论文标题

Lux-Zeplin(LZ)暗物质实验的背景确定

Background Determination for the LUX-ZEPLIN (LZ) Dark Matter Experiment

论文作者

Aalbers, J., Akerib, D. S., Musalhi, A. K. Al, Alder, F., Alsum, S. K., Amarasinghe, C. S., Ames, A., Anderson, T. J., Angelides, N., Araújo, H. M., Armstrong, J. E., Arthurs, M., Baker, A., Bang, J., Bargemann, J. W., Baxter, A., Beattie, K., Beltrame, P., Bernard, E. P., Bhatti, A., Biekert, A., Biesiadzinski, T. P., Birch, H. J., Blockinger, G. M., Boxer, B., Brew, C. A. J., Brás, P., Burdin, S., Buuck, M., Cabrita, R., Carmona-Benitez, M. C., Chan, C., Chawla, A., Chen, H., Chiang, A. P. S., Chott, N. I., Converse, M. V., Cottle, A., Cox, G., Creaner, O., Dahl, C. E., David, A., Dey, S., de Viveiros, L., Ding, C., Dobson, J. E. Y., Druszkiewicz, E., Eriksen, S. R., Fan, A., Fearon, N. M., Fiorucci, S., Flaecher, H., Fraser, E. D., Fruth, T., Gaitskell, R. J., Genovesi, J., Ghag, C., Gibbons, R., Gilchriese, M. G. D., Gokhale, S., Green, J., van der Grinten, M. G. D., Gwilliam, C. B., Hall, C. R., Han, S., Hartigan-O'Connor, E., Haselschwardt, S. J., Hertel, S. A., Heuermann, G., Horn, M., Huang, D. Q., Hunt, D., Ignarra, C. M., Jacobsen, R. G., Jahangir, O., James, R. S., Johnson, J., Kaboth, A. C., Kamaha, A. C., Khaitan, D., Khurana, I., Kirk, R., Kodroff, D., Korley, L., Korolkova, E. V., Kraus, H., Kravitz, S., Kreczko, L., Krikler, B., Kudryavtsev, V. A., Leason, E. A., Lee, J., Leonard, D. S., Lesko, K. T., Levy, C., Lin, J., Lindote, A., Linehan, R., Lippincott, W. H., Liu, X., Lopes, M. I., Asamar, E. Lopez, Paredes, B. López, Lorenzon, W., Lu, C., Luitz, S., Majewski, P. A., Manalaysay, A., Mannino, R. L., Marangou, N., McCarthy, M. E., McKinsey, D. N., McLaughlin, J., Miller, E. H., Mizrachi, E., Monte, A., Monzani, M. E., Mendoza, J. D. Morales, Morrison, E., Mount, B. J., Murdy, M., Murphy, A. St. J., Naim, D., Naylor, A., Nedlik, C., Nelson, H. N., Neves, F., Nguyen, A., Nikoleyczik, J. A., Olcina, I., Oliver-Mallory, K. C., Orpwood, J., Palladino, K. J., Palmer, J., Parveen, N., Patton, S. J., Penning, B., Pereira, G., Perry, E., Pershing, T., Piepke, A., Porzio, D., Poudel, S., Qie, Y., Reichenbacher, J., Rhyne, C. A., Riffard, Q., Rischbieter, G. R. C., Riyat, H. S., Rosero, R., Rossiter, P., Rushton, T., Santone, D., Sazzad, A. B. M. R., Schnee, R. W., Shaw, S., Shutt, T., Silk, J. J., Silva, C., Sinev, G., Smith, R., Solmaz, M., Solovov, V. N., Sorensen, P., Soria, J., Stancu, I., Stevens, A., Stifter, K., Suerfu, B., Sumner, T. J., Swanson, N., Szydagis, M., Taylor, R., Taylor, W. C., Temples, D. J., Terman, P. A., Tiedt, D. R., Timalsina, M., Tong, Z., Tovey, D. R., Tranter, J., Trask, M., Tripathi, M., Tronstad, D. R., Turner, W., Utku, U., Vaitkus, A. C., Wang, A., Wang, J. J., Wang, W., Wang, Y., Watson, J. R., Webb, R. C., Whitis, T. J., Williams, M., Wolfs, F. L. H., Woodford, S., Woodward, D., Wright, C. J., Xia, Q., Xiang, X., Xu, J., Yeh, M.

论文摘要

Lux-Zeplin实验最近报告了Wimp-Nucleus相互作用的限制,从最初的科学运行开始,至$ 9.2 \ times10^{ - 48} $ cm $^2 $,用于36 GEV/C $^2 $ wimp的自旋依赖性交互,以90%的置信度达到90%。在本文中,我们对对此结果以及其他即将进行的物理学分析的背景进行了全面分析,包括中微子双β衰减搜索和lux-Zeplin数据的有效现场理论解释。我们确认,批量和固定放射性背景的原位确定与前静脉测定的期望一致。应用WIMP搜索标准后观察到的背景速率为$(6.3 \ pm0.5)\ times10^{ - 5} $ events/kev $ _ {ee} $/kg/day在低能区域,比卢克斯(Lux)实验报告的等价率低约60倍。

The LUX-ZEPLIN experiment recently reported limits on WIMP-nucleus interactions from its initial science run, down to $9.2\times10^{-48}$ cm$^2$ for the spin-independent interaction of a 36 GeV/c$^2$ WIMP at 90% confidence level. In this paper, we present a comprehensive analysis of the backgrounds important for this result and for other upcoming physics analyses, including neutrinoless double-beta decay searches and effective field theory interpretations of LUX-ZEPLIN data. We confirm that the in-situ determinations of bulk and fixed radioactive backgrounds are consistent with expectations from the ex-situ assays. The observed background rate after WIMP search criteria were applied was $(6.3\pm0.5)\times10^{-5}$ events/keV$_{ee}$/kg/day in the low-energy region, approximately 60 times lower than the equivalent rate reported by the LUX experiment.

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