Abstract
This paper presents an energy resolution study of the JUNO experiment,incorporating the latest know-ledge acquired during the detector construction phase.The determination of neutrino mass ordering in JUNO re-quires an exceptional energy resolution better than 3％at 1 MeV.To achieve this ambitious goal,significant efforts have been undertaken in the design and production of the key components of the JUNO detector.Various factors af-fecting the detection of inverse beta decay signals have an impact on the energy resolution,extending beyond the statistical fluctuations of the detected number of photons,such as the properties of the liquid scintillator,perform-ance of photomultiplier tubes,and the energy reconstruction algorithm.To account for these effects,a full JUNO simulation and reconstruction approach is employed.This enables the modeling of all relevant effects and the evalu-ation of associated inputs to accurately estimate the energy resolution.The results of this study reveal an energy res-olution of 2.95％at 1 MeV.Furthermore,this study assesses the contribution of major effects to the overall energy resolution budget.This analysis serves as a reference for interpreting future measurements of energy resolution dur-ing JUNO data collection.Moreover,it provides a guideline for comprehending the energy resolution characteristics of liquid scintillator-based detectors.
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NSTL
万方数据