Search for R-parity-violating supersymmetry in events with four or more leptons in $$ \sqrt{s}=7\;\mathrm{TeV} $$pp collisions with the ATLAS detector

Abstract

A search for new phenomena in final states with four or more leptons (electrons or muons) is presented. The analysis is based on 4.7 fb−1 of $$ \sqrt{s}=7;\mathrm{TeV} $$ proton-proton collisions delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in two signal regions: one that requires moderate values of missing transverse momentum and another that requires large effective mass. The results are interpreted in a simplified model of R-parity-violating supersymmetry in which a 95% CL exclusion region is set for charged wino masses up to 540 GeV. In an R-parity-violating MSUGRA/CMSSM model, values of m1/2 up to 820 GeV are excluded for 10 < tan β < 40.