@article{2208a5eb2058476d9d0ee8a4b2580047,
title = "Two-neutrino double electron capture of 124Xe 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 T12/n22EC = (1.09 ± 0.14 stat ± 0.05sys ) × 1022 yr 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.",
author = "\{The LZ collaboration\} and J. Aalbers and Akerib, \{D. S.\} and \{Al Musalhi\}, \{A. K.\} and F. Alder and Amarasinghe, \{C. S.\} and A. Ames and Anderson, \{T. J.\} and N. Angelides and Ara{\'u}jo, \{H. M.\} and Armstrong, \{J. E.\} and M. Arthurs and A. Baker and S. Balashov and J. Bang and Bargemann, \{J. W.\} and Barillier, \{E. E.\} and K. Beattie and A. Bhatti and A. Biekert and Biesiadzinski, \{T. P.\} and Birch, \{H. J.\} and E. Bishop and Blockinger, \{G. M.\} and B. Boxer and Brew, \{C. A.J.\} and P. Br{\'a}s and S. Burdin and M. Buuck and Carmona-Benitez, \{M. C.\} and M. Carter and A. Chawla and H. Chen and Chin, \{Y. T.\} and Chott, \{N. I.\} and Converse, \{M. V.\} and R. Coronel and A. Cottle and G. Cox and D. Curran and Dahl, \{C. E.\} and A. David and J. Delgaudio and S. Dey and \{de Viveiros\}, L. and \{Di Felice\}, L. and C. Ding and Dobson, \{J. E.Y.\} and E. Druszkiewicz and S. Dubey and Eriksen, \{S. R.\}",
note = "Publisher Copyright: {\textcopyright} 2024 The Author(s).",
year = "2025",
month = jan,
day = "31",
doi = "10.1088/1361-6471/ad9039",
language = "English (US)",
volume = "52",
journal = "Journal of Physics G: Nuclear and Particle Physics",
issn = "0954-3899",
publisher = "IOP Publishing Ltd.",
number = "1",
}