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  • LUX Collaboration; Akerib, D S; Alsum, S; Araújo, H M; Bai, X; Balajthy, J; Baxter, A; Bernard, E P; Bernstein, A; Biesiadzinski, T P; Boulton, E M; Boxer, B; Brás, P; Burdin, S; Byram, D; Carmona-Benitez, M C; Chan, C; Cutter, J E; de Viveiros, L; Druszkiewicz, E; Fan, A; Fiorucci, S; Gaitskell, R J; Ghag, C; Gilchriese, M G D; Gwilliam, C; Hall, C R; Haselschwardt, S J; Hertel, S A; Hogan, D P; Horn, M; Huang, D Q; Ignarra, C M; Jacobsen, R G; Jahangir, O; W Ji; Kamdin, K; Kazkaz, K; Khaitan, D; Korolkova, E V; Kravits, S; Kudryavtsev, V A; Leason, E; Lenardo, B G; Lesko, K T; Liao, J; Lin, J; Lindote, A; Lopes, M I; Manalaysay, A; Mannino, R L; Marangou, N; Marzioni, M F; McKinsey, D N; D -M Mei; Moongweluwan, M; Morad, J A; Murphy, A St J; Naylor, A; Nehrkorn, C; Nelson, H N; Neves, F; Nilima, A; Oliver-Mallory, K C; Palladino, K J; Pease, E K; Riffard, Q; Rischbieter, G R C; Rhyne, C; Rossiter, P; Shaw, S; Shutt, T A; Silva, C; Solmaz, M; Solovov, V N; Sorensen, P; Sumner, T J; Szydagis, M; Taylor, D J; Taylor, R; Taylor, W C; Tennyson, B P; Terman, P A; Tiedt, D R; To, W H; Tripathi, M; Tvrznikova, L; Utku, U; Uvarov, S; Vacheret, A; Velan, V; Webb, R C; White, J T; Whitis, T J; Witherell, M S; Wolfs, F L H; Woodward, D; J Xu; Zhang, C

    arXiv.org, 05/2020
    Paper, Journal Article

    Two-neutrino double electron capture is a process allowed in the Standard Model of Particle Physics. This rare decay has been observed in \(^{78}\)Kr, \(^{130}\)Ba and more recently in \(^{124}\)Xe. In this publication we report on the search for this process in \(^{124}\)Xe and \(^{126}\)Xe using the full exposure of the Large Underground Xenon (LUX) experiment, in a total of of 27769.5~kg-days. No evidence of a signal was observed, allowing us to set 90\% C.L. lower limits for the half-lives of these decays of \(2.0\times10^{21}\)~years for \(^{124}\)Xe and \(1.9\times10^{21}\)~years for \(^{126}\)Xe.