The clustering of LRGs in the DECaLS DR8 footprint: distance constraints
  from baryon acoustic oscillations using photometric redshifts
  A photometric redshift sample of Luminous Red Galaxies (hereafter LRGs)
obtained from The DECam Legacy Survey (DECaLS) is analysed to probe cosmic
distances by exploiting the wedge approach of the two-point correlation
function. Although the cosmological information is highly contaminated by the
uncertainties existing in the photometric redshifts from the galaxy map, an
angular diameter distance can be probed at the perpendicular configuration in
which the measured correlation function is minimally contaminated. An ensemble
of wedged correlation functions selected up to a given threshold based on
having the least contamination was studied in the previous work
(arXiv:1903.09651v2 [astro-ph.CO]) using simulations, and the extracted
cosmological information was unbiased within this threshold. We apply the same
methodology for analysing the LRG sample from DECaLS which will provide the
optical imaging for targeting two-thirds of the DESI footprint and measure the
angular diameter distances at $z=0.69$ and $z=0.87$ to be $D_{A}(0.697)=(1499
\pm 77\,\mathrm{Mpc})(r_{d}/r_{d,fid})$ and $D_{A}(0.874)=(1680 \pm
109\,\mathrm{Mpc})(r_{d}/r_{d,fid})$ with a fractional error of 5.14% and 6.48%
respectively. We obtain a value of $H_{0}=67.59\pm5.52$ km/s/Mpc which supports
the $H_0$ measured by all other BAO results and is consistent with $\Lambda$CDM
model.
