arXiv:2111.11243·v2·High Energy Physics — Experiment
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 · J. P. Chang · J. H. Chen · Y. H. Chen · J. P. Cheng
Abstract
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 -N cross section exclusion regions are derived based on the studies with CDEX experiment data.
Comments: 8 pages, 8 figures, 2 tables. Version updated to match PRD version