Search for electroweak production of charginos and sleptons decaying into final states with two leptons and missing transverse momentum in $\sqrt {s}$= 13 TeV $pp$ collisions using the ATLAS detector

A search for the electroweak production of charginos and sleptons decaying into final states with two electrons or muons is presented. The analysis is based on 139 fb$^{−1}$ of proton-proton collision data recorded by the ATLAS experiment at the Large Hadron Collider (LHC) at $\sqrt{s}$ = 13TeV. Three scenarios are considered: the production of chargino pairs with decays via either $W$ bosons or sleptons and the direct production of slepton pairs. No significant deviations from the Standard Model expectations are observed and limits at 95% confidence level (CL) are set on the masses of relevant supersymmetric particles in each of these scenarios.