Results are presented of a search for new particles decaying to large numbers of jets in association with missing transverse momentum, using 4.7 fb(-1) of pp collision data at root s = 7 TeV collected by the ATLAS experiment at the Large Hadron Collider in 2011. The event selection requires missing transverse momentum, no isolated electrons or muons, and from >= 6 to >= 9 jets. No evidence is found for physics beyond the Standard Model. The results are interpreted in the context of a MSUGRA/CMSSM supersymmetric model, where, for large universal scalar mass m(0), gluino masses smaller than 840 GeV are excluded at the 95% confidence level, extending previously published limits. Within a simplified model containing only a gluino octet and a neutralino, gluino masses smaller than 870 GeV are similarly excluded for neutralino masses below 100 GeV. RI Jones, Roger/H-5578-2011; Wemans, Andre/A-6738-2012; Fazio, Salvatore /G-5156-2010; valente, paolo/A-6640-2010; Takai, Helio/C-3301-2012; Delmastro, Marco/I-5599-2012; Livan, Michele/D-7531-2012

Hunt for new phenomena using large jet multiplicities and missing transverse momentum with ATLAS in 4.7fb(-1) of root s=7 TeV proton-proton collisions

CAPUA, Marcella;CROSETTI, Giovanni;Fazio S.;LA ROTONDA, Laura;MASTROBERARDINO, Anna;Meoni E.;