Cosmological Parameters and Neutrino Masses from the Final Planck and
  Full-Shape BOSS Data
  We present a joint analysis of the Planck cosmic microwave background (CMB)
and Baryon Oscillation Spectroscopic Survey (BOSS) final data releases. A key
novelty of our study is the use of a new full-shape (FS) likelihood for the
redshift-space galaxy power spectrum of the BOSS data, based on an improved
perturbation theory template. We show that the addition of the redshift space
galaxy clustering measurements breaks degeneracies present in the CMB data
alone and tightens constraints on cosmological parameters. Assuming the minimal
$\Lambda$CDM cosmology with massive neutrinos, we find the following
late-Universe parameters: the Hubble constant \mbox{$H_0=67.95^{+0.66}_{-0.52}$
km s$^{-1}$Mpc$^{-1}$}, the matter density fraction
\mbox{$\Omega_m=0.3079^{+0.0065}_{-0.0085}\,$}, the mass fluctuation amplitude
\mbox{$\sigma_8=0.8087_{-0.0072}^{+0.012}\,$}, and an upper limit on the sum of
neutrino masses \mbox{$M_{\text{tot}} <0.16\,$ eV} ($95\%$ CL).This can be
contrasted with the Planck-only measurements: \mbox{$H_0=67.14_{-0.72}^{+1.3}$}
km s$^{-1}$Mpc$^{-1}$, $\Omega_m=0.3188^{+0.0091}_{-0.016}\,$,
\mbox{$\sigma_8=0.8053_{-0.0091}^{+0.019}\,$}, and \mbox{$M_{\text{tot}}
<0.26\,$ eV} ($95\%$ CL). Our bound on the sum of neutrino masses relaxes once
the hierarchy-dependent priors from the oscillation experiments are imposed.
The addition of the new FS likelihood also constrains the effective number of
extra relativistic degrees of freedom, \mbox{$N_{\text{eff}}=2.88\pm 0.17$}.
Our study shows that the current FS and the pure baryon acoustic oscillation
data add a similar amount of information in combination with the Planck
likelihood. We argue that this is just a coincidence given the BOSS volume and
efficiency of the current reconstruction algorithms.In the era of future
surveys FS will play a dominant role in cosmological parameter measurements.
