Dark matter direct search sensitivity of the PandaX-4T experiment

Understand

The PandaX-4T experiment, a four-ton scale dark matter direct detection experiment, is being planned at the China Jinping Underground Laboratory.

• In this paper we present a simulation study of the expected background in this experiment.
• In a 2.8-ton fiducial mass and the signal region between 1 to 10 keV electron equivalent energy, the total electron recoil background is found to be 4.9x10^{-5} /(kg day keV).
• The nuclear recoil background in the same region is 2.8x10^{-7}/(kg day keV).