Journal article
Two-neutrino double electron capture of 124 Xe in the first LUX-ZEPLIN exposure
- Abstract:
- The broad physics reach of the LUX-ZEPLIN (LZ) experiment covers rare phenomena beyond the direct detection of dark matter. We report precise measurements of the extremely rare decay of 124Xe through the process of two-neutrino double electron capture, utilizing a 1.39 kg × yr isotopic exposure from the first LZ science run. A half-life of T1/22ν2EC=(1.09±0.14stat±0.05sys)×1022yr is observed with a statistical significance of 8.3σ, in agreement with literature. First empirical measurements of the KK capture fraction relative to other K-shell modes were conducted, and demonstrate consistency with respect to recent signal models at the 1.4σ level.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Version of Record, Version of record, pdf, 717.6KB, Terms of use)
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- Publisher copy:
- 10.1088/1361-6471/ad9039
Authors
+ U.S. National Science Foundation
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- Funder identifier:
- https://ror.org/021nxhr62
+ Foundation for Science and Technology
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- Funder identifier:
- https://ror.org/00snfqn58
+ Science and Technology Facilities Council
More from this funder
- Funder identifier:
- https://ror.org/057g20z61
- Publisher:
- IOP Publishing
- Journal:
- Journal of Physics G: Nuclear and Particle Physics More from this journal
- Volume:
- 52
- Issue:
- 1
- Article number:
- 015103
- Publication date:
- 2024-12-06
- Acceptance date:
- 2024-11-08
- DOI:
- EISSN:
-
1361-6471
- ISSN:
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0954-3899
- Language:
-
English
- Keywords:
- Source identifiers:
-
2480269
- Deposit date:
-
2024-12-07
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