Long-short wavelength mode coupling tightens primordial black hole constraints

  title={Long-short wavelength mode coupling tightens primordial black hole constraints},
  author={Sam Young and Christian T. Byrnes},
  journal={Physical Review D},
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… 

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