Abstract
The PandaX-4T is a dark matter direct search experiment with a dual-phase xenon detector. It is located at Jinping underground laboratory in Sichuan, China. In 2.8-ton fiducial mass and energy region of interest (range from 1 to 10 keV), the total electron recoil and nuclear recoil backgrounds are estimated to be (4.9±0.5) × 10−2 mDRU and (2.8±0.5) × 10−4 mDRU. With an exposure of 5.6 ton-years, the expected sensitivity of PandaX-4T could reach a spin-independent dark matter-nucleon cross section of 6 × 10−48 cm2 at a dark matter mass of 40 GeV/c2. An overview of detector design, background control and current status will be presented in this paper.
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