  The ATLAS experiment has performed extensive searches for the electroweak
production of charginos, neutralinos and staus. This article summarizes and
extends the search for electroweak supersymmetry with new analyses targeting
scenarios not covered by previously published searches. New searches use
vector-boson fusion production, initial-state radiation jets, and low-momentum
lepton final states, as well as multivariate analysis techniques to improve the
sensitivity to scenarios with small mass splittings and low-production
cross-sections. Results are based on 20 fb$^{-1}$ of proton-proton collision
data at $\sqrt{s}$=8 TeV recorded with the ATLAS experiment at the Large Hadron
Collider. No significant excess beyond Standard Model expectations is observed.
The new and existing searches are combined and interpreted in terms of 95%
confidence-level exclusion limits in simplified models, where a single
production process and decay mode is assumed, as well as within
phenomenological supersymmetric models.
