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Latest oscillation results from Daya Bay

Published 1 Oct 2024 in hep-ex | (2410.00738v1)

Abstract: The Daya Bay reactor neutrino experiment, which pioneered the measurement of a non-zero value for the neutrino mixing angle $\theta_{13}$ in 2012, operated for nearly nine years, from Nov.~24, 2011, to Dec.~12, 2020. Antineutrinos produced by six reactors, each with a thermal power of 2.9 GW, were detected by eight identically designed detectors located in two near and one far underground experimental halls. The experimental setup, featuring kilometer-scale baselines between the detectors and reactors, enabled precise investigations within the three-neutrino mixing framework. This proceeding presents the latest measurements of the neutrino mixing angle $\theta_{13}$ and the mass-squared difference $\Delta m_{32}2$, based on samples tagged via gadolinium capture ($n$Gd) and hydrogen capture ($n$H). The combined results from Daya Bay's most recent $n$Gd and $n$H data sets provide a $2.6\%$ precision for $\sin22\theta_{13}$. Additionally, a search for light sterile neutrinos with full data set is summarized.

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