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Studies of the Earth shielding effect to direct dark matter searches at the China Jinping Underground Laboratory

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arxiv 2111.11243 v2 pith:I4Q7FDPW submitted 2021-11-22 hep-ex hep-phphysics.ins-det

Studies of the Earth shielding effect to direct dark matter searches at the China Jinping Underground Laboratory

Z. Z. Liu , L. T. Yang , Q. Yue , C. H. Yeh , K. J. Kang , Y. J. Li , M. Agartioglu , H. P. An
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J. P. Chang J. H. Chen Y. H. Chen J. P. Cheng W. H. Dai Z. Deng C. H. Fang X. P. Geng H. Gong X. Y. Guo Q. J. Guo L. He S. M. He J. W. Hu H. X. Huang T. C. Huang H. T. Jia X. Jiang H. B. Li J. M. Li J. Li R. M. J. Li X. Q. Li Y. L. Li B. Liao F. K. Lin S. T. Lin S. K. Liu Y. Liu Y. D. Liu Y. Y. Liu H. Ma Y. C. Mao Q. Y. Nie J. H. Ning H. Pan N. C. Qi J. Ren X. C. Ruan K. Saraswat V. Sharma Z. She M. K. Singh T. X. Sun C. J. Tang W. Y. Tang Y. Tian G. F. Wang L. Wang Q. Wang Y. Wang Y. X. Wang Z. Wang H. T. Wong S. Y. Wu Y. C. Wu H. Y. Xing Y. Xu T. Xue Y. L. Yan N. Yi C. X. Yu H. J. Yu J. F. Yue M. Zeng Z. Zeng B. T. Zhang F. S. Zhang Z. H. Zhang Z. Y. Zhang K. K. Zhao M. G. Zhao J. F. Zhou Z. Y. Zhou J. J. Zhu
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classification hep-ex hep-phphysics.ins-det
keywords darkearthmattershieldingundergroundcjpleffectchina
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Dark matter direct detection experiments mostly operate at deep underground laboratories. It is necessary to consider shielding effect of the Earth, especially for dark matter particles interacting with a large cross section. We analyzed and simulated the Earth shielding effect for dark matter at the China Jinping Underground Laboratory (CJPL) with a simulation package, CJPL Earth Shielding Simulation code (CJPL\_ESS), which is applicable to other underground locations. The further constraints on the $\chi$-N cross section exclusion regions are derived based on the studies with CDEX experiment data.

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