Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 52: Suche nach dunkler Materie III

T 52.5: Talk

Wednesday, March 21, 2018, 17:40–17:55, Philo-HS5

The radioactive backgrounds of XENONnT — •Arianna rocchetti — XENON Collaboration

The XENON project aims at the direct detection of WIMP dark matter through the elastic scattering off xenon nuclei. It consists of a time projection chamber (TPC) filled with liquid xenon both as target and detection medium. The next step of the XENON program, the multi-ton scale XENONnT, is currently being developed by the collaboration. Its target mass of 6.0 t will improved the sensitivity to the WIMP nucleon interaction cross section to 1.6 * 10^48 cm^2 in a 20 t * y exposure. To estimatate the XENONnT sensitivity, the detailed knowledge about all possible background events is crucial. In this talk we present the detailed Monte Carlo simulations addressing the electronic and nuclear recoil backgrounds. Among the background sources are the decays of radioactive isotopes contained in the detector materials, which can lead to electronic and nuclear recoil signals. By means of Monte Carlo simulations we can reconstruct the spatial distribution of the interactions and fiducialize the target volume. We will present the results of these studies.