Five-percent measurements of the growth rate from simulation-based
  modelling of redshift-space clustering in BOSS LOWZ
  We use a simulation-based modelling approach to analyse the anisotropic
clustering of the BOSS LOWZ sample over the radial range $0.4 \, h^{-1} \,
\mathrm{Mpc}$ to $63 \, h^{-1} \, \mathrm{Mpc}$, significantly extending what
is possible with a purely analytic modelling framework. Our full-scale analysis
yields constraints on the growth of structure that are a factor of two more
stringent than any other study on large scales at similar redshifts. We infer
$f \sigma_8 = 0.471 \pm 0.024$ at $z \approx 0.25$, and $f \sigma_8 = 0.431 \pm
0.025$ at $z \approx 0.40$; the corresponding $\Lambda$CDM predictions of the
Planck CMB analysis are $0.470 \pm 0.006$ and $0.476 \pm 0.005$, respectively.
Our results are thus consistent with Planck, but also follow the trend seen in
previous low-redshift measurements of $f \sigma_8$ falling slightly below the
$\Lambda$CDM+CMB prediction. We find that small and large radial scales yield
mutually consistent values of $f \sigma_8$, but there are $1-2.5 \sigma$ hints
of small scales ($< 10 \, h^{-1} \, \mathrm{Mpc}$) preferring lower values for
$f \sigma_8$ relative to larger scales. We analyse the constraining power of
the full range of radial scales, finding that most of the multipole information
about $f\sigma_8$ is contained in the scales $2 \, h^{-1} \, \mathrm{Mpc}
\lesssim s \lesssim 20 \, h^{-1} \, \mathrm{Mpc}$. Evidently, once the
cosmological information of the quasi-to-nonlinear regime has been harvested,
large-scale modes contain only modest additional information about structure
growth. Finally, we compare predictions for the galaxy-galaxy lensing amplitude
of the two samples against measurements from SDSS and assess the lensing-is-low
effect in light of our findings.
