Speaker
Description
The discovery of neutrinoless double beta decay ($0\nu\beta\beta$) would not only definitively prove that neutrinos are Majorana particles but also that lepton number is not a fundamental symmetry. Furthermore, being a purely matter-creating process, it would be pivotal for our best theories of the matter-antimatter asymmetry in our universe. LEGEND (Large Enriched Germanium Experiment for Neutrinoless double beta Decay) is a multiphase program to search for $0\nu\beta\beta$ in ${}^{76}Ge$. The first phase, LEGEND-200, has been running and continues to run at LNGS in Italy for the last few years with an eventual discovery sensitivity at a half-life of $10^{27}$ years. One of the main background mitigations is the active liquid argon veto. Instrumented with wavelength shifting fibres coupled to Silicon Photomultipliers it allows the removal of events where energy is not deposited entirely within the germanium detectors. In this poster I will present a novel template based approach for performing the signal processing of these detectors, including an innovative method for upsampling signals. This method promises improved single photoelectron discrimination as well as crosstalk rejection capabilities.
This work is supported by the U.S. DOE and the NSF, the LANL, ORNL and LBNL LDRD programs; the European ERC and Horizon programs; the German DFG, BMBF, and MPG; the Italian INFN; the Polish NCN and MNiSW; the Czech MEYS; the Slovak SRDA; the Swiss SNF; the UK STFC; the Russian RFBR; the Canadian NSERC and CFI; the LNGS, SNOLAB, and SURF facilities.