Neutrino 2026: XXXII International Conference on Neutrino Physics and Astrophysics

Inverse beta-decay selection, efficiency estimation and accidental background calculation in JUNO’s oscillation measurement

Not scheduled

20m

Conference Center (University of California, Irvine)

Poster Reactor Neutrinos Poster session

Speakers

Junjie Jiang (Shanghai Jiao Tong University) Marco Grassi (Universita e INFN, Padova (IT))

Description

Located in the Jiangmen City, Guangdong Province, China, the Jiangmen Underground Neutrino Observatory (JUNO) is an experiment with a spherical central detector (CD) filled with ultra-pure liquid scintillator surrounded by a pool filled with ultra-pure water (WP). About 17,612 large 20-inch PMTs and 25,600 smaller 3-inch PMTs were instrumented to collect the light from CD and a few thousands of large PMTs were used in WP as the veto. The primary physics goal of JUNO is to
determine the neutrino mass ordering and to make sub-percentage precision measurements of the three-flavour neutrino oscillation parameters. The target physics process is the inverse beta decay
(IBD), $\bar{\nu}_e + p \rightarrow e^{+} + n$. This poster presents the comprehensive methodology and results for the selection of IBD events, the estimation of selection efficiencies and the calculation of the accidental background in JUNO’s oscillation analysis.