BOSS full-shape analysis from the EFTofLSS with exact time dependence

Abstract

We re-analyze the full shape of BOSS galaxy two-point function from the Effective-Field Theory of Large-Scale Structure at the one loop within $\Lambda$CDM with massive neutrinos using a big bang nucleosynthesis (BBN) prior, removing the Einstein-de Sitter (EdS) approximation in the time dependence of the loop, and, properly accounting for the redshift selection over the BOSS samples instead of assuming an effective redshift. We constrain, at $68\%$-confidence level (CL), the present-day matter fraction to ${\Omega }_m=0.322\pm 0.018$, the Hubble constant to $H_0=69.1\pm 0.14$ (km/s)/Mpc, the $\log$-amplitude of the primordial spectrum to $\ln (10^{10}{A}_s)=2.97\pm 0.25$, the spectral tilt to $n_s=0.938\pm 0.082$, and bound the total neutrino mass to $<1.1$ at $95\%$-CL. We find no significant shift in the posteriors of the cosmological parameters due to the EdS approximation, but a marginal difference in $\ln (10^{10}{A}_s)$ due to the effective redshift approximation of about $0.4\sigma$, where $\sigma$ is the $68\%$-confidence interval. Regarding the EdS approximation, we check that the same conclusion holds on simulations of volume like DESI in $\Lambda$CDM and $w$CDM, with a BBN prior. In contrast, for an approximate, effective redshift, to be assumed, we advocate systematic assessments on redshift selection for ongoing and future large-volume surveys.

18+22 pages, 7 figures. v2: 20+22 pages, 7 figures, matches JCAP published version, references added, presentation improved

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Cited by in corpus (8)

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• Updated constraints from the effective field theory analysis of BOSS power spectrum on Early Dark Energy
• Consistency of effective field theory analyses of the BOSS power spectrum
• Cosmological inference from the EFTofLSS: the eBOSS QSO full-shape analysis
• The one-loop bispectrum of galaxies in redshift space from the Effective Field Theory of Large-Scale Structure
• Interacting dark energy from the joint analysis of the power spectrum and bispectrum multipoles with the EFTofLSS
• A multitracer analysis for the eBOSS galaxy sample based on the effective field theory of large-scale structure
• Cosmological constraints from the EFT power spectrum and tree-level bispectrum of 21cm intensity maps