Han, CC (reprint author), Henan Norman Univ, Dept Phys, Xinxiang 453007, Peoples R China.
; Liu, Ning] Henan Norman Univ, Dept Phys, Xinxiang 453007, Peoples R China
; [Han, Chengcheng
; Yang, Jin Min] Acad Sinica, State Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
; [Kobakhidze, Archil
; Liu, Ning
; Saavedra, Aldo
; Wu, Lei] Univ Sydney, Sch Phys, ARC Ctr Excellence Particle Phys Terascale, Sydney, NSW 2006, Australia
We investigate a strategy to search for light, nearly degenerate higgsinos within the natural MSSM at the LHC. We demonstrate that the higgsino mass range mu in 100 - 160 GeV, which is preferred by the naturalness, can be probed at 3 sigma significance through the monojet search at 14TeV HL-LHC with 3000 fb(-1) luminosity. The proposed method can also probe certain region in the parameter space for the lightest neutralino with a high higgsino purity, that cannot be reached by planned direct detection experiments at XENON-1T(2017).