Search for New Physics in Electronic Recoil Data from XENONnT

The XENON collaboration has pioneered the search for particle dark matter, such as weakly interacting massive particles (WIMPs). The XENON experiments are dark matter direct detection experiments consisting of dual phase xenon time projection chambers located underground at the Gran Sasso Laboratory in Italy. The XENON1T experiment operated between 2016 and 2018 and used a one-tonne target for the most sensitive direct detection search for WIMPs with masses above 3 GeV. Due to its low radioactive background levels, the experiment also searched for recoiling electrons. However, in XENON1T data, an electronic recoil (ER) excess was observed at 2.3 keV, which can be interpreted as a sign of new physics. We recently upgraded XENON1T into the XENONnT detector with a three-times larger active volume. With improvements such as new purification systems, XENONnT achieved a five-times lower background in (1,30) keV ER region. A blinded analysis was performed on the low energy ER data of the first science run of XENONnT from July 6, 2021 to November 10, 2021 to search for the previous excess. We excluded the XENON1T excess by 4σ and provide limits on new physics such as solar axions and neutrino magnetic moments, which will be summarized in this talk.