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Compressing bispectra and exploring trispectra: probing the non-Gaussian component of the density field

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If you have a question about this talk, please contact Sunny Vagnozzi .

Beyond standard power spectrum analyses of large scale structure (LSS) clustering data-sets, higher order statistics provide a unique window on the non-linear evolution of the galaxy/matter density field, both due to gravitational collapse and potentially also due to primordial non-Gaussianity. In the first part of the talk I will show how to efficiently compress the bispectrum data-vector (lowest higher order statistic) in order to fully exploit its potential to improve cosmological parameters constraints. I will then present the first steps towards including the trispectrum in LSS analyses and discuss its added benefit with respect to power spectrum and bispectrum.

This talk is part of the Cosmology Lunch series.

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