Abstract
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•yr, or equivalently 22.2 kg•yr of 136Xe exposure. At the region around 136Xe decay Q-value of 2458 keV, the energy resolution of PandaX-II is 4.2%. We find no evidence of NLDBD in PandaX-II and establish a lower limit for decay half-life of 2.1 × 1023 yr at the 90% confidence level, which corresponds to an effective Majorana neutrino mass mββ < (1.4 3.7) eV. This is the first NLDBD result reported from a dual-phase xenon experiment.
| Original language | English (US) |
|---|---|
| Article number | 113001 |
| Journal | Chinese Physics C |
| Volume | 43 |
| Issue number | 11 |
| DOIs | |
| State | Published - 2019 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Instrumentation
- Astronomy and Astrophysics
Keywords
- dark matter
- liquid xenon detector
- neutrino-less double beta decay
- underground physics
Fingerprint
Dive into the research topics of 'Searching for neutrino-less double beta decay of 136Xe with PandaX-II liquid xenon detector'. Together they form a unique fingerprint.Cite this
- APA
- Author
- BIBTEX
- Harvard
- Standard
- RIS
- Vancouver