2024/12/18 by PandaX Collaboration, Zhang, Shu, Bo, Zihao +99 · 1 citation
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Nuclear Experiment (nucl-ex)
paper · doi:10.48550/arxiv.2412.13979
We report the search for neutrinoless double-beta decay of 136Xe from the PandaX-4T experiment with a 3.7-tonne natural xenon target. The data reconstruction and the background modeling are optimized in the MeV energy region. A blind analysis is performed with data from the commissioning run and the first science run. No significant excess of signal over the background is observed. A lower limit on the half-life of 136Xe neutrinoless double-beta decay is established to be 2.1 × 1024~yr at the 90% confidence level, with a 136Xe exposure of 44.6~kg⋅year. Our result represents the most stringent constraint from a natural xenon detector to date.