  The Daya Bay reactor neutrino experiment has observed the disappearance of
electron antineutrinos from nuclear reactors at $\sim$kilometer baselines. The
relative measurement of the $\bar\nu_e$ rate and spectrum between near and far
detectors allows for a precision measurement of the oscillation parameters
$\sin^22\theta_{13}$ and $|\Delta{m}^2_{ee}|$. Two new antineutrino detectors
(ADs) were installed in summer 2012, bringing the experiment to the final 8-AD
configuration. With 621 days of data, Daya Bay has measured $\sin^22\theta_{13}
= 0.084 \pm 0.005$ and $|\Delta{m}^2_{ee}| = 2.44^{+0.10}_{-0.11} \times
10^{-3}$ eV$^2$. This is the most precise measurement of $\sin^22\theta_{13}$
to date and the most precise measurement of $|\Delta{m}^2_{ee}|$ in this
channel. Several other analyses are also performed, including an independent
measurement of $\sin^22\theta_{13}$ using $\bar\nu_e$ samples tagged by neutron
capture on hydrogen, a search for light sterile neutrinos, and a measurement of
the absolute reactor antineutrino flux.

High Energy Physics - Experiment;Instrumentation and Detectors