The 28th International Meeting of the JUNO collaboration is taking place in Beijing
The status of the JUNO detector and its current performance, the plan for data acquisition and processing (including computing resource planning), and requirements for future physics results and publications were discussed at the meeting.
The first physics result of the experiment, based on a 59-day dataset, was presented in November 2025. The neutrino oscillation parameters Δm²₂₁ and sin²θ₁₂ were measured with record precision. A new result, incorporating 207 days of data, was reported at the Neutrino 2026 conference in July. In addition to refining the values of Δm²₂₁ and sin²θ₁₂, JUNO also measured |Δm²₃₁| with record precision. While it is still premature to claim an unambiguous determination of the mass ordering, the result presented by JUNO indicates a preference for the normal ordering (m₁
The JUNO data spectrum indicates a significant contribution to the total signal from geoneutrinos, neutrinos originating from the Earth's crust and mantle. The geoneutrino statistics accumulated by JUNO have already exceeded the total global dataset collected throughout the history of their study. However, it is still too early to speak of a statistically significant deviation from the overall picture.
Staff members of our laboratory have been actively participating in this project since its inception. Eleven of our colleagues are representing DLNP JINR at the 28th collaboration meeting.
For the reference
The primary goal of the JUNO experiment is to determine the neutrino mass ordering. Thanks to the massive size of the liquid scintillator detector and its high energy resolution, the experiment opens up a wide range of research opportunities: from precision measurements of mixing parameters in the lepton sector of the Standard Model, detection of geoneutrinos, and observation of supernova neutrinos to searching for New Physics, including proton decay.
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