1. observation of excess electronic recoil events in xenon1t

Shingo Kazama

Nagoya University, Japan

20 August 2020 Thu 3 pm

                                      IBS Center for Theoretical Physics of Complex Systems (PCS), Administrative Office (B349), Theory Wing, 3rd floor

                                      Expo-ro 55, Yuseong-gu, Daejeon, South Korea, 34126 Tel: +82-42-878-8633                     

XENON1T is an experiment designed to measure nuclear recoils induced by dark-matter particle interactions in the Milky Way. The detector consist of a dual-phase time projection chamber (TPC) with 2 tons of liquid xenon (LXe) in the target. Due to its large mass and ultra-low background, the physics case of XENON1T is expanded to further rare event searches. In this talk, results from searches for new physics with low-energy electronic recoil data will be presented. The data enables competitive searches for solar axions, an enhanced neutrino magnetic moment using solar neutrinos, and bosonic dark matter. An excess over well-known backgrounds is observed below 7 keV, rising towards lower energies and prominent between 2?3 keV. In this talk, I will discuss the cross-checks performed to the data, additional possible backgrounds and the results for the different searches for new physics.