Göttingen 2025 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 41: Search for Dark Matter II
T 41.4: Vortrag
Dienstag, 1. April 2025, 17:00–17:15, VG 4.102
Modeling the nuclear recoil response in XENONnT — •Johanna Jakob for the XENON collaboration — Institut für Kernphysik, Universität Münster
XENONnT, the latest stage of the XENON Dark Matter Project, is currently running with the science goals of detecting WIMP-nucleus scattering and searching for other rare events. The detector is a dual-phase time projection chamber filled with 5.9 tonnes of liquid xenon in the active volume. In the detector, neutral particles are most likely to interact with the nucleus, resulting in nuclear recoil (NR). Potential WIMP interactions as well as the rare Standard Model process of coherent elastic neutrino-nucleus scattering (CEνNS) both produce NR interactions. Consequently, characterizing the detector response to NR is essential for such investigations. Neutrons serve as an excellent calibration source for studying this response, as their NR interactions are indistinguishable from those of WIMPs or CEνNS. This talk discusses how neutrons tagged with coincident 4.4 MeV gammas from an 241Am9Be source are used to constrain the light and charge yield parameters of the NEST model (Noble Element Simulation Technique). This work is supported by BMBF ErUM-Pro 05A23PM1.
Keywords: XENON; XENONnT; Nuclear recoil