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A search for charginos and neutralinos at the Large Hadron Collider isreported using fully hadronic final states and missing transverse momentum.Pair-produced charginos or neutralinos are explored, each decaying into ahigh-$p_{\text{T}}$ Standard Model weak boson. Fully-hadronic final states arestudied to exploit the advantage of the large branching ratio, and theefficient background rejection by identifying the high-$p_{\text{T}}$ bosonsusing large-radius jets and jet substructure information. An integratedluminosity of 139 fb$^{-1}$ of proton-proton collision data collected by theATLAS detector at a center-of-mass energy of 13 TeV is used. No significantexcess is found beyond the Standard Model expectation. The 95% confidence levelexclusion limits are set on wino or higgsino production with varyingassumptions in the decay branching ratios and the type of the lightestsupersymmetric particle. A wino (higgsino) mass up to 1060 (900) GeV isexcluded when the lightest SUSY particle mass is below 400 (240) GeV and themass splitting is larger than 400 (450) GeV. The sensitivity to high-mass winoand higgsino is significantly extended compared with the previous LHC searchesusing the other final states.

physical review. d/physical review. d.

Search for charginos and neutralinos in final states with two boosted  hadronically decaying bosons and missing transverse momentum in $pp$  collisions at $\sqrt{s}=13$ TeV with the ATLAS detector