Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 22: Search for Dark Matter 1
T 22.1: Gruppenbericht
Montag, 21. März 2022, 16:15–16:35, T-H35
Current status of the XENONnT Dark Matter Search Experiment — •Luisa Hötzsch — Max-Planck-Institut für Kernphysik, Heidelberg — on behalf of the XENON Collaboration
The XENON experiments are among the most sensitive dark matter (DM) detectors, utilizing the concept of dual-phase xenon time projection chambers (TPCs) for the direct detection of weakly interacting massive particles (WIMPs). The XENON1T detector, which utilized a total of 3.2 tonnes of xenon target, was able to set the most stringent limits on the WIMP-nucleon spin-independent cross section for WIMP masses above 6 GeV/c2, with a minimum of 4.1×10−47 cm2 at 30 GeV/c2.
The latest iteration in the XENON experiment series is the XENONnT detector, which is currently running at the INFN Gran Sasso National Laboratory in Italy. With a total of 8.4 tonnes of xenon, it is projected to improve the sensitivity to WIMP dark matter by another order of magnitude. In addition, due to its further background reduction by a factor of approximately 6, XENONnT is expected to be able to clarify the nature of an electronic recoil event excess observed in XENON1T.
In this talk, I will give an overview of the XENONnT detector and its subsystems, and present the current status of the experiment.