Searching for SUSY at the upgraded LHC

We investigate the pair production of $\tilde{\chi}_1^{\pm} \tilde{\chi}_2^0$ followed by a subsequent decay into the W and the Higgs SM bosons using events with 3 leptons and missing transverse momentum ($E_{\text{T}}^{\text{miss}}$) coming from proton-proton collision data produced by the LHC at 14 TeV center-of-mass energy and collected by the ATLAS detector. A cut-and-count analysis is presented with the assumption of 3000$\text{ fb}^{-1}$ of data. The results are interpreted as discovery and exclusion reaches.