Estimation of waveform deformation with the matched filter

Abstract

In many particle physics experiments the data processing is based on the analysis of the digitized waveforms provided by the detector. While the waveform amplitude is usually correlated to the event energy, the shape may carry useful information for event discrimination. Thanks to the high signal to noise ratio they provide, matched filters are often applied. Their original design is however intended for the estimation of the waveform amplitude only. In this work we introduce an analytical extension of the original matched filter for the estimation of a possible shape deformation with respect to a reference template. The new filter is validated on simulations and, with respect to shape parameters calculated on unfiltered waveforms or derived from the original matched filter, it improves the discrimination capability by at least a factor 2 both at low and high signal to noise ratios, making it applicable to the data of several experiments.

arXiv comment10 pages, 5 figures

References in corpus (13)

• Neutrinoless Double-Beta Decay: Status and Prospects
• First results from the CRESST-III low-mass dark matter program
• Matched filtering of gravitational waves from inspiraling compact binaries: Computational cost and template placement
• EXCESS workshop: Descriptions of rising low-energy spectra
• A novel technique of particle identification with bolometric detectors
• Lowering the energy threshold of large-mass bolometric detectors
• Discrimination of Recoil Backgrounds in Scintillating Calorimeters
• Novel technique for the study of pile-up events in cryogenic bolometers
• Observation of a nuclear recoil peak at the 100 eV scale induced by neutron capture
• Results from a Prototype TES Detector for the Ricochet Experiment
• Pulse Shape Discrimination in CUPID-Mo using Principal Component Analysis
• Pulse shape discrimination for the CONUS experiment in the keV and sub-keV regime
• Background Rejection of n${}^{+}$ Surface Events in GERDA Phase II