Matt Kramer (LBNL) – “Measurement of sin²2θ₁₃ and Δm²ₑₑ from the Full Dataset of the Daya Bay Experiment”

ABSTRACT: (This is a Hybrid/ZOOM Meeting)
The Daya Bay Reactor Neutrino Experiment was built to measure the smallest neutrino mixing angle, θ₁₃, using the oscillation of electron antineutrinos produced by the Daya Bay nuclear power complex in southern China. Using the rate and spectral shape of antineutrino events at multiple baselines from the reactors, sin²2θ₁₃ is extracted along with the effective mass splitting Δm²ₑₑ. This talk describes, step-by-step, the latest oscillation analysis from our full dataset of ~5.5 million antineutrinos acquired over nearly a decade. In addition to the increase in statistics, this analysis benefits from improvements in energy reconstruction and background subtraction. With an uncertainty of 2.8%, this measurement of sin²2θ₁₃ is likely to remain the world’s most precise for the foreseeable future.