Ar-37 Calibration of XENONnT for the First Results with Electronic Recoils

After briefly introducing the XENONnT experiment, the poster presents the results of the calibration of the low energy electronic recoil response with 37Ar (E ≃ 2.8224 keV). Moreover, the first science result with electronic recoil data is reported which set competitive limits on several new physics models, including solar axions, neutrino magnetic moment, ALPs, and dark photons. No excess is being observed ruling out the new physics interpretation of the 1T anomaly.