Seminars
# The Cosmological Analysis of the SDSS/BOSS data from the Effective Field Theory of Large-Scale Structure

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Europe/Rome

Aula 281 (Dipartimento di Fisica e Astronomia, Firenze)
#### Aula 281 (Dipartimento di Fisica e Astronomia, Firenze)

Description

The Effective Field Theory of Large-Scale Structure (EFTofLSS) is a formalism that allows us to predict the clustering of Cosmological Large-Scale Structure in the mildly non-linear 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 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, Ωbh2, 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, As, the abundance of matter, Ωm, the Hubble parameter, H0, and the tilt of the primordial power spectrum, ns, to about 19%, 5.7%, 2.2% and 7.3% respectively, obtaining ln(1010As)=2.91±0.19, Ωm=0.314±0.018, H0=68.7±1.5 km/(s Mpc) and ns=0.979±0.071 at 68% confidence level.