Search for Supersymmetry in events with large missing transverse momentum, at least one b-jet candidate and at least one electron or muon in 7 TeV pp collisions with the ATLAS detector

Supersymmetry (SUSY) is a well motivated theory for physics beyond the standard model, which solves the hierarchy problem and provides a dark matter candidate if R-parity is conserved (lightest SUSY particle, LSP). Leptons and multiple jets can be produced in cascade decays of SUSY particles, at the end of which the LSP miss leads to high missing transverse momentum. The production of third generation squarks is favoured in many scenarios, which serves as motivation for the b-jet search channel. The data sample used consists of an integrated luminosity of 35 pb−1 recorded in 2010 by the ATLAS experiment at the LHC.