Status and first results from XENONnT

Abstract

XENON is a project for direct dark matter search located in the INFN underground laboratory LNGS. The previous generation of XENON detector, XENON1T, achieved an exposure of 1 ton$\times$year, setting the most stringent limits on the spin-independent scattering cross section of Weakly Interacting Massive Particles (WIMPs) on nucleons for nearly the complete range of WIMP masses above $120$ MeV. The multi-tonne XENONnT detector is the next step in the evolution of the XENON project. The experiment, aimed at directly detecting WIMPs, utilizes $5.9~t$ of instrumented liquid Xenon (LXe). The expected overall background in the detector is based on dedicated screening results of all detector materials. In contrast, improvements in mitigating intrinsic backgrounds from electronic recoil sources allow XENONnT to reduce this background compared to its predecessor. Adding a neutron veto around the XENONnT cryostat also allows for a significant rejection of the neutron background. XENONnT aims at achieving a 20 ton$\times$year exposure over its lifetime. The talk summarised the main results of XENON1T and the status of XENONnT.