Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in 13.0 fb-1 of pp collisions at sqrt(s)=8 TeV with the ATLAS detector

A search for the direct production of charginos and neutralinos in final states with three leptons (electrons or muons) and missing transverse momentum is presented. The analysis uses 13.0 fb−1 of proton-proton collision data delivered by the LHC at √s = 8 TeV and recorded by the ATLAS detector. No excess above the Standard Model expectation is observed in three signal regions that are either enriched or depleted in Z-boson decays. Limits are placed at the 95% confidence level on the masses of the charginos and neutralinos in simplified models and on the parameters of the phenomenological Minimal Supersymmetric Standard Model. In simplified models, chargino masses are excluded up to 580 GeV in the presence of light sleptons and in the range 150–300 GeV in case of heavy sleptons for a massless lightest neutralino, significantly extending previous results.