Bulletin of the American Physical Society
2021 Fall Meeting of the APS Division of Nuclear Physics
Volume 66, Number 8
Monday–Thursday, October 11–14, 2021; Virtual; Eastern Daylight Time
Session FB: Mini-Symposium: Neutrinos and Nuclei IV: Recent and Future Double Beta Decay Efforts
2:00 PM–3:48 PM,
Tuesday, October 12, 2021
Room: Statler
Chair: Andrea Pocar, UMass, Amherst
Abstract: FB.00004 : Double beta decay search with LEGEND-200*
2:36 PM–2:48 PM
Presenter:
Bjoern Lehnert
Author:
Bjoern Lehnert
Collaboration:
LEGEND
The LEGEND collaboration was formed 5 years ago, connecting members of the Majorana Demonstrator and GERDA experiments with other scientists. We established a global, multi-stage strategy to use 76Ge for 0νββ searches. LEGEND-200 is the first stage and is currently being installed at the Laboratori Nazionali del Gran Sasso (Italy) in the existing GERDA facility. It is designed to achieve about a factor of 10 increase in exposure (1,000 kg×yr), background reduction (2×10-4 cts/kg/keV/yr), and half-life discovery sensitivity (1027 yr) compared to the previous generation experiments. Commissioning is foreseen by the end of 2021, followed by a 5-year data-taking period.
LEGEND-200 will serve as a testbed for technology improvements and as an intermediate step to the tonne-scale LEGEND-1000 project. This second stage is envisioned for deployment at SNOLAB (ON, Canada) and aims at increasing the exposure (10,000 kg×yr), background reduction (10-5 cts/kg/keV/yr), and discovery sensitivity (1028 yr) by another factor of 10 over a 10-year data-taking period.
This talk presents the physics reach of LEGEND-200, new technologies deployed, and reports on the status of the ongoing installation.
*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 and SURF facilities.
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