Double beta decay searches of Xe-134, Xe-126 and Xe-124 with large scale Xe detectors

Abstract

The sensitivity for double beta decay studies of Xe-134 and Xe-124 is investigated assuming a potential large scale Xe experiment developed for dark matter searches depleted in Xe-136. The opportunity for an observation of the 2nu double beta decay of Xe-134 is explored for various scenarios. A positive observation should be possible for all calculated nuclear matrix elements. The detection of 2$\nu$ ECEC of Xe-124 can be probed in all scenarios covering the theoretical predicted half-life uncertainties and a potential search for Xe-126 is discussed. The sensitivity to beta+/EC decay of Xe-124 is discussed and a positive observation might be possible, while beta+/beta+ decay still remains unobservable. The performed studies take into account solar pp-neutrino interactions, ${}^{85}$Kr beta decay and remaining Xe-136 double beta decay as background components in the depleted detector.

12 pages, 8 figures, published in Journal of Phys. G

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• Phase space factors for double-$\beta$ decay
• Nuclear matrix elements for double-β decay
• \textsc{MaGe} - a {\sc Geant4}-based Monte Carlo Application Framework for Low-background Germanium Experiments
• Leptogenesis in the Universe
• Nuclear deformation and the two neutrino double-βdecay in ^{124,126}Xe,^{128,130}Te, ^{130,132}Ba and ^{150}Nd isotopes
• Effect of molecular rotation on enantioseparation

Cited by in corpus (8)

• DARWIN: towards the ultimate dark matter detector
• A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
• Direct Detection of Dark Matter -- APPEC Committee Report
• Searching for Two-Neutrino and Neutrinoless Double Beta Decay of ${}^{134}$Xe with the PandaX-4T Experiment
• Search for Two-Neutrino Double Electron Capture of ${}^{124}$Xe with XENON100
• Detection prospects for the second-order weak decays of ${}^{124}$Xe in multi-tonne xenon time projection chambers
• Projected sensitivity of the LUX-ZEPLIN (LZ) experiment to the two-neutrino and neutrinoless double beta decays of ${}^{134}$Xe
• Solar Neutrinos as Background to Neutrinoless Double-beta Decay Experiments