Journal Article

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

Chen, YunHua, Gu, LinHui, Cui, XiangYi, Yan, BinBin, Han, Ke, Wang, Meng, Zhou, Ning, Huang, XingTao, Ning, JinHua, Wang, QiuHong, Wu, ShiYong, Fu, ChangBo, Wang, HongWei, Wang, SiGuang, Liu, HuaXuan, Abdukerim, Abdusalam, Ren, XiangXiang, Ji, Peng, Yu, ChunXu, Chen, Xun, Zhang, Dan, Lin, Heng, Li, ShaoLi, Giuliani, Franco, Dong, BinBin, Zhou, XiaoPeng, Zheng, QiBin, Ji, XiangDong, Wang, Zhou, Huang, Zhou, Mao, YaJun, Xiao, MengJiao, Zhang, HongGuang, Tan, AnDi, Shi, Fang, Xie, PengWei, Yuan, JuMin, Li, Yao, Fang, DeQing, He, ChangDa, Wang, Cheng, Liu, JiangLai, Yang, Yong, Zhang, Tao, Ni, KaiXiang, Yue, JianFeng, Ju, YongLin, Ma, YuGang, Xia, JingKai, Zhao, Li, Giboni, Karl, Yang, JiJun, Guo, ZhiFan, Wang, AnQing, Wang, XiuLi, Chen, Wei, Wang, XuMing, Guo, XuYuan, Wu, MengMeng, He, ShengMing, Huang, Di, Zhou, JiFang

2019

Overview

The PandaX-4T experiment, a 4-ton scale dark matter direct detection experiment, is being planned at the China Jinping Un- derground 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 PandaX-4T could reach a minimum spin-independent dark matter-nucleon cross section of 6 × 10 −48 cm 2 at a dark matter mass of 40 GeV/ c 2 .

• Publisher: Science China Press,Springer,Springer Nature B.V
• Subject: Astronomy / Classical and Continuum Physics / Cosmic rays / Cosmology / Dark matter / Experiments / Laboratories / Observations and Techniques / Particle physics / Physics / Physics and Astronomy / Recoil / Sensitivity / Sensors