Recent Results from Daya Bay

Abstract

The Daya Bay reactor neutrino experiment observed electron antineutrino disappearance associated with ${\theta }_{13}$ with a significance better than $5\sigma$ in 2012. The final two of eight antineutrino detectors were installed in the summer of 2012. Including the 404 days of data collected with the full detector configuration resulted in a 3.6 times increase of statistics over the previous result with the 6-AD configuration. With improvements of the systematic uncertainties and better estimation of backgrounds, Daya Bay has measured ${\sin }^{2}2{\theta }_{13}=0.084\pm 0.005$ and $|\Delta m_{ee}^2|=2.42_{-0.11}^{+0.10}\times 10^{-3}$~eV${}^2$. This is the most precise measurement of ${\sin }^{2}2{\theta }_{13}$ to date and the most precise measurement of of $|\Delta m_{ee}^2|$ via electron antineutrino disappearance. Several other analysis results are presented, including an independent measurement of ${\theta }_{13}$ using inverse-beta decays associated with neutron capture on hydrogen, a measurement of reactor antineutrino flux and spectrum, and a search for light sterile neutrino mixing.

Proceedings for NEUTEL 2015

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