中国物理学会高能物理分会第十三届全国粒子物理学术会议（2021）

PandaX is a direct detection of DM experiment with a dual phase Xenon TPC. Constraintson the simplest EFT dark matter-nucleus spin-independent (SI) interaction with full exposuredata had been delivered recently. There are other DM models like EFT magnetic or electricdipole moment interactions and boosted scenario which produce quite different signal spectrafrom the simplest EFT SI model. They can have significant contribution on the high energy nu-clear recoils. In this work we extend the region of interest to 25keVee to optimize the sensitivityto these new models. The detector response to both nuclear and electron recoil in this regionare carefully studied with calibration data. All the background are re-evaluated in the extendedsignal region. No significant excess is found compared to background-only model in this newregion, and we conclude stronger constraints on the EFT models. We also give constrains oncross section of the cosmic ray boosted DM.