Abstract
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.