Projected sensitivity of the LUX-ZEPLIN experiment to the two-neutrino and neutrinoless double β decays of 134Xe

The LUX-ZEPLIN (LZ) Collaboration

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Abstract

The projected sensitivity of the LUX-ZEPLIN (LZ) experiment to two-neutrino and neutrinoless double beta decay of 134Xe is presented. LZ is a 10-tonne xenon time projection chamber optimized for the detection of dark matter particles, that is expected to start operating in 2021 at Sanford Underground Research Facility, USA. Its large mass of natural xenon provides an exceptional opportunity to search for the double beta decay of 134Xe, for which xenon detectors enriched in 136Xe are less effective. For the two-neutrino decay mode, LZ is predicted to exclude values of the half-life up to 1.7×1024 years at 90% confidence level (CL), and has a three-sigma observation potential of 8.7×1023 years, approaching the predictions of nuclear models. For the neutrinoless decay mode LZ, is projected to exclude values of the half-life up to 7.3×1024 years at 90% CL.
Original languageEnglish
Article number065501
JournalPhysical Review C
Volume104
Issue number6
Publication statusPublished - 10 Dec 2021

Keywords

  • physics.ins-det
  • nucl-ex

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