Constraints on Spin-Independent Nucleus Scattering with sub-GeV to GeV Weakly Interacting Massive Particle(WIMP) Dark Matter for CDEX and TEXONO Experiments under the Earth Attenuation Effect
Chih-Hsiang Yeh1,2*, H. B. Li1, H. T. Wong1
1Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
2Department of Physics, National Central University, Taoyuan City 32001, Taiwan
* Presenter:Chih-Hsiang Yeh,
In our researches, we investigate limits on spin-independent WIMP-nucleus scattering cross section with both earth and shielding effects. Beyond the extreme cross sections for different masses, the dark matter could be totally blocked from reaching detectors. Our results considering (1)nuclear recoil, incorporating (2)Midgal effect and (3)Bremsstrahlung are presented with CDEX(underground experiment)and latest TEXONO(Surface experiment) data. In particular, the very low mass region, which is between 0.06GeV and 0.16GeV dark matter masses, can be excluded by TEXONO data with the higher cross sections that underground experiments cannot probe.

Keywords: Weakly Interacting Massive Particle(WIMP), Direct-Detection Experiment, Taiwan EXperiment On NeutrinO(TEXONO), The China Dark Matter Experiment (CDEX)