Searching for Two-Neutrino and Neutrinoless Double Beta Decay of Xe 134 with the PandaX-4T Experiment

PandaX Collaboration

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15 Scopus citations

Abstract

Xe134 is a candidate isotope for neutrinoless double beta decay (0νββ) search. In addition, the two-neutrino case (2νββ) allowed by the standard model of particle physics has not yet been observed. With the 656-kg natural xenon in the fiducial volume of the PandaX-4T detector, which contains 10.4% of Xe134, and its initial 94.9-day exposure, we have established the most stringent constraints on 2νββ and 0νββ of Xe134 half-lives, with limits of 2.8×1022 yr and 3.0×1023 yr at 90% confidence level, respectively. The 2νββ (0νββ) limit surpasses the previously reported best result by a factor of 32 (2.7), highlighting the potential of large monolithic natural xenon detectors for double beta decay searches.

Original languageEnglish (US)
Article number152502
JournalPhysical review letters
Volume132
Issue number15
DOIs
StatePublished - Apr 12 2024
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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