Abstract
High-precision vertex and energy reconstruction are crucial for large liquid scintillator detectors such as that at the Jiangmen Underground Neutrino Observatory (JUNO), especially for the determination of neutrino mass ordering by analyzing the energy spectrum of reactor neutrinos. This paper presents a data-driven method to obtain a more realistic and accurate expected PMT response of positron events in JUNO and develops a simultaneous vertex and energy reconstruction method that combines the charge and time information of PMTs. For the JUNO detector, the impact of the vertex inaccuracy on the energy resolution is approximately 0.6%.
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Gui-Hong Huang, Wu-Ming Luo, and Wei Jiang. The first draft of the manuscript was written by Wu-Ming Luo and Gui-Hong Huang, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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This work was supported by the National Key R &D Program of China (No.2018YFA0404100), the Strategic Priority Research Program of the Chinese Academy of Sciences (No. 12175257), the National Natural Science Foundation of China (No. 12175257) and the Science Foundation of High-Level Talents of Wuyi University (No. 2021AL027).
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Huang, GH., Jiang, W., Wen, LJ. et al. Data-driven simultaneous vertex and energy reconstruction for large liquid scintillator detectors. NUCL SCI TECH 34, 83 (2023). https://doi.org/10.1007/s41365-023-01240-0
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DOI: https://doi.org/10.1007/s41365-023-01240-0