Searches for Double Beta Decay of ${}^{134}$Xe with EXO-200

Abstract

Searches for double beta decay of ${}^{134}$Xe were performed with EXO-200, a single-phase liquid xenon detector designed to search for neutrinoless double beta decay of ${}^{136}$Xe. Using an exposure of $29.6\text{ kg}\cdot \text{yr}$, the lower limits of ${\text{T}}_{1/2}^{2\nu \beta \beta }>8.7\cdot 10^{20}\text{ yr}$ and ${\text{T}}_{1/2}^{0\nu \beta \beta }>1.1\cdot 10^{23}\text{ yr}$ at 90% confidence level were derived, with corresponding half-life sensitivities of $1.2\cdot 10^{21}\text{ yr}$ and $1.9\cdot 10^{23}\text{ yr}$. These limits exceed those in the literature for ${}^{134}$Xe, improving by factors of nearly $10^5$ and 2 for the two antineutrino and neutrinoless modes, respectively.

arXiv comment8 pages, 4 figures

References in corpus (14)

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• Xenon purity analysis for EXO-200 via mass spectrometry
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Cited by in corpus (9)

• A Review of Basic Energy Reconstruction Techniques in Liquid Xenon and Argon Detectors for Dark Matter and Neutrino Physics Using NEST
• Double-Weak Decays of ${}^{124}$Xe and ${}^{136}$Xe in the XENON1T and XENONnT Experiments
• Unraveling the $0\nu \beta \beta$ Decay Mechanisms
• Searching for Two-Neutrino and Neutrinoless Double Beta Decay of ${}^{134}$Xe with the PandaX-4T Experiment
• Measurements of electron transport in liquid and gas Xenon using a laser-driven photocathode
• Cosmogenic activation in double beta decay experiments
• Projected sensitivity of the LUX-ZEPLIN (LZ) experiment to the two-neutrino and neutrinoless double beta decays of ${}^{134}$Xe
• Search for Two-neutrino Double-Beta Decay of ${}^{136}\mathrm{Xe}$ to the $0_1^{+}$ excited state of ${}^{136}\mathrm{Ba}$ with the Complete EXO-200 Dataset
• Search for Double Beta Decays of ${}^{134}$Xe with EXO-200 Phase II