| Title: |
Dark Matter Search Results from 4.2 Tonne-Years of Exposure of the LUX-ZEPLIN (LZ) Experiment |
| Authors: |
Aalbers, J; Akerib, DS; Musalhi, AK Al; Alder, F; Amarasinghe, CS; Ames, A; Anderson, TJ; Angelides, N; Araújo, HM; Armstrong, JE; Arthurs, M; Baker, A; Balashov, S; Bang, J; Bargemann, JW; Barillier, EE; Bauer, D; Beattie, K; Benson, T; Bhatti, A; Biekert, A; Biesiadzinski, TP; Birch, HJ; Bishop, E; Blockinger, GM; Boxer, B; Brew, CAJ; Brás, P; Burdin, S; Buuck, M; Carmona-Benitez, MC; Carter, M; Chawla, A; Chen, H; Cherwinka, JJ; Chin, YT; Chott, NI; Converse, MV; Coronel, R; Cottle, A; Cox, G; Curran, D; Dahl, CE; Darlington, I; Dave, S; David, A; Delgaudio, J; Dey, S; de Viveiros, L; Di Felice, L; Ding, C; Dobson, JEY; Druszkiewicz, E; Dubey, S; Eriksen, SR; Fan, A; Fayer, S; Fearon, NM; Fieldhouse, N; Fiorucci, S; Flaecher, H; Fraser, ED; Fruth, TMA; Gaitskell, RJ; Geffre, A; Genovesi, J; Ghag, C; Ghosh, A; Gibbons, R; Gokhale, S; Green, J; van der Grinten, MGD; Haiston, JJ; Hall, CR; Hall, TJ; Han, S; Hartigan-O’Connor, E; Haselschwardt, SJ; Hernandez, MA; Hertel, SA; Heuermann, G; Homenides, GJ; Horn, M; Huang, DQ; Hunt, D; Jacquet, E; James, RS; Johnson, J; Kaboth, AC; Kamaha, AC; K., Meghna K; Khaitan, D; Khazov, A; Khurana, I; Kim, J; Kim, YD; Kingston, J; Kirk, R; Kodroff, D; Korley, L |
| Source: |
Physical Review Letters, vol 135, iss 1 |
| Publisher Information: |
eScholarship, University of California |
| Publication Year: |
2025 |
| Collection: |
University of California: eScholarship |
| Subject Terms: |
5106 Nuclear and Plasma Physics (for-2020); 5107 Particle and High Energy Physics (for-2020); 51 Physical Sciences (for-2020); LZ Collaboration; 01 Mathematical Sciences (for); 02 Physical Sciences (for); 09 Engineering (for); General Physics (science-metrix); 40 Engineering (for-2020); 49 Mathematical sciences (for-2020) |
| Description: |
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}. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
unknown |
| Relation: |
qt7wq7p6f5; https://escholarship.org/uc/item/7wq7p6f5; https://escholarship.org/content/qt7wq7p6f5/qt7wq7p6f5.pdf |
| DOI: |
10.1103/4dyc-z8zf |
| Availability: |
https://escholarship.org/uc/item/7wq7p6f5; https://escholarship.org/content/qt7wq7p6f5/qt7wq7p6f5.pdf; https://doi.org/10.1103/4dyc-z8zf |
| Rights: |
public |
| Accession Number: |
edsbas.7983596C |
| Database: |
BASE |