XENONnT 中基于离子化信号的暗物质搜索：7.8 吨年数据
高能物理 - 实验
2026-01-19 v1 宇宙学与河外天体物理
天体物理仪器与方法
高能物理 - 唯象学
仪器与探测器
摘要
我们报告了使用 XENONnT 中仅基于 S2 离子化信号的暗物质（DM）盲搜索结果，总暴露量为 ，覆盖 579 天的三个科学运行。专用的背景抑制技术和首个完整的 S2-only 背景模型提供了对 [0.5, 5.0] 核偏振和 [0.04, 0.7] 电子偏振的灵敏度。未观察到显著超出预期背景的 excess，我们设置了 90% 置信水平的上限，对 DM 质量在 3 到 8 之间的自旋独立 DM--核散射、自旋依赖 DM--中子散射，以及 DM--电子散射、轴类粒子和暗光子，改进了先前的约束。对于自旋独立 DM--核散射，我们在 DM 质量为 5 时排除了横截面积超过 cm，将 XENONnT 的灵敏度推近至其中核弹性中子-核散射（）成为不可消除背景的区域。
引用
@article{arxiv.2601.11296,
title = {Light Dark Matter Search with 7.8 Tonne-Year of Ionization-Only Data in XENONnT},
author = {E. Aprile and J. Aalbers and K. Abe and M. Adrover and S. Ahmed Maouloud and L. Althueser and B. Andrieu and E. Angelino and D. Antón Martin and S. R. Armbruster and F. Arneodo and L. Baudis and M. Bazyk and V. Beligotti and L. Bellagamba and R. Biondi and A. Bismark and K. Boese and R. M. Braun and G. Bruni and G. Bruno and R. Budnik and C. Cai and C. Capelli and J. M. R. Cardoso and A. P. Cimental Chávez and A. P. Colijn and J. Conrad and J. J. Cuenca-García and V. D'Andrea and L. C. Daniel Garcia and M. P. Decowski and A. Deisting and C. Di Donato and P. Di Gangi and S. Diglio and K. Eitel and S. el Morabit and R. Elleboro and A. Elykov and A. D. Ferella and C. Ferrari and H. Fischer and T. Flehmke and M. Flierman and R. Frankel and D. Fuchs and W. Fulgione and C. Fuselli and F. Gao and R. Giacomobono and F. Girard and R. Glade-Beucke and L. Grandi and J. Grigat and H. Guan and M. Guida and P. Gyorgy and R. Hammann and C. Hils and L. Hoetzsch and N. F. Hood and M. Iacovacci and Y. Itow and J. Jakob and F. Joerg and Y. Kaminaga and M. Kara and S. Kazama and P. Kharbanda and M. Kobayashi and D. Koke and K. Kooshkjalali and A. Kopec and H. Landsman and R. F. Lang and L. Levinson and A. Li and I. Li and S. Li and S. Liang and Z. Liang and Y. -T. Lin and S. Lindemann and M. Lindner and K. Liu and M. Liu and F. Lombardi and J. A. M. Lopes and G. M. Lucchetti and T. Luce and Y. Ma and C. Macolino and G. C. Madduri and J. Mahlstedt and F. Marignetti and T. Marrodán Undagoitia and K. Martens and J. Masbou and S. Mastroianni and V. Mazza and A. Melchiorre and J. Merz and M. Messina and A. Michel and K. Miuchi and A. Molinario and S. Moriyama and M. Murra and J. Müller and K. Ni and C. T. Oba Ishikawa and U. Oberlack and S. Ouahada and B. Paetsch and Y. Pan and Q. Pellegrini and R. Peres and J. Pienaar and M. Pierre and G. Plante and T. R. Pollmann and F. Pompa and A. Prajapati and L. Principe and J. Qin and D. Ramírez García and A. Ravindran and A. Razeto and R. Singh and L. Sanchez and J. M. F. dos Santos and I. Sarnoff and G. Sartorelli and J. Schreiner and P. Schulte and H. Schulze Eißing and M. Schumann and L. Scotto Lavina and M. Selvi and F. Semeria and F. N. Semler and P. Shagin and S. Shi and H. Simgen and Z. Song and A. Stevens and C. Szyszka and A. Takeda and Y. Takeuchi and P. -L. Tan and D. Thers and G. Trinchero and C. D. Tunnell and K. Valerius and S. Vecchi and S. Vetter and G. Volta and B. von Krosigk and C. Weinheimer and M. Weiss and D. Wenz and C. Wittweg and V. H. S. Wu and Y. Xing and D. Xu and Z. Xu and M. Yamashita and J. Yang and L. Yang and J. Ye and M. Yoshida and L. Yuan and G. Zavattini and Y. Zhao and M. Zhong and T. Zhu},
journal= {arXiv preprint arXiv:2601.11296},
year = {2026}
}