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Published June 2018 | Published + Submitted
Journal Article Open

Sensitivity and discovery potential of the proposed nEXO experiment to neutrinoless double-β decay


The next-generation Enriched Xenon Observatory (nEXO) is a proposed experiment to search for neutrinoless double-β (0νββ) decay in ^(136)Xe with a target half-life sensitivity of approximately 10^(28) yr using 5×10^3 kg of isotopically enriched liquid-xenon in a time projection chamber. This improvement of two orders of magnitude in sensitivity over current limits is obtained by a significant increase of the ^(136)Xe mass, the monolithic and homogeneous configuration of the active medium, and the multiparameter measurements of the interactions enabled by the time projection chamber. The detector concept and anticipated performance are presented based upon demonstrated realizable background rates.

Additional Information

© 2018 American Physical Society. Received 24 October 2017; revised manuscript received 1 May 2018; published 15 June 2018. We gratefully acknowledge the support of SNOLAB for the gamma and radon assay work conducted on site. We thank Mitchell Negus for contributing to the simulation work. This work has been supported by the Offices of Nuclear and High Energy Physics within DOE's Office of Science, and NSF in the United States; by NSERC, CFI, FRQNT, NRC, and the McDonald Institute (CFREF) in Canada; by SNF in Switzerland; by IBS in Korea; by RFBR in Russia; and by CAS and ISTCP in China. This work was supported in part by Laboratory Directed Research and Development (LDRD) programs at Brookhaven National Laboratory (BNL), Lawrence Livermore National Laboratory (LLNL), Oak Ridge National Laboratory (ORNL), and Pacific Northwest National Laboratory (PNNL).

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Submitted - 1710.05075.pdf

Published - PhysRevC.97.065503.pdf


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August 19, 2023
August 19, 2023