First dark matter search with nuclear recoils from the XENONnT experiment

• Titel: First dark matter search with nuclear recoils from the XENONnT experiment
• Mitwirkende: Aprile, Elena [VerfasserIn]
• Mitwirkende: Lindner, Manfred [VerfasserIn]
• Mitwirkende: Marrodán Undagoitia, Teresa [VerfasserIn]
• Mitwirkende: Terliuk, Andrii [VerfasserIn]
• Mitwirkende: Wolf, Thomas [VerfasserIn]
• Verf.angabe: XENON Collaboration*
• E-Jahr: 2023
• Jahr: 28 July 2023
• Umfang: 9 S.
• Illustrationen: Illustrationen
• Fussnoten: Veröffentlicht: 28. Juli 2023 ; *XENON Collaboration: E. Aprile, M. Lindner, T. Marrodán Undagoitia, A. Terliuk, T. Wolf und 160 weitere Personen ; Gesehen am 12.12.2023
• Titel Quelle: Enthalten in: Physical review letters
• Ort Quelle: College Park, Md. : APS, 1958
• Jahr Quelle: 2023
• Band/Heft Quelle: 131(2023), 4, Artikel-ID 041003, Seite 1-9
• ISSN Quelle: 1079-7114
• DOI: doi:10.1103/PhysRevLett.131.041003
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1873170793

Abstract

We report on the first search for nuclear recoils from dark matter in the form of weakly interacting massive particles (WIMPs) with the XENONnT experiment, which is based on a two-phase time projection chamber with a sensitive liquid xenon mass of 5.9 ton. During the (1.09±0.03) ton yr exposure used for this search, the intrinsic 85Kr and 222Rn concentrations in the liquid target are reduced to unprecedentedly low levels, giving an electronic recoil background rate of (15.8±1.3) events/ton yr keV in the region of interest. A blind analysis of nuclear recoil events with energies between 3.3 and 60.5 keV finds no significant excess. This leads to a minimum upper limit on the spin-independent WIMP-nucleon cross section of 2.58×10−47 cm2 for a WIMP mass of 28 GeV/c2 at 90% confidence level. Limits for spin-dependent interactions are also provided. Both the limit and the sensitivity for the full range of WIMP masses analyzed here improve on previous results obtained with the XENON1T experiment for the same exposure.