Search for direct production of electroweak gauginos in events with two same-sign or three leptons in 13 TeV pp collision data with the ATLAS detector

A search for supersymmetry (SUSY) through the production of electroweak gauginos in final states with two leptons with the same-sign electric charge or at least three leptons is presented. The analysed dataset corresponds to 139 fb-1 of proton-proton collision data collected at centre-of-mass energy of 13 TeV with the ATLAS detector at LHC. No significant excess over the Standard Model (SM) prediction is observed. Results are interpreted in terms of different R-parity conserving and R-parity violating models, and exclusion limits at 95% CL are set on the masses of the superpartners involved in the benchmark scenarios. Model-independent upper limits on the BSM events that may contribute to the signal regions defined in the analysis are also estimated.