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

作者：J. Aalbers, D. Akerib, A. Musalhi, F. Alder, C. Amarasinghe, A. Ames, T. Anderson, N. Angelides, H. M. Ara'ujo, J. E. Armstrong, M. Arthurs, A. Baker, S. Balashov, J. Bang, J. Bargemann, E. Barillier, D. Bauer, K. Beattie, T. Benson, A. Bhatti, A. Biekert, T. P. Biesiadzinski, H. Birch, E. Bishop, G. Blockinger, B. Boxer, C. Brew, P. Br'as, S. Burdin, M. Buuck, M. Carmona-Benitez, M. Carter, A. Chawla, H. Chen, J. Cherwinka, Y. Chin, N. Chott, M. Converse, R. Coronel, A. Cottle, G. Cox, D. Curran, C. Dahl, I. Darlington, S. Dave, A. David, J. Delgaudio, S. Dey, L. de Viveiros, L. Di Felice, C. Ding, J. Dobson, E. Druszkiewicz, S. Dubey, S. R. Eriksen, A. Fan, S. Fayer, N. Fearon, N. Fieldhouse, S. Fiorucci, H. Flaecher, E. Fraser, T. Fruth, R. Gaitskell, A. Geffré, J. Genovesi, C. Ghag, A. Ghosh, R. Gibbons, S. Gokhale, J. Green, M. van der Grinten, J. Haiston, C. Hall, T. Hall, S. Han, E. Hartigan-O’Connor, S. Haselschwardt, M. Hernandez, S. Hertel, G. Heuermann, G. Homenides, M. Horn, D. Huang, D. Hunt, E. Jacquet, R. James, J. Johnson, A. Kaboth, A. Kamaha, Meghna K K, D. Khaitan, A. Khazov, I. Khurana, J. Kim, Y. Kim, J. Kingston, R. Kirk, D. Kodroff, L. Korley, E. Korolkova, H. Kraus, S. Kravitz, L. Kreczko, V. Kudryavtsev, C. Lawes, D. Leonard, K. Lesko, C. Levy, J. Lin, A. Lindote, W. Lippincott, M. Lopes, W. Lorenzon, C. Lu, S. Luitz, P. Majewski, A. Manalaysay, R. Mannino, C. Maupin, M. McCarthy, G. McDowell, D. McKinsey, J. Mclaughlin, J. Mclaughlin, R. McMonigle, E. Mizrachi, A. Monte, M. Monzani, J. D. Mendoza, E. Morrison, B. Mount, M. Murdy, A. Murphy, A. Naylor, H. Nelson, F. Neves, A. Nguyen, C. O’Brien, I. Olcina, K. Oliver-Mallory, J. Orpwood, K. Oyulmaz, K. Palladino, J. Palmer, N. J. Pannifer, N. Parveen, S. Patton, B. Penning, G. Pereira, E. Perry, T. Pershing, A. Piepke, Y. Qie, J. Reichenbacher, C. Rhyne, A. Richards, Q. Riffard, G. Rischbieter, E. Ritchey, H. Riyat, R. Rosero, T. Rushton, D. Rynders, D. Santone, A. Sazzad, R. Schnee, G. Sehr, B. Shafer, S. Shaw, T. Shutt, J. Silk, C. Silva, G. Sinev, J. Siniscalco, R. Smith, V. Solovov, P. Sorensen, J. Soria, I. Stancu, A. Stevens, K. Stifter, B. Suerfu, T. Sumner, M. Szydagis, D. Tiedt, M. Timalsina, Z. Tong, D. Tovey, J. Tranter, M. Trask, M. Tripathi, A. Us'on, A. Vacheret, A. Vaitkus, O. Valentino, V. Velan, A. Wang, J. Wang, Y. Wang, J. R. Watson, L. Weeldreyer, T. Whitis, K. Wild, M. Williams, W. Wiśniewski, L. Wolf, F. Wolfs, S. Woodford, D. Woodward, C. Wright, Q. Xia, J. Xu, Y. Xu, M. Yeh, D. Yeum, W. Zha, E. Zweig · 发表于：Physical Review Letters · 年份：2024 · DOI：10.1103/4dyc-z8zf · 被引用次数：351 · 研究领域：Medicine、Physics

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 for an excess over expected backgrounds. World-leading constraints are placed on spin-independent (SI) and spin-dependent WIMP-nucleon cross sections for masses ≥9  GeV/c^{2}. The strongest SI exclusion set is 2.2×10^{-48}  cm^{2} at the 90% confidence level and the best SI median sensitivity achieved is 5.1×10^{-48}  cm^{2}, both for a mass of 40  GeV/c^{2}.