An Optimal Energy Estimator to Reduce Correlated Noise for the EXO-200 Light Readout

Abstract

The energy resolution of the EXO-200 detector is limited by electronics noise in the measurement of the scintillation response. Here we present a new technique to extract optimal scintillation energy measurements for signals split across multiple channels in the presence of correlated noise. The implementation of these techniques improves the energy resolution of the detector at the neutrinoless double beta decay Q-value from $\left[1.9641\pm 0.0039\right]\%$ to $\left[1.5820\pm 0.0044\right]\%$.

arXiv comment21 pages, 8 figures, 1 table

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Cited by in corpus (9)

• Search for Neutrinoless Double-Beta Decay with the Complete EXO-200 Dataset
• Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector
• A Review of Basic Energy Reconstruction Techniques in Liquid Xenon and Argon Detectors for Dark Matter and Neutrino Physics Using NEST
• Deep Neural Networks for Energy and Position Reconstruction in EXO-200
• Measurement of the scintillation and ionization response of liquid xenon at MeV energies in the EXO-200 experiment
• A Review of NEST Models for Liquid Xenon and Exhaustive Comparison to Other Approaches
• Searches for Double Beta Decay of ${}^{134}$Xe with EXO-200
• Reflectivity of VUV-sensitive Silicon Photomultipliers in Liquid Xenon
• Development of a ${}^{127}$Xe calibration source for nEXO