Methods for Pulse shape discrimination in the LEGEND experiment
ORAL
Abstract
The discovery of Neutrinoless double beta decay (0νββ) would have profound implications for neutrino physics and cosmology. It would provide unambiguous evidence for the Majorana nature of neutrinos, lepton number non-conservation and the absolute neutrino mass scale. The Large Enriched Germanium Experiment for Neutrinoless ββ decay (LEGEND) searches for 0νββ in the 76Ge isotope. The LEGEND-200 phase that is presently operational at high-purity Germanium (HPGe) detectors with excellent energy resolution immersed in liquid argon, allowing the rejection of backgrounds external to the Ge detector. The pulse shape analysis plays a critical role in distinguishing bulk 0νββ events from multi-site events and surface backgrounds that arise from gamma rays and other sources. This is crucial to maximize the sensitivity of the experiment to 0νββ and other physics events. I will discuss the status of the experiment, various pulse shape discrimination (PSD) cuts that have been employed and their impact on the signals and the backgrounds.
*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
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Presenters
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Harisree Krishnamoorthy
- Oak Ridge National Laboratory