Multi-site Event Discrimination in Large Liquid Scintillation Detectors

Abstract

Simulation studies have been carried out to explore the ability to discriminate between single-site and multi-site energy depositions in large scale liquid scintillation detectors. A robust approach has been found that is predicted to lead to a significant statistical separation for a large variety of event classes, providing a powerful tool to discriminate against backgrounds and break important degeneracies in signal extraction. This has particularly relevant implications for liquid scintillator searches for neutrinoless double beta decay ($0\nu \beta \beta$) from ${}^{130}$Te and ${}^{136}$Xe, where it is possible for a true $0\nu \beta \beta$ signal to be distinguished from most radioactive backgrounds (including those from cosmogenic production) as well as unknown gamma lines from the target isotope.

arXiv comment20 pages, 10 figures

References in corpus (14)

• Asymptotic formulae for likelihood-based tests of new physics
• The Sudbury Neutrino Observatory
• Final results of Borexino Phase-I on low energy solar neutrino spectroscopy
• Current Status and Future Prospects of the SNO+ Experiment
• The event generator DECAY4 for simulation of double beta processes and decay of radioactive nuclei
• An improved measurement of the 2νββ half-life of Xe-136 with EXO-200
• Pulse shape discrimination for GERDA Phase I data
• Positronium signature in organic liquid scintillators for neutrino experiments
• CNO and pep neutrino spectroscopy in Borexino: Measurement of the deep underground production of cosmogenic 11C in organic liquid scintillator
• In-situ characterization of the Hamamatsu R5912-HQE photomultiplier tubes used in the DEAP-3600 experiment
• Characterization of the Hamamatsu 8" R5912-MOD Photomultiplier Tube
• Cosmogenic activation of a natural tellurium target
• Suppression of Cosmic Muon Spallation Backgrounds in Liquid Scintillator Detectors Using Convolutional Neural Networks
• Characterization of positronium properties in doped liquid scintillators

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• The Future of Solar Neutrinos
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• Cherenkov and Scintillation Separation in Water-Based Liquid Scintillator using an LAPPD
• Demonstration of new MeV-scale capabilities in large neutrino LArTPCs using ambient radiogenic and cosmogenic activity in MicroBooNE
• KamNet: An Integrated Spatiotemporal Deep Neural Network for Rare Event Search in KamLAND-Zen
• Search for Hidden Neutrinos at the European Spallation Source: the SHiNESS experiment
• Neutrinos from Diffuse Supernova Background
• Slow-Fluor Scintillator for Low Energy Solar Neutrinos and Neutrinoless Double Beta Decay