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Physical review letters · 2025

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

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Aalbers J, Akerib D S, Musalhi A K Al, Alder F, Amarasinghe C S, Ames A, Anderson T J, Angelides N, Araújo H M, Armstrong J E, Arthurs M, Baker A, Balashov S, Bang J, Bargemann J W, Barillier E E, Bauer D, Beattie K, Benson T, Bhatti A, Biekert A, Biesiadzinski T P, Birch H J, Bishop E, Blockinger G M, Boxer B, Brew C A J, Brás P, Burdin S, Buuck M, Carmona-Benitez M C, Carter M, Chawla A, Chen H, Cherwinka J J, Chin Y T, Chott N I, Converse M V, Coronel R, Cottle A, Cox G, Curran D, Dahl C E, Darlington I, Dave S, David A, Delgaudio J, Dey S, de Viveiros L, Di Felice L, Ding C, Dobson J E Y, Druszkiewicz E, Dubey S, Eriksen S R, Fan A, Fayer S, Fearon N M, Fieldhouse N, Fiorucci S, Flaecher H, Fraser E D, Fruth T M A, Gaitskell R J, Geffre A, Genovesi J, Ghag C, Ghosh A, Gibbons R, Gokhale S, Green J, van der Grinten M G D, Haiston J J, Hall C R, Hall T 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 D, Jacquet E, James R S, Johnson J, Kaboth A C, Kamaha A C, K Meghna K, Khaitan D, Khazov A, Khurana I, Kim J, Kim Y D, Kingston J, Kirk R, 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 M I, Lorenzon W, Lu C, Luitz S, Majewski P A, Manalaysay A, Mannino R L, Maupin C, McCarthy M E, McDowell G, McKinsey D N, McLaughlin 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 N, Neves F, Nguyen A, O'Brien C L, Olcina I, Oliver-Mallory K C, Orpwood J, Oyulmaz K Y, Palladino K J, Palmer J, Pannifer N J, Parveen N, Patton S J, 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 E, Riyat H S, Rosero R, Rushton T, Rynders D, Santone D, Sazzad A B M R, Schnee R W, Sehr G, Shafer B, Shaw S, Shutt T, Silk J J, Silva C, Sinev G, Siniscalco J, Smith R, Solovov V N, Sorensen 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 J, Trask M, Tripathi M, Usón A, Vacheret A, Vaitkus A C, Valentino O, Velan V, Wang A, Wang J J, Wang Y, Watson J R, Weeldreyer L, Whitis T J, Wild K, Williams M, Wisniewski W J, Wolf L, Wolfs F L H, Woodford S, Woodward D, Wright C J, Xia Q, Xu J, Xu Y, Yeh M, Yeum D, Zha W, Zweig E A, LZ Collaboration

Аннотация

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}.

ИП Урсолов Владлен Сергеевич

ИНН 500118482352 · ОГРНИП 314500117700049

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