Limits on Light Weakly Interacting Massive Particles
H. Jiang, L.P. Jia, Q. Yue et al.
Limits on Light Weakly Interacting Massive Particles from the First 102.8 kg×day Data of the CDEX-10 Experiment
We report the first results of a light weakly interacting massive particles (WIMPs) search from the CDEX-10 experiment with a 10 kg germanium detector array immersed in liquid nitrogen at the China Jinping Underground Laboratory with a physics data size of 102.8 kg day. At an analysis threshold of 160 eVee, improved limits of 8 × 10−42 and 3 × 10−36 cm2 at a 90% confidence level on spin-independent and spin-dependent WIMP-nucleon cross sections, respectively, at a WIMP mass (mχ) of 5 GeV/c2 are achieved. The lower reach of mχ is extended to 2 GeV/c2.