First indication of solar 8B neutrinos via coherent elastic neutrino-nucleus scattering with XENONnT

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

doi:10.1103/PhysRevLett.133.191002

We present the first measurement of nuclear recoils from solar 8B neutrinos via coherent elastic neutrino-nucleus scattering with the XENONnT dark matter experiment. The central detector of XENONnT is a low-background, two-phase time projection chamber with a 5.9 t sensitive liquid xenon target. A blind analysis with an exposure of 3.51 t×yr resulted in 37 observed events above 0.5 keV, with (26.4+1.4−1.3) events expected from backgrounds. The background-only hypothesis is rejected with a statistical significance of 2.73⁢𝜎. The measured 8B solar neutrino flux of (4.7+3.6−2.3)×10⁶ cm⁻² s⁻¹ is consistent with results from the Sudbury Neutrino Observatory. The measured neutrino flux-weighted CE⁢𝜈⁢NS cross section on Xe of (1.1+0.8−0.5)×10⁻³⁹ cm² is consistent with the Standard Model prediction. This is the first direct measurement of nuclear recoils from solar neutrinos with a dark matter detector.

First indication of solar 8B neutrinos via coherent elastic neutrino-nucleus scattering with XENONnT / Aprile, E., Aalbers, J., Abe, K., Ahmed Maouloud, S., Althueser, L., Andrieu, B., Angelino, E., Antón Martin, D., Arneodo, F., Baudis, L., Bazyk, M., Bellagamba, L., Biondi, R., Bismark, A., Boese, K., Brown, A., Bruno, G., Budnik, R., Cai, C., Capelli, C., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 1079-7114. - 133:19(2024), pp. 1-11. [10.1103/PhysRevLett.133.191002]