Towards First Detection of the Solar MSW Transition With JUNO
arXiv:2512.14824 · doi:10.1103/qhr8-qhhp
Abstract
Matter-induced neutrino flavor mixing (the Mikheyev-Smirnov-Wolfenstein, or MSW, effect) is a central prediction of the neutrino mixing framework, but it has not been conclusively observed. Direct observation of the energy-dependent MSW transition in the solar electron-neutrino survival probability would solve this, but backgrounds have been prohibitive. We show that our new technique for suppressing muon-induced spallation backgrounds will allow JUNO to measure the MSW transition at 4 significance in 10 years. This would strongly support upcoming multi-$1B next-generation experiments and their goals in cementing the neutrino mixing framework.
Main text is 5 pages. Minor changes to match the published version and to fix a minor LaTeX bug
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