Measurement of reactor antineutrino oscillation at SNO+

Abstract

The SNO+ collaboration reports its second spectral analysis of reactor antineutrino oscillation using 286 tonne-years of new data. The measured energies of reactor antineutrino candidates were fitted to obtain the second-most precise determination of the neutrino mass-squared difference $\Delta m_{21}^2$ = ($7.96_{-0.42}^{+0.48}$) $\times$ 10${}^{-5}$ eV${}^2$. Constraining $\Delta m_{21}^2$ and ${\sin }^2{\theta }_{12}$ with measurements from long-baseline reactor antineutrino and solar neutrino experiments yields $\Delta m_{21}^2$ = ($7.58_{-0.17}^{+0.18}$) $\times$ 10${}^{-5}$ eV${}^2$ and ${\sin }^2{\theta }_{12}=0.308\pm 0.013$. This fit also yields a first measurement of the flux of geoneutrinos in the Western Hemisphere, with $73_{-43}^{+47}$ TNU at SNO+.

References in corpus (7)

• The SNO+ Experiment
• Sub-percent Precision Measurement of Neutrino Oscillation Parameters with JUNO
• Solar neutrino measurements using the full data period of Super-Kamiokande-IV
• Abundances of uranium and thorium elements in Earth estimated by geoneutrino spectroscopy
• Evidence of Antineutrinos from Distant Reactors using Pure Water at SNO+
• Initial measurement of reactor antineutrino oscillation at SNO+
• Fast Exact Algorithm for Neutrino Oscillation in Constant Matter Density

Cited by in corpus (1)

• Measurement of reactor antineutrino oscillations with 1.46 ktonne-years of data at SNO+