The cosmological analysis of the SDSS/BOSS data from the Effective Field Theory of LargeScale Structure
Abstract
The Effective Field Theory of LargeScale Structure is a formalism that allows us to predict the clustering of Cosmological LargeScale Structure in the mildly nonlinear regime in an accurate and reliable way. After validating our technique against several sets of numerical simulations, we perform the analysis for the cosmological parameters of the DR12 BOSS data. We assume ΛCDM, a fixed value of the baryon/darkmatter ratio, Ω_{b}/Ω_{c}, and of the tilt of the primordial power spectrum, n_{s}, and no significant input from numerical simulations. By using the oneloop power spectrum multipoles, we measure the primordial amplitude of the power spectrum, A_{s}, the abundance of matter, Ω_{m}, and the Hubble parameter, H_{0}, {to about 13%, 3.2% and 3.2% respectively, obtaining ln (10^{10}A_{s})=2.72± 0.13, 0Ω_{m}=0.309± 0.01, H_{0}=68.5± 2.2 km/(s Mpc) at 68% confidence level. If we then add a CMB prior on the sound horizon, the error bar on H_{0} is reduced to 1.6%.} These results are a substantial qualitative and quantitative improvement with respect to former analyses, and suggest that the EFTofLSS is a powerful instrument to extract cosmological information from LargeScale Structure.
 Publication:

Journal of Cosmology and Astroparticle Physics
 Pub Date:
 May 2020
 DOI:
 10.1088/14757516/2020/05/005
 arXiv:
 arXiv:1909.05271
 Bibcode:
 2020JCAP...05..005D
 Keywords:

 Astrophysics  Cosmology and Nongalactic Astrophysics;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 78 pages, 27 figures