Search for supersymmetry in events with three leptons and missing transverse momentum in √s = 7 TeV pp collisions with the ATLAS detector

This document presents a search for the production of supersymmetric particles decaying into final states with three electrons or muons and missing transverse momentum. The analysis uses 2.06 fb−1 of √s = 7 TeV proton-proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in two signal regions that are either depleted or enriched in Z-boson decays. Upper limits at 95% confidence level are set in R-parity conserved phenomenological minimal supersymmetric and simplified models for direct chargino and neutralino production. For the simplified models, degenerate lightest chargino and next-to-lightest neutralino masses up to 300 GeV are excluded for mass differences to the lightest neutralino up to 250 GeV.