From Daya Bay experiment to Jiangmen Underground Neutrino Observatory experiment

Currently, the neutrino oscillation phenomenon is of research interest in particle physics. The discovery of the neutrino oscillation phenomenon confirmed that neutrinos have a minute mass, which is an important way to explore new physics beyond the standard model. The Daya Bay reactor neutrino experiment is an underground experiment that studies short-baseline reactor neutrino oscillations. It uses the far and near-identical detectors to reduce the detector uncertainty and the reactor neutrino expected flux uncertainty to measure the anti-neutrino rate and energy spectrum. The Daya Bay experiment released the latest neutrino oscillation parameters sin(2) 2 theta(13) and vertical bar Delta m(32)(2)vertical bar in 2018, which used 1958 days of data. The sin(2) 2 theta(13) had the highest measurement precision to date, which reached 3.4%, and the precision of vertical bar Delta m(32)(2)vertical bar was 2.8%, which was comparable with that of the accelerator-based experiments, such as MINOS, No nu A and T2K. The accurate measurement of theta(13) will be helpful to the next-generation of neutrino experiments that will determine the neutrino mass ordering and measure the CP-violating phase. Jiangmen Underground Neutrino Observatory (JUNO) is a multipurpose neutrino experiment that is under construction. The main scientific aim of JUNO is to determine the neutrino mass ordering by measuring the neutrino energy spectrum with a resolution of 3% at 1 MeV and a >= 1% energy linearity. The neutrino mass ordering can be measured with a significance 3-4 sigma based on six years of data that has been collected. In addition, JUNO will make a significant contribution to the precise measurement of neutrino oscillation parameters and the study of supernova neutrinos, solar neutrinos, atmospheric neutrinos, geoneutrinos, and nucleon decay.