Limits on $w$CDM from the EFTofLSS with the PyBird code

Abstract

We apply the Effective Field Theory of Large-Scale Structure to analyze the $w$CDM cosmological model. By using the full shape of the power spectrum and the BAO post-reconstruction measurements from BOSS, the Supernovae from Pantheon, and a prior from BBN, we set the competitive CMB-independent limit $w=-1.046_{-0.052}^{+0.055}$ at $68\%$ C.L.. After adding the Planck CMB data, we find $w=-1.023_{-0.030}^{+0.033}$ at $68\%$ C.L.. Our results are obtained using PyBird, a new, fast Python-based code which we make publicly available.

Comments: 27 pages, 6 tables, 8 figures. v2: 33 pages, 8 tables, 9 figures, matches JCAP published version. The PyBird code is available at https://github.com/pierrexyz/pybird