Two analyses searching for squarks and gluinos which decay into final states with multiple
jets, an isolated electron or muon and a large missing transverse energy are presented. Both rely on data taken by the ATLAS detector in
pp collisions at a center-of-mass energy of 8 TeV at the LHC during 2012. The first analysis uses a subset of 5.8 fb-1 of this dataset, the other analysis uses the full statistics of 20.3 fb-1.

Both analysis share the same methods regarding the triggers and the background estimation techniques. The two
dominant backgrounds are ttbar and W+jets production. The ttbar
and the W+jets backgrounds are estimated in a semi-data-driven method. The minor QCD multi-jet background is estimated in an entirely
data-driven method. The final background estimates in the analyses are derived in a profile-log-likelihood fit.

None of the analyses sees an excess beyond Standard Model expectations.
The analysis of the partial dataset derives limits in a MSUGRA/CMSSM model with parameters A_0=0, tan(beta) = 10
and mu > 0 and excludes squarks and gluinos with masses below 1.2 TeV for equal squark and gluino masses.

The analysis of the full dataset derives limits in simplified models and in a MSUGRA/CMSSM model with parameters A_0=-2 m_0,
tan(beta) = 30 and mu > 0. Gluinos (squarks) with masses below 1.2 TeV (750 GeV) can be excluded for vanishing LSP masses in simplified models. Gluino masses below 1.2 TeV can be excluded for every m_0 value in the MSUGRA/CMSSM model.