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Updated: May 12, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Statistical naturalness and non-gaussianity in a finite universe
Elliot Nelson1, Sarah Shandera
1Institute for Gravitation and the Cosmos, The Pennsylvania State University, University Park, Pennsylvania 16802, USA. eln121@psu.edu
Abstract:
We study the behavior of n-point functions of the primordial curvature perturbations, assuming our observed Universe is only a subset of a larger space with statistically homogeneous and isotropic perturbations. If the larger space has arbitrary n-point functions in a family of local type non-gaussian statistics, sufficiently biased smaller volumes will have statistics from a "natural" version of that family with moments that are weakly non-gaussian and ordered, regardless of the statistics of the original field. We also describe the effect of this bias on the shape of the bispectrum.
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