Searching for Neutrino-less Double Beta Decay of $^{136}$Xe with PandaX-II Liquid Xenon Detector

Understand

We report the Neutrino-less Double Beta Decay (NLDBD) search results from PandaX-II dual-phase liquid xenon time projection chamber.

• The total live time used in this analysis is 403.1 days from June 2016 to August 2018.
• With NLDBD-optimized event selection criteria, we obtain a fiducial mass of 219 kg of natural xenon.
• The accumulated xenon exposure is 242 kg$\cdot$yr, or equivalently 22.2 kg$\cdot$yr of $^{136}$Xe exposure.