Search for supersymmetry in events with large missing transverse momentum, jets, and at least one tau lepton in 21 fb−1 of 8 TeV proton-proton collision data with the ATLAS detector.

Searches for Supersymmetry (SUSY) with tau leptons are of interest due to the enhanced branching ratio into taus compared to light leptons (e/μ) in many SUSY models. In the following a search for SUSY with the ATLAS detector at the Large Hadron Collider (LHC) in events with at least one hadronically decaying tau lepton, large missing transverse momentum, jets and no light leptons is presented. The results are based on 20.7/ fb of proton-proton collision data at a center-of-mass energy of 8 TeV collected during 2012. No excess above the Standard Model predictions has been observed. A limit on the SUSY breaking scale Λ of 51 TeV, independent of tan β , is determined for a minimal gauge-mediated supersymmetry breaking (GMSB) model. In a natural Gauge Mediation (nGM) model limits are set on on the gluino mass of 1140 GeV, insependent of the stau mass, provided the stau is the NLSP. Limits are also obtained in the m0 − m1/2 of a mSUGRA/CMSSM model