Accès ouvert déclaré
2025
preprint
Study of few-electron backgrounds in the LUX-ZEPLIN detector
D. S. Akerib, A. K. Al Musalhi, F. Alder, J.O. Almquist, C. S. Amarasinghe, A. Ames, Tyler Anderson, N. Angelides, H. M. Araújo, J. E. Armstrong, M. Arthurs, Andy Baker, S. Balashov, J. Bang, J. W. Bargemann, E. E. Barillier, K. Beattie, Theophilus Benson, A. Bhatti, T. P. Biesiadzinski, H. J. Birch, E. Bishop, G. M. Blockinger, B. Boxer, C. Brew, P. Brás, S. Burdin, M. C. Carmona-Benitez, M. Carter, A. Chawla, H. Chen, Y. T. Chin, N. Chott, Sylvie Contreras, M. V. Converse, R. Coronel, A. Cottle, G. Cox, D. Curran, C. E. Dahl, I. Darlington, Sandeep S. Davé, A. David, John M. DelGaudio, Sourav Dey, L. de Viveiros, L. Di Felice, C. Ding, J. E. Y. Dobson, E. Druszkiewicz, S. Dubey, C. L. Dunbar, S. R. Eriksen, A. Fan, N. M. Fearon, N. Fieldhouse, S. Fiorucci, H. Flaecher, E. D. Fraser, T. 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. Hall, T. A. Hall, S. J. Haselschwardt, S. A. Hertel, G. J. Homenides, M. Horn, D. Q. Huang, D. Hunt, E. Jacquet, R. S. James, K. D. Jenkins, A. C. Kaboth, A. C. Kamaha, M. Kannichankandy, D. Khaitan, A. Khazov, J. Kim, Y. D. Kim, J. Kingston, D. Kodroff, E. V. Korolkova, H. Kraus, S. Kravitz, L. Kreczko, V. Kudryavtsev, C. Lawes, D. S. Leonard, K. T. Lesko, C. Levy, J. Lin, A. Lindote, W. H. Lippincott, John A. Long, I. Lopes, W. Lorenzon, C. Lü, S. Luitz, P. A. Majewski, A. Manalaysay, R. L. Mannino, C. Maupin, M. E. McCarthy, D. N. McKinsey, J. McLaughlin, J. B. Mclaughlin, R. McMonigle, B. Mitra, E. Mizrachi, M. E. Monzani, E. Morrison, B. J. Mount, M. Murdy, A. St. J. Murphy, H. N. Nelson, F. Neves, A. D. Nguyen, C. L. O'Brien, I. Olcina, K. C. Oliver-Mallory, J. Orpwood, K. Y. Oyulmaz, K. J. Palladino, N. J. Pannifer, N. Parveen, S. J. Patton, Gabriel Pereira, E. Perry, T. Pershing, A. Piepke, S. S. Poudel, Y. Qie, J. Reichenbacher, C. A. Rhyne, G. R. C. Rischbieter, Edwin L. Ritchey, H. S. Riyat, R. Rosero, T. Rushton, D. Rynders, S. Saltão, D. Santone, A. B. M. R. Sazzad, R. W. Schnee, G. Sehr, B.D. Shafer, S. Shaw, K. Shi, T. Shutt, C. Silva, G. Sinev, J. Siniscalco, A. M. Slivar, R. Smith, V. N. Solovov, P. Sorensen, J. Soria, A. Stevens, T. J. Sumner, Anthony C. Swain, M. Szydagis, D. R. Tiedt, M. Timalsina, Z. Tong, D. R. Tovey, J. Tranter, M. Trask, M. Tripathi, A. Usón, A. C. Vaitkus, O. Valentino, V. Velan, Xu Wang, J. J. Wang, Yifang Wang, L. Weeldreyer, T. J. Whitis, K. Wild, Levi John Wolf, F. L. H. Wolfs, S. Woodford, D. Woodward, Catherine Wright, Q. Xia, Jin-Long Xu, Y. Xu, M. Yeh, D. Yeum, W. Zha, Huaqiao Zhang, T. Zhang
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Le résumé fourni par la source
The LUX-ZEPLIN (LZ) experiment aims to detect rare interactions between dark matter particles and xenon. Although the detector is designed to be the most sensitive to GeV/$c^2$--TeV/$c^2$ Weakly Interacting Massive Particles (WIMPs), it is also capable of measuring low-energy ionization signals down to a single electron that may be produced by scatters of sub-GeV/$c^2$ dark matter. The major challenge in exploiting this sensitivity is to understand and suppress the ionization background in the few-electron regime. We report a characterization of the delayed electron backgrounds following energy depositions in the LZ detector under different detector conditions. In addition, we quantify the probability for photons to be emitted in coincidence with electron emission from the high voltage grids. We then demonstrate that spontaneous grid electron emission can be identified and rejected with a high efficiency using a coincident photon tag, which provides a tool to improve the sensitivity of future dark matter searches.
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Les sujets associés
Dark Matter and Cosmic PhenomenaParticle Detector Development and PerformanceParticle physics theoretical and experimental studies