First-principle event reconstruction by time-charge readouts for the Taishan Antineutrino Observatory
arxiv(2024)
摘要
The Taishan Antineutrino Observatory (TAO) is a liquid-scintillator satellite
experiment of the Jiangmen Underground Neutrino Observatory (JUNO) to measure
the reference reactor neutrino spectrum with sub-percent energy resolution. We
use inhomogeous Poisson process and Tweedie generalized linear model (GLM) to
calibrate the detector response and the charge distribution of a SiPM. We
develop a pure probabilistic method using time and charge of SiPMs from first
principles to reconstruct point-like events in the TAO central detector. Thanks
to our precise model and the high photo-coverage and quantum efficiency of the
SiPM tiles at TAO, we achieve a vertex position resolution better than 16 mm
and an energy resolution of about 2
performance of liquid scintillator detectors. Our methodology is applicable to
other experiments that utilize PMTs for time and charge readouts.
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