Efficient cosmological analysis of the SDSS/BOSS data from the Effective Field Theory of LargeScale Structure
Abstract
The precision of the cosmological data allows us to accurately approximate the predictions for cosmological observables by Taylor expanding up to a low order the dependence on the cosmological parameters around a reference cosmology. By applying this observation to the redshiftspace oneloop galaxy power spectrum of the Effective Field Theory of LargeScale Structure, we analyze the BOSS DR12 data by scanning over all the parameters of ΛCDM cosmology with massive neutrinos. We impose several sets of priors, the widest of which is just a Big Bang Nucleosynthesis prior on the current fractional energy density of baryons, Ω_{b} h^{2}, and a bound on the sum of neutrino masses to be less than 0.9 eV. In this case we measure the primordial amplitude of the power spectrum, A_{s}, the abundance of matter, Ω_{m}, the Hubble parameter, H_{0}, and the tilt of the primordial power spectrum, n_{s}, to about 19%, 5.7%, 2.2% and 7.3% respectively, obtaining ln (10^{10}A_{s})=2.91± 0.19, Ω_{m}=0.314± 0.018, H_{0}=68.7± 1.5 km/(s Mpc) and n_{s}=0.979± 0.071 at 68% confidence level. A public code is released with this preprint.
 Publication:

Journal of Cosmology and Astroparticle Physics
 Pub Date:
 June 2020
 DOI:
 10.1088/14757516/2020/06/001
 arXiv:
 arXiv:1909.07951
 Bibcode:
 2020JCAP...06..001C
 Keywords:

 Astrophysics  Cosmology and Nongalactic Astrophysics;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 15 + 10 pages, 15 figures. Code publicly available. Removed prior on the tilt, improved presentation and accuracy