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2018

Primordial physics from large-scale structure beyond the power spectrum

de Putter, Roland

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We study constraints on primordial mode-coupling from the power spectrum, squeezed-limit bispectrum and collapsed trispectrum of matter and halos.

We describe these statistics in terms of long-wavelength $2$-point functions involving the matter/halo density and position-dependent power spectrum.
This allows us to derive simple, analytic expression for the information content, treating constraints from scale-dependent bias in the halo power spectrum on the same footing as those from higher order statistics.
In particular, we include non-Gaussian covariance due to long-short mode-coupling from non-linear evolution, which manifests itself as long-mode cosmic variance in the position-dependent power spectrum.

Primordial physics from large-scale structure beyond the power spectrum · Around

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