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Measurement of antineutrino oscillation with the full detector configuration at Daya Bay (1605.09122v1)

Published 30 May 2016 in hep-ex and physics.ins-det

Abstract: In this poster, we present the latest measurement of electron antineutrino disappearance using the fully constructed Daya Bay Reactor Neutrino Experiment. A total exposure of $6.9 \times 105$ GW${\mathrm{th}}$ ton days was achieved in November 2013 after 617 day of data taking. The most precise estimates to date of the neutrino mass and mixing parameters $|\Delta \mathrm{m}2{ee}|$ and $\sin2 2 \theta_{13}$ were obtained with an analysis of the relative antineutrino rates and energy spectra between detectors. The value of the two parameters was found to be $\sin2 2 \theta_{13} = 0.084 \pm 0.005$ and $|\Delta \mathrm{m}2_{ee}| = (2.42 \pm 0.11) \times 10{-3}\,\mathrm{eV}2$. This report focuses in particular on describing how improvements in the calibration and in the energy response model contributed to achieve this result.

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