부산대학교 도서관

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% at 1 MeV, marking the world's best performance of liquid scintillator detectors. Our methodology is applicable to other experiments that utilize PMTs for time and charge readouts.
Comment: This paper draft should be reviewed by the collaboration before being submitted to arXiv. However, we got the order wrong and submitted it in advance. We want to withdraw the submission first and upload a new version after obtaining the consent of the collaboration