Measurement of electron antineutrino oscillation based on 1230 days of operation of the Daya Bay experiment

By D. An, A. Balantekin, H. Band, M. Bishai, S. Blyth, D. Cao, G. Cao, J. Cao, W. R. Cen, Y. Chan and 206 more. 2016

216 citations recorded by the source corpus.

A measurement of electron antineutrino oscillation by the Daya Bay Reactor Neutrino Experiment is described in detail. Six 2.9-GWth nuclear power reactors of the Daya Bay and Ling Ao nuclear power facilities served as intense sources of νe’s. Comparison of the νe rate and energy spectrum measured by antineutrino detectors far from the nuclear reactors (∼1500–1950  m ) relative to detectors near the reactors (∼350–600  m ) allowed a precise measurement of νe disappearance. More than 2.5 million νe inverse beta-decay interactions were observed, based on the combination of 217 days of operation of six antineutrino detectors (December, 2011–July, 2012) with a subsequent 1013 days using the complete configuration of eight detectors (October, 2012–July, 2015). The νe rate observed at the far detectors relative to the near detectors showed a significant deficit, R=0.949±0.002(stat)±0.002(syst). The energy dependence of νe disappearance showed the distinct variation predicted by neutrino oscillation. Analysis using an approximation for the three-flavor oscillation probability yielded the flavor-mixing angle sin^2 2θ_(13)=0.0841±0.0027(stat)±0.0019(syst) and the effective neutrino mass-squared difference of |Δm^2_(ee)|=(2.50±0.06(stat)±0.06(syst))×10^(−3)  eV^2. Analysis using the exact three-flavor probability found Δm^2_(32)=(2.45±0.06(stat)±0.06(syst))×10^(−3)  eV^2 assuming the normal neutrino mass hierarchy and Δm^2_(32)=(−2.56±0.06(stat)±0.06(syst))×10^(−3)  eV^2 for the inverted hierarchy.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/889aa033b9f9c826f0c672d87784db703da86c1e

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Citations in the corpus

• Prospects for beyond the Standard Model physics searches at the Deep Underground Neutrino Experiment (2020, methodology): “2 The top plot shows the DUNE sensitivities to θ14 from the νe CC samples at the ND and FD, along with a comparison with the combined reactor result from Daya Bay and Bugey-3.”
• 2020 global reassessment of the neutrino oscillation picture (2020, unknown): “[56]).”
• Updated global analysis of neutrino oscillations in the presence of eV-scale sterile neutrinos (2018, methodology): “For the latter we include the ratios of spectra measured in experimental halls (EH) 3 and 1, and in experimental halls 2 and 1 [71], as well as the measurement of the individual neutrino fluxes from each fissible isotope [37].”
• Deep Underground Neutrino Experiment (DUNE), Far Detector Technical Design Report, Volume II: DUNE Physics (2020, methodology): “The complete data set used, as well as the parameters to which they are sensitive, are (1) from solar neutrino data [298, 413, 414, 415, 416, 417, 418, 419, 420, 421]: θ12, ∆m(2)21, and θ13; (2) from neutrino mode in long-baseline experiments K2K [422], MINOS [423, 424], T2K [425, 426], and NOνA [42”
• Neutrino Oscillations and Non-standard Interactions (2017, background): “The latest data release from Daya Bay has reported the detection of more than 2.5 millions of reactor antineutrino events, after 1230 days of data taking [76].”