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

Kavli Affiliate: N. C. Yeh
| First 5 Authors: [#item_custom_name[1, [#item_custom_name[2, [#item_custom_name[3, [#item_custom_name[4, [#item_custom_name[5| Summary:The SNO+ Collaboration reports new results on reactor antineutrino oscillations using data acquired from May 2022 through July 2025. The spectral analysis of a flux dominated by nuclear reactors at 240, 350, and 355 kilometers yields the mass-squared difference $Δm^2_21=(7.93^+0.21_-0.24)times 10^-5$ eV$^2$. This result is compatible with and approaches the precision of the only other long-baseline reactor antineutrino measurement, by KamLAND. Combining these measurements, along with those from solar neutrino experiments, the global values of the neutrino mixing parameters become: $Δm^2_21$ = $(7.63pm0.17)times 10^-5$ eV$^2$ and $sin^2θ_12=0.310pm0.012$. The analysis of geoneutrinos at SNO+ is also improved, with a measured signal of 49$^+13_-12$ TNU.| Search Query: arXiv Query: search_query=au:Yeh OR all:Nai-Chang&id_list=&start=0&max_results=3Read More