First Search for Light Dark Matter in the Neutrino Fog with XENONnT

• DOI: 10.48550/arxiv.2409.17868
• Publication Date: 2024-09-26
• Authors: E. Aprile; J. Aalbers; K. Abe; S. Ahmed Maouloud; L. Althueser; B. Andrieu; E. Angelino; D. Antón Martin; F. Arneodo; L Baudis; M Bazyk; L Bellagamba; R. Biondi; A. Bismark; K Boese; A. M. Brown; G. Bruno; R. Budnik; Ce Cai; C. Capelli; J. M. R. Cardoso; A. P. Cimental Ch...; A. P. Colijn; Jan Conrad; J. J. Cuenca-García; V d'Andrea; L.C Daniel Garcia; M.P Decowski; A. Deisting; C Di Donato; P. Di Gangi; S Diglio; K. Eitel; S. El Morabit; A. Elykov; A.D Ferella; C. Ferrari; H. Fischer; T Flehmke; M Flierman; W. Fulgione; C Fuselli; P. Gaemers; R. Gaïor; M. Galloway; F. Gao; Sumit Ghosh; R Giacomobono; R. Glade-Beucke; L. Grandi; J. Grigat; H Guan; M. Guida; P Gyorgy; R Hammann; A. Higuera; C. Hils; L. Hoetzsch; N.F Hood; M. Iacovacci; Y. Itow; J. Jakob; F Joerg; Y Kaminaga; M. Kara; P. Kavrigin; S. Kazama; M. Kobayashi; D Koke; A. Kopec; H. Landsman; R. F. Lang; L. J. Levinson; I. Li; S. Li; S. Liang; Ying-Tsong Lin; S Lindemann; M. Lindner; K. Liu; M. X. Liu; J. Loizeau; F. Lombardi; Jianyu Long; J. A. M. Lopes; T.C. Luce; Y. Ma; C. Macolino; J. Mahlstedt; A. Mancuso; L Manenti; F Marignetti; T. Marrodán Undag...; K. Martens; J. Masbou; E. Masson; S. Mastroianni; A Melchiorre; J. Merz; M. Messina; A Michael; K. Miuchi; A Molinario; S. Moriyama; K. Morå; Y Mosbacher; M. Murra; J. Müller; Kaixiang Ni; U Oberlack; B. Paetsch; Y. Pan; Q Pellegrini; R. Peres; C. Peters; J. Pienaar; M. Pierre; G. Plante; T.R Pollmann; L Principe; Jing-Zhao Qi; J. Qin; D. Ramírez García; M Rajado; R Singh; L. Escudero Sanchez; J.M.F. dos Santos; I. Sarnoff; G. Sartorelli; J Schreiner; Peter Schulte; H. Schulze Eißing; M Schumann; L. Scotto Lavina; M Selvi; F. Semeria; P. Shagin; S. Shi; Jian Shi; M. Silva; H. Simgen; C. Szyszka; A. Takeda; P.-L. Tan; D. Thers; F Toschi; G Trinchero; C.D Tunnell; F. Tönnies; K Valerius; S. Vecchi; S Vetter; F.I. Villazon Solar; G. Volta; C Weinheimer; Matthew J. Weiss; D. Wenz; C. Wittweg; V.H.S Wu; Y. Xing; D. Xu; Z. Xu; M Yamashita; L. T. Yang; Ye J; L. Yuan; G. Zavattini; M. Zhong
• Keywords: WIMP; Recoil

We search for dark matter (DM) with a mass [3,12] $\mathrm{GeV} / c^2$ using an exposure of 3.51 $\mathrm{t} \times \mathrm{y}$ the XENONnT experiment. consider spin-independent, spin-dependent, momentum-dependent, mirror DM, and self-interacting DM light mediator coupling to Standard Model particles. Using lowered energy threshold compared previous WIMP search, blind analysis [0.5, 5.0] $\mathrm{keV}$ nuclear recoil events reveals no significant signal excess over background. excludes spin-independent DM-nucleon cross sections $>2.5 10^{-45} \mathrm{~cm}^2$ at $90 \%$ confidence level 6 DM. The solar ${ }^8 \mathrm{B}$ neutrino coherent elastic neutrino-nucleus scattering background accounts approximately half in region. In considered range, sensitivity approaches 'neutrino fog', limitation where neutrinos produce that is indistinguishable from DM-xenon nucleus scattering.