摘要
The Panda X-4T experiment, a 4-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 1-10 keV electron equivalent energy, the total electron recoil background is found to be 4.9 × 10~(-5) kg~(-1) d~(-1) keV~(-1). The nuclear recoil background in the same region is 2.8 × 10~(-7) kg~(-1) d~(-1) keV~(-1). With an exposure of 5.6 ton-years, the sensitivity of Panda X-4 T could reach a minimum spin-independent dark matter-nucleon cross section of 6 × 10~(-48) cm~2 at a dark matter mass of 40 Ge V/c~2.
The Panda X-4T experiment, a 4-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 1-10 keV electron equivalent energy, the total electron recoil background is found to be 4.9 × 10~(-5) kg~(-1) d~(-1) keV~(-1). The nuclear recoil background in the same region is 2.8 × 10~(-7) kg~(-1) d~(-1) keV~(-1). With an exposure of 5.6 ton-years, the sensitivity of Panda X-4 T could reach a minimum spin-independent dark matter-nucleon cross section of 6 × 10~(-48) cm~2 at a dark matter mass of 40 Ge V/c~2.
引文
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