Search for squarks and gluinos using final states with jets and missing transverse momentum with the ATLAS detector in √s = 7 TeV proton-proton collisions

A search for squarks and gluinos in final states containing jets, missing transverse mo- mentum and no high-pT electrons or muons is presented. The data represent the complete sample recorded in 2011 by the ATLAS experiment in √s = 7 TeV proton-proton collisions at the Large Hadron Collider, with a total integrated luminosity of 4.7 fb−1. No excess above the Standard Model background expectation is observed. Gluino masses below 940 GeV, and squark masses below 1380 GeV are excluded at the 95% confidence level in simplified models containing only squarks of the first two generations, a gluino octet and a massless neutralino. In MSUGRA/CMSSM models with tan β = 10, A0 = 0 and μ > 0, squarks and gluinos of equal mass are excluded for masses below 1400 GeV. These limits considerably extend the region of supersymmetric parameter space excluded by previous measurements with the ATLAS detector.