses depending on its field value, ranging from a cosmological constant to stiff matter. We show that such a scalar field can give rise to…

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

- Physics
- 2013

When inflation is driven by a pseudoscalar field χ coupled to vectors as α4χFF˜, this coupling may lead to a copious production of gauge quanta, which in turns induces non-Gaussian and…