Status of JUNO experiment

Bei-Zhen Hu^1*, Yee Bob Hsiung¹

¹Physics, National Taiwan University, Taipei, Taiwan

* Presenter:Bei-Zhen Hu, email:ptbei1985@gmail.com

The Jiangmen Underground Neutrino Observatory(JUNO) is a 20 kton liquid scintillator detector under construction in southern China. The baseline for measuring the reactor antineutrinos of two nuclear power plants is 53 km. The primary goal of the JUNO experiment is to determine the neutrino mass hierarchy through a measurement of the fine structure in the oscillated spectrum with a significance of 3~4 , and to precisely measure the mixing parameters, , and . An unprecedentedly high energy resolution of 3% at 1 MeV is required for this purpose. To achieve this, the high transparency liquid scintillator (LS), low backgrounds are needed and an independent double calorimetry system consisting of 25000 3-inch small photomultiplier tubes (SPMTs) and 18000 20-inch large PMTs (LPMTs) will be used. The experiment will also look for geo-neutrinos, solar-neutrinos, atmospheric neutrinos, and supernova neutrinos. Data taking is expected to start in 2022.

Keywords: neutrino mass hierarchy, JUNO