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, 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.

High Energy Physics - Experiment

arXiv:2410.17036 (hep-ex)

[Submitted on 22 Oct 2024 (v1), last revised 3 Nov 2024 (this version, v2)]

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

Authors:J. Aalbers, D. S. Akerib, A. K. Al Musalhi, F. Alder, C. S. Amarasinghe, A. Ames, T. J. Anderson, N. Angelides, H. M. Araújo, J. E. Armstrong, M. Arthurs, A. Baker, S. Balashov, J. Bang, J. W. Bargemann, E. E. Barillier, D. Bauer, K. Beattie, T. Benson, A. Bhatti, A. Biekert, T. P. Biesiadzinski, H. J. Birch, E. Bishop, G. M. Blockinger, B. Boxer, C. A. J. Brew, P. Brás, S. Burdin, M. Buuck, M. C. Carmona-Benitez, M. Carter, A. Chawla, H. Chen, J. J. Cherwinka, Y. T. Chin, N. I. Chott, M. V. Converse, R. Coronel, A. Cottle, G. Cox, D. Curran, C. E. Dahl, I. Darlington, S. Dave, A. David, J. Delgaudio, S. Dey, L. de Viveiros, L. Di Felice, C. Ding, J. E. Y. Dobson, E. Druszkiewicz, S. Dubey, S. R. Eriksen, A. Fan, S. Fayer, N. M. Fearon, N. Fieldhouse, S. Fiorucci, H. Flaecher, E. D. Fraser, T. M. A. Fruth, R. J. Gaitskell, A. Geffre, J. Genovesi, C. Ghag, A. Ghosh, R. Gibbons, S. Gokhale, J. Green, M. G. D. van der Grinten, J. J. Haiston, C. R. Hall, T. J. Hall, S. Han, E. Hartigan-O'Connor, S. J. Haselschwardt, M. A. Hernandez, S. A. Hertel, G. Heuermann, G. J. Homenides, M. Horn, D. Q. Huang, D. Hunt, E. Jacquet, R. S. James, J. Johnson, A. C. Kaboth, A. C. Kamaha, Meghna K. K., D. Khaitan, A. Khazov, I. Khurana, J. Kim, Y. D. Kim, J. Kingston, R. Kirk, D. Kodroff, L. Korley et al. (118 additional authors not shown)

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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 $4.2\pm0.1$ tonne-years from 280 live days of LZ operation, of which $3.3\pm0.1$ tonne-years and 220 live days are new. A technique to actively tag background electronic recoils from $^{214}$Pb $\beta$ 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 data set 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 $\geq$9 GeV/$c^2$. The strongest SI exclusion set is $2.1\times10^{-48}$ cm$^{2}$ at the 90% confidence level at a mass of 36 GeV/$c^2$, and the best SI median sensitivity achieved is $5.0\times10^{-48}$ cm$^{2}$ for a mass of 40 GeV/$c^2$.

Comments:	9 pages, 7 figures. See this https URL for a data release related to this paper
Subjects:	High Energy Physics - Experiment (hep-ex)
Cite as:	arXiv:2410.17036 [hep-ex]
	(or arXiv:2410.17036v2 [hep-ex] for this version)
	https://doi.org/10.48550/arXiv.2410.17036

Submission history

From: Amy Cottle [view email]
[v1] Tue, 22 Oct 2024 14:07:18 UTC (993 KB)
[v2] Sun, 3 Nov 2024 18:41:11 UTC (993 KB)

High Energy Physics - Experiment

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

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High Energy Physics - Experiment

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

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