# Resolution enhancement with light/heat decorrelation in CUPID-0 bolometric detector

## TL;DR

This paper demonstrates how decorrelation of light and heat signals in CUPID-0 bolometers improves energy resolution, enhancing the detector's sensitivity for neutrinoless double beta decay searches.

## Contribution

The study introduces and evaluates decorrelation algorithms that significantly improve energy resolution in bolometric detectors by reducing heat-light correlation effects.

## Key findings

- FWHM energy resolution improved to 90.5% of original value
- Energy resolution at 2615 keV improved from 20.7 keV to 18.7 keV
- Decorrelation algorithms effectively enhance detector performance

## Abstract

The CUPID-0 experiment searches for neutrinoless double beta decay ($0\nu\beta\beta$) using the first array of enriched Zn$^{82}$Se scintillating bolometers with double (heat and light) read-out. To further enhance the CUPID-0 detector performances, the heat-light correlation has been exploited to improve the energy resolution. Different decorrelation algorithms have been studied and the best result is the average reduction of the full width at half maximum (FWHM) energy resolution to $(90.5\pm0.6)~\%$ of its original value , corresponding to a change from $\text{FWHM}=(20.7\pm0.5)~\text{keV}$ to $\text{FWHM}=(18.7\pm0.5)~\text{keV}$ at the 2615 keV $\gamma$ line.