Search for electroweak production of charginos and neutralinos at $\sqrt{s}$ =13 TeV in final states containing hadronic decays of WW, WZ, or WH and missing transverse momentum

This Letter presents a search for direct production of charginos and neutralinos via electroweak
interactions. The results are based on data from proton-proton collisions at a center-of-mass energy
of 13 TeV collected with the CMS detector at the LHC, corresponding to an integrated luminosity
of 137 fb−1. The search considers final states with large missing transverse momentum and pairs of
hadronically decaying bosons WW, WZ, and WH, where H is the Higgs boson. These bosons are identified
using novel algorithms. No significant excess of events is observed relative to the expectations from
the standard model. Limits at the 95% confidence level are placed on the cross section for production
of mass-degenerate wino-like supersymmetric particles χ±
1 and χ0
2, and mass-degenerate higgsino-like
supersymmetric particles χ±
1 , χ0
2, and χ0
3. In the limit of a nearly-massless lightest supersymmetric
particle χ0
1, wino-like particles with masses up to 870 and 960 GeV are excluded in the cases of
χ0
2 → Zχ0
1 and χ0
2 → Hχ0
1, respectively, and higgsino-like particles are excluded between 300 and
650 GeV.