Speaker
Description
The multi-tonne XENONnT detector is the next step in the evolution of the XENON project. The experiment, aimed at direct detection of WIMPs, utilizes 5.9t of instrumented liquid xenon. Dedicated screening results of all detector materials were used to project the expected overall background in the detector, while improvements in suppressing intrinsic backgrounds from electronic recoil sources will allow XENONnT to reduce this background to an expected level 1/6th that of its predecessor within a 4t fiducial volume. The addition of a neutron veto around the XENONnT cryostat allows for significant suppression of the overall neutron background as well. XENONnT is aimed at achieving a 20 t.y exposure over its lifetime. In this talk I will present the sensitivity to spin-dependent and -independent WIMP nucleon interactions. In the case of spin-independent interactions, the sensitivity will reach a cross-section of $1.4\times10^{-48}\,\mathrm{cm}^2$ for a 50\,GeV/c$^2$ mass WIMP at 90% confidence level, more than one order of magnitude beyond the current best limits.
