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arXiv · 2608.15149

Search for Magnetic and Spin-Independent Inelastic Dark Matter with XENONnT

E. Aprile·J. Aalbers·K. Abe·M. Abu Rmilah·M. Adrover·S. Ahmed Maouloud·L. Althueser·B. Andrieu·E. Angelino·D. Antón Martin·S. R. Armbruster·F. Arneodo·L. Baudis·M. Bazyk·V. Beligotti·L. Bellagamba·R. Biondi·A. Bismark·K. Boese·R. M. Braun·G. Bruni·R. Budnik·C. Cai·C. Capelli·J. M. R. Cardoso·A. P. Cimental Chávez·A. P. Colijn·J. 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·R. Elleboro·A. Elykov·A. D. Ferella·C. Ferrari·H. Fischer·T. Flehmke·M. Flierman·R. Frankel·D. Fuchs·W. Fulgione·C. Fuselli·F. Gao·R. Giacomobono·R. Glade-Beucke·L. Grandi·J. Grigat·M. Guida·P. Gyorgy·R. Hammann·C. Hils·L. Hoetzsch·N. F. Hood·A. Hurhina·M. Iacovacci·Y. Itow·J. Jakob·F. Joerg·Y. Kaminaga·S. Kazama·P. Kharbanda·M. Kobayashi·D. Koke·K. Kooshkjalali·A. Kopec·E Kozlova·H. Landsman·R. F. Lang·L. Levinson·A. Li·H. Li·I. Li·S. Li·Z. Liang·Y. -T. Lin·S. Lindemann·M. Lindner·K. Liu·M. Liu·F. Lombardi·J. A. M. Lopes·G. M. Lucchetti·T. Luce·Y. Ma·C. Macolino·G. C. Madduri·J. Mahlstedt·F. Marignetti·T. Marrodán Undagoitia·K. Martens·J. Masbou·S. Mastroianni·V. Mazza
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Abstract

We present a search for Magnetic and Spin-Independent inelastic Dark Matter using 2.1 tonne-years of data from the XENONnT experiment. We consider both single- and double-site event topologies, targeting the unique signature of an initial nuclear recoil followed by a delayed de-excitation photon. To suppress backgrounds, we introduce novel directional and kinematic selections based on the inferred speed and direction of the excited dark matter particle between the scatter and decay sites. We find that the collected data are consistent with background expectations, and report 90% C.L. upper limits for both models across the GeV/c2-TeV/c2 mass range.

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E. Aprile, J. Aalbers, K. Abe, M. Abu Rmilah, M. Adrover, S. Ahmed Maouloud, L. Althueser, B. Andrieu, E. Angelino, D. Antón Martin, S. R. Armbruster, F. Arneodo, L. Baudis, M. Bazyk, V. Beligotti, L. Bellagamba, R. Biondi, A. Bismark, K. Boese, R. M. Braun, G. Bruni, R. Budnik, C. Cai, C. Capelli, J. M. R. Cardoso, A. P. Cimental Chávez, A. P. Colijn, J. 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, R. Elleboro, A. Elykov, A. D. Ferella, C. Ferrari, H. Fischer, T. Flehmke, M. Flierman, R. Frankel, D. Fuchs, W. Fulgione, C. Fuselli, F. Gao, R. Giacomobono, R. Glade-Beucke, L. Grandi, J. Grigat, M. Guida, P. Gyorgy, R. Hammann, C. Hils, L. Hoetzsch, N. F. Hood, A. Hurhina, M. Iacovacci, Y. Itow, J. Jakob, F. Joerg, Y. Kaminaga, S. Kazama, P. Kharbanda, M. Kobayashi, D. Koke, K. Kooshkjalali, A. Kopec, E Kozlova, H. Landsman, R. F. Lang, L. Levinson, A. Li, H. Li, I. Li, S. Li, Z. Liang, Y. -T. Lin, S. Lindemann, M. Lindner, K. Liu, M. Liu, F. Lombardi, J. A. M. Lopes, G. M. Lucchetti, T. Luce, Y. Ma, C. Macolino, G. C. Madduri, J. Mahlstedt, F. Marignetti, T. Marrodán Undagoitia, K. Martens, J. Masbou, S. Mastroianni, V. Mazza. 2026-08-15. Search for Magnetic and Spin-Independent Inelastic Dark Matter with XENONnT. https://arxiv.org/abs/2608.15149

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