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SUMMARY:LEGEND:  Background-free hunt for the neutrinoless double-beta dec
 ay
DTSTART;VALUE=DATE-TIME:20230907T142000Z
DTEND;VALUE=DATE-TIME:20230907T144000Z
DTSTAMP;VALUE=DATE-TIME:20260521T101427Z
UID:indico-contribution-3172@indico.tlabs.ac.za
DESCRIPTION:Speakers: Patrick Krause (Technical University of Munich)\nThe
  discovery that neutrinos are Majorana fermions would have profound implic
 ations for particle physics and cosmology. The Majorana character of neutr
 inos would make neutrinoless double-beta ($0\\nu\\beta\\beta$) decay\, a m
 atter-creating process without the balancing emission of antimatter\, poss
 ible. The LEGEND Collaboration pursues a phased\, $^{76}$Ge-based double-b
 eta decay experimental program. The first phase\, LEGEND-200\, deploys up 
 to 200 kg of germanium detectors enriched in $^{76}$Ge. A background index
  of $2\\cdot 10^{-4}$ counts/(keV kg yr) will be achieved. With that backg
 round index\, when integrated over the exposure\, less than one background
  event in the region around the expected peak position of the $0\\nu\\beta
 \\beta$ decay will be accumulated. It constitutes a quasi-background-free 
 operation of LEGEND-200\, enabling a potential discovery of the $0\\nu\\be
 ta\\beta$ decay at a half-life of at least $10^{27}$ years. The second pha
 se\, LEGEND-1000\, will deploy 1000 kg of enriched germanium and reach a d
 iscovery potential above $10^{28}$ years. This talk will portray how LEGEN
 D utilizes high-purity materials\, novel sub-detector systems\, and sophis
 ticated analysis tools to obtain a quasi-background-free energy spectrum. 
 Furthermore\, first results from the currently ongoing data-taking period 
 of LEGEND-200 are presented.\n\nhttps://indico.tlabs.ac.za/event/112/contr
 ibutions/3172/
LOCATION: Meeting Room 2.61 - 2.66
URL:https://indico.tlabs.ac.za/event/112/contributions/3172/
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