Matter power spectrum measurements show strong non-Gaussian skewness on nonlinear scales at low redshift, driven by pentaspectrum contributions and amplified by survey geometry and integral constraint.
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Euclid preparation: LXXXVII. Non-Gaussianity of 2-point statistics likelihood: Precise analysis of the matter power spectrum distribution
Matter power spectrum measurements show strong non-Gaussian skewness on nonlinear scales at low redshift, driven by pentaspectrum contributions and amplified by survey geometry and integral constraint.