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Volume 282 - 38th International Conference on High Energy Physics (ICHEP2016) - Neutrino Physics
Precision Measurement of $\sin^{2}(2\theta_{13})$ and $|\Delta m^{2}_{ee}|$ from Daya Bay
J. Ling* on behalf of the Daya Bay collaboration
*corresponding author
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Pre-published on: 2017-02-06 14:28:00
Published on: 2017-04-19 16:48:57
Abstract
The Daya Bay experiment was designed to measure the neutrino mixing angle $\sin^{2}(2\theta_{13})$ with unprecedented precision through a relative measurement with eight functionally identical electron anti-neutrino detectors deployed at three experimental halls near three high-power nuclear reactor complexes in south China. In March 2012, the Daya Bay experiment discovered the non-zero value of $\sin^{2}(2\theta_{13})$ with $5.1\sigma$ significance with 55 days data taking with partially installed six electron anti-neutrino detectors. After that, Daya Bay experiment installed the remaining two detectors in the summer of 2012. With 1230 days of data-taking since December 2011, the Daya Bay experiment has accumulated more than 2.5 million reactor electron anti-neutrino inverse-beta-decay events, hence obtained the most precise measurement of $\sin^{2}2\theta_{13} = 0.0841 \pm 0.0033$ and effective mass-squared difference $|\Delta m^{2}_{ee}|= (2.50 \pm 0.08) \times 10^{-3}\ {\rm eV}^2$ up to date.
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