Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 20: Neutrino Physics without Accelerators 1

T 20.1: Gruppenbericht

Montag, 21. März 2022, 16:15–16:35, T-H33

JUNO physics potential and status — •Alexandre Göttel for the JUNO collaboration — Forschungszentrum Jülich GmbH, Nuclear Physics Institute IKP-2, Jülich, Germany — III. Physikalisches Institut B, RWTH Aachen University, Germany

The Jiangmen Underground Neutrino Observatory (JUNO) is a next-generation liquid scintillator experiment being built in the Guangdong province in China. JUNO’s target mass of 20 kton will be contained in a 35.4 m acrylic vessel, itself submerged in a water pool, under about 700 m of granite overburden. Surrounding the acrylic vessel are 17612 20” PMTs and 25600 3” PMTs. The main goal of JUNO, whose construction is scheduled for completion in 2022, is a 3-4σ determination of the neutrino mass ordering (MO) using reactor neutrinos within six years, as well as a sub-percent measurement of the oscillation parameters θ₁₂, Δ m₂₁², and Δ m₃₁². JUNO’s large target mass, low background, and dual calorimetry, leading to an excellent energy resolution and low threshold, allows for a rich physics program with many applications - including solar-, geo-, and atmospheric neutrino measurements. JUNO will also be able to measure neutrinos from galactic core-collapse supernovae, detecting about 10,000 events for a supernova at 10 kpc within 10 s, and achieve a 3σ discovery of the diffuse supernova neutrino background in ten years. JUNO is also suited for exotic searches and can be expected to give a lower limit of 8.34e33 years (90% C.L.) on the proton lifetime. This group talk covers the rich neutrino and astrophysics potential of the JUNO experiments and gives an update on the current experimental status.