{"paper":{"title":"Two-neutrino double electron capture of $^{124}$Xe in the first LUX-ZEPLIN exposure","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"nucl-ex","authors_text":"A. Ames, A. Baker, A. Bhatti, A. Biekert, A. B. M. R. Sazzad, A. Chawla, A. C. Kaboth, A. C. Kamaha, A. Cottle, A. C. Vaitkus, A. David, A. Fan, A. Geffre, A. K. Al Musalhi, A. Khazov, A. Lindote, A. Manalaysay, A. Monte, A. Naylor, A. Nguyen, A. Piepke, A. Stevens, A. St. J. Murphy, A. Vacheret, A. Wang, B. Boxer, B. J. Mount, B. Penning, B. Shafer, B. Suerfu, C. A. J. Brew, C. A. Rhyne, C. Ding, C. E. Dahl, C. Ghag, C. J. Wright, C. Levy, C. L. O'Brien, C. Lu, C. Maupin, C. R. Hall, C. S. Amarasinghe, C. Silva, D. Curran, D. Hunt, D. Khaitan, D. Kodroff, D. N. McKinsey, D. Q. Huang, D. R. Tiedt, D. R. Tovey, D. Rynders, D. S. Akerib, D. Santone, D. S. Leonard, D. Woodward, D. Yeum, E. A. Zweig, E. Bishop, E. D. Fraser, E. Druszkiewicz, E. E. Barillier, E. Hartigan-O'Connor, E. Jacquet, E. Mizrachi, E. Morrison, E. Perry, E. Ritchey, E. V. Korolkova, F. Alder, F. L. H. Wolfs, F. Neves, G. Cox, G. Heuermann, G. J. Homenides, G. M. Blockinger, G. McDowell, G. Pereira, G. R. C. Rischbieter, G. Sehr, G. Sinev, H. Chen, H. Flaecher, H. J. Birch, H. Kraus, H. M. Ara\\'ujo, H. N. Nelson, H. S. Riyat, I. Khurana, I. Olcina, J. Aalbers, J. Bang, J. B. McLaughlin, J. Delgaudio, J. E. Armstrong, J. E. Y. Dobson, J. Genovesi, J. Green, J. J. Haiston, J. Johnson, J. J. Silk, J. J. Wang, J. Kim, J. Kingston, J. Lin, J. Mclaughlin, J. Orpwood, J. Palmer, J. Reichenbacher, J. R. Watson, J. Siniscalco, J. Soria, J. Tranter, J. W. Bargemann, J. Xu, K. Beattie, K. C. Oliver-Mallory, K. J. Palladino, K. Stifter, K. T. Lesko, K. Wild, K. Y Oyulmaz, L. de Viveiros, L. Di Felice, L. Korley, L. Kreczko, L. Weeldreyer, L. Wolf, M. A. Hernandez, M. Arthurs, M. Buuck, M. Carter, M. C. Carmona-Benitez, M. E. McCarthy, M. E. Monzani, M. G. D. van der Grinten, M. Horn, M. I. Lopes, M. Kannichankandy, M. Murdy, M. Szydagis, M. Timalsina, M. Trask, M. Tripathi, M. V. Converse, M. Williams, M. Yeh, N. Angelides, N. Fieldhouse, N. I. Chott, N. J. Pannifer, N. M. Fearon, N. Parveen, O. Valentino, P. A. Majewski, P. Br\\'as, P. Sorensen, Q. Riffard, Q. Xia, R. Coronel, R. Gibbons, R. J. Gaitskell, R. Kirk, R. L. Mannino, R. McMonigle, R. Rosero, R. S. James, R. Smith, R. W. Schnee, S. A. Hertel, S. Balashov, S. Burdin, S. Dey, S. Dubey, S. Fiorucci, S. Gokhale, S. Han, S. J. Haselschwardt, S. J. Patton, S. Kravitz, S. Luitz, S. R. Eriksen, S. Shaw, S. Woodford, T. J. Anderson, T. J. Sumner, T. J. Whitis, T. M. A. Fruth, T. P. Biesiadzinski, T. Pershing, T. Rushton, T. Shutt, V. A. Kudryavtsev, V. N. Solovov, V. Velan, W. H. Lippincott, W. J. Wisniewski, W. Lorenzon, W. Zha, Y. D. Kim, Y. Qie, Y. T. Chin, Y. Wang, Y. Xu, Z. Tong","submitted_at":"2024-08-30T16:28:15Z","abstract_excerpt":"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 $^{124}$Xe through the process of two-neutrino double electron capture (2$\\nu$2EC), utilizing a $1.39\\,\\mathrm{kg} \\times \\mathrm{yr}$ isotopic exposure from the first LZ science run. A half-life of $T_{1/2}^{2\\nu2\\mathrm{EC}} = (1.09 \\pm 0.14_{\\text{stat}} \\pm 0.05_{\\text{sys}}) \\times 10^{22}\\,\\mathrm{yr}$ is observed with a statistical significance of $8.3\\,\\sigma$, in agreement with literature. First empiri"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.17391","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2408.17391/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}