# Multi-site Event Discrimination in Large Liquid Scintillation Detectors

## TL;DR

This study uses simulations to develop a method for distinguishing single-site from multi-site energy depositions in large liquid scintillation detectors, enhancing background rejection for rare event searches like neutrinoless double beta decay.

## Contribution

It introduces a robust simulation-based approach for event discrimination in large liquid scintillation detectors, improving background suppression in rare decay searches.

## Key findings

- Significant statistical separation between event types predicted.
- Method effectively discriminates against radioactive backgrounds.
- Applicable to neutrinoless double beta decay experiments.

## 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.