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Volume 295 - The 19th International Workshop on Neutrinos from Accelerators NUFACT2017 (NuFact2017) - Working group 1: Reactors
Latest results from the Daya Bay experiment
P. Ochoa* on behalf of the Daya Bay collaboration
*corresponding author
Full text: pdf
Pre-published on: 2018 March 04
Published on: 2018 June 18
The Daya Bay Reactor Neutrino Experiment consists of eight functionally identical detectors placed underground at different baselines from six $\mathrm{2.9~GW_{th}}$ nuclear reactors. With a growing dataset that constitutes the largest sample of reactor antineutrino interactions ever collected to date, Daya Bay is able to study a wide range of topics of interest in neutrino physics. In this letter I review the latest results from Daya Bay on different fronts, such as the latest measurement of the oscillation parameters that drive the disappearance of electron antineutrinos at short baselines, and a search for light sterile neutrino mixing, among others. I also describe a recent measurement of the evolution of the reactor antineutrino flux and spectrum over multiple fuel cycles in 1230 days. A $3.1\sigma$ discrepancy in the antineutrino flux evolution with recent predictions is observed, indicating an overestimation of the predicted antineutrino flux from $^{235}$U and suggesting that this fission isotope could be the primary contributor to the reactor antineutrino anomaly.
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