Measurement of $H(z)$ and $D_A(z)$ from the two-dimensional power
  spectrum of Sloan Digital Sky Survey luminous red galaxies
  We present a method to measure the Hubble parameter $H(z)$ and the angular
diameter distance $D_A(z)$ simultaneously from the two-dimensional matter power
spectrum from galaxy surveys with broad sky coverage. We validate this method
by applying it to the LasDamas mock galaxy catalogs. Then we apply this method
to Sloan Digital Sky Survey (SDSS) Data Release 7 and obtain measurements of
$\Omega_mh^2=0.1268 \pm 0.0085$, $H(z=0.35)=81.3\pm 3.8$km/s/Mpc, $D_A(z=0.35)
= 1037\pm44$Mpc, without assuming a dark energy model or a flat universe. We
also find that the derived parameters $H(0.35)r_s(z_d)/c=0.0431 \pm 0.0018$ and
$D_A(0.35)/r_s(z_d)=6.48 \pm 0.25$. These are in excellent agreement with
similar measurements from the two-dimensional correlation function of the same
data.
