Dark Matter Search Results from    4.2        Tonne  −  Years    of Exposure of the LUX-ZEPLIN (LZ) Experiment

Aalbers, J.; Akerib, D. S.; Musalhi, A. K. Al; Alder, F.; Amarasinghe, C. S.; Ames, A.; Anderson, Tyler; Angelides, N.; Araújo, H. M.; Armstrong, J E; Arthurs, M.; Baker, Alexander A.; Balashov, S.; Bang, J.; Bargemann, J. W.; Barillier, E. E.; Bauer, D.; Beattie, K.; Benson, T.M.; Bhatti, A.; Biekert, A.; Biesiadzinski, T. P.; Birch, H. J.; Bishop, Erin; Blockinger, G. M.; Boxer, B.; Brew, C.; Brás, P.; Burdin, S.; Buuck, M.; Carmona-Benitez, M. C.; Carter, Michael; Chawla, A.; Chen, H.; Cherwinka, J. J.; Chin, Y. T.; Chott, N.; Converse, M. V.; Coronel, Ruben; Cottle, A.; Cox, G. A.; Curran, D.; Dahl, C. E.; Darlington, I.; Davé, Sandeep S.; David, A.; DelGaudio, John M.; Dey, Sourav; Viveiros, L. de; Felice, L. Di; Ding, C.; Dobson, J. E. Y.; Druszkiewicz, E.; Dubey, S.; Eriksen, S. R.; Fan, A.; Fayer, Simon; Fearon, N. M.; Fieldhouse, N.; Fiorucci, S.; Flaecher, H. U.; Fraser, E. D.; Fruth, T.; Gaitskell, R. J.; Geffre, A.; Genovesi, J.; Ghag, C.; Ghosh, A.; Gibbons, R.; Gokhale, S.; Green, Jonathan; Grinten, M. G. D. van der; Haiston, J. J.; Hall, C.; Hall, Timothy J.; Han, S.; Hartigan-O’Connor, E.; Haselschwardt, S. J.; Hernandez, M. A.; Hertel, S. A.; Heuermann, G.; Homenides, G. J.; Horn, M.; Huang, D. Q.; Hunt, Donald F.; Jacquet, E.; James, R. S.; Johnson, J.; Kaboth, A. C.; Kamaha, A.; Meghna, K K; Khaitan, D.; Khazov, A.; Khurana, I.; Kim, Junho; Kim, Y D; Kingston, Jennifer; Kirk, R. L.; Kodroff, D.; Korley, L.; Korolkova, E. V.; Kraus, H.; Kravitz, S.; Kreczko, L.; Kudryavtsev, V. A.; Lawes, C.; Leonard, D. S.; Lesko, K. T.; Levy, C.; Lin, J.; Lindote, A.; Lippincott, W. H.; Lopes, I.; Lorenzon, W.; Lu, Chih-Ting; Luitz, S.; Majewski, P. A.; Manalaysay, A.; Mannino, R. L.; Maupin, C.; McCarthy, M.; McDowell, Graham; McKinsey, D. N.; Lin, J.; Mclaughlin, J. B.; McMonigle, R.; Mizrachi, E.; Monte, A.; Monzani, M. E.; Mendoza, J. D. Morales; Morrison, E.; Mount, B. J.; Murdy, M.; Murphy, A. St. J.; Naylor, A.; Nelson, H.; Neves, F.; Nguyen, A.; O’Brien, C. L.; Olcina, I.; Oliver-Mallory, K. C.; Orpwood, J.; Oyulmaz, K. Y.; Palladino, K. J.; Palmer, J. D.; Pannifer, N. J.; Parveen, N.; Patton, Simon; Penning, B.; Pereira, G.; Perry, E; Pershing, T.; Piepke, A.; Qie, Y.; Reichenbacher, J.; Rhyne, C. A.; Richards, A.; Riffard, Q.; Rischbieter, G. R. C.; Ritchey, Edwin L.; Riyat, H. S.; Rosero, R.; Rushton, T.; Rynders, D.; Santone, D.; Sazzad, A. B. M. R.; Schnee, R. W.; Sehr, G.; Shafer, B.D.; Shaw, S.; Shutt, T.; Silk, J. J.; Silva, C.; Sinev, G.; Siniscalco, J.; Smith, R.; Solovov, V. N.; Sørensen, P.; Soria, J.; Stancu, I.; Stevens, A.; Stifter, K.; Suerfu, B.; Sumner, T. J.; Szydagis, M.; Tiedt, D. R.; Timalsina, M.; Tong, Z; Tovey, D. R.; Tranter, Jemima; Trask, M.; Tripathi, M.; Usón, A.; Vacheret, A.; Vaitkus, Audrius; Valentino, O.; Velan, V.; Wang, Ailing; Wang, J J; Wang, Y.; Watson, Jean; Weeldreyer, L.; Whitis, T. J.; Wild, K.; Williams, M.; Wisniewski, W. J.; Wolf, Levi John; Wolfs, F. L. H.; Woodford, S.; Woodward, David; Wright, Chris J.; Xia, Q.; Xu, Jing; Xu, Y.; Yeh, M.; Yeum, D.; Zha, W.; Zweig, E. A.

doi:10.1103/4dyc-z8zf

articlePhysical Review LettersMay 12, 2025HYBRID OA

Dark Matter Search Results from 4.2 Tonne − Years of Exposure of the LUX-ZEPLIN (LZ) Experiment

JAJ. Aalbers DSD. S. Akerib AKA. K. Al Musalhi FAF. Alder CSC. S. Amarasinghe

SLAC National Accelerator Laboratory · Kavli Institute for Particle Astrophysics and Cosmology · +43 more institutions

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Abstract

We report results of a search for nuclear recoils induced by weakly interacting massive particle (WIMP) dark matter using the LUX-ZEPLIN (LZ) two-phase xenon time projection chamber. This analysis uses a total exposure of 4.2±0.1 tonne-years from 280 live days of LZ operation, of which 3.3±0.1 tonne-years and 220 live days are new. A technique to actively tag background electronic recoils from ^{214}Pb β decays is featured for the first time. Enhanced electron-ion recombination is observed in two-neutrino double electron capture decays of ^{124}Xe, representing a noteworthy new background. After removal of artificial signal-like events injected into the dataset to mitigate analyzer bias, we find no evidence…

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Physics
Dark matter
Nuclear physics
Environmental science
Particle physics
Waste management
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