Closing up a light stop window in natural SUSY at LHC

• DOI: 10.1016/j.physletb.2016.02.003
• Publication Date: 2016-02-04T15:42:00Z
• Authors: Archil Kobakhidze; Ning Liu; Lei Wu; Jin Min Yang; Mengchao Zhang
• Keywords: Nuclear and High Energy Physics; High Energy Physics - Phenomenology; High Energy Physics - Experiment (hep-ex); High Energy Physics - Phenomenology (hep-ph); Physics; QC1-999; 0103 physical sciences; FOS: Physical sciences; 01 natural sciences; High Energy Physics - Experiment

Top squark (stop) plays a key role in the radiative stability of Higgs boson mass supersymmetry (SUSY). In this work, we use LHC Run-1 data to determine lower limit right-handed stop natural SUSY scenario, where higgsinos χ˜1,20 and χ˜1± are light nearly degenerate. We find that has been excluded up 430 GeV for mχ˜10≲250 540 mχ˜10≃100 by searches 2b+ETmiss 1ℓ+jets+ETmiss, respectively. small strip parameter space with mχ˜10≳190 GeV, can still be as 210 compatible measurement monojet bound. The 14 TeV luminosity 20 fb−1 further cover such window push bound 710 GeV. also explore potential golden ratio, Dγγ=σ(pp→h→γγ)/σ(pp→h→ZZ⁎→4ℓ±), complementary probe compressed stop. If ratio measured at percent level high (HL-LHC) or future e+e− colliders, most currently allowed region.