Search for squarks and gluinos using final states with jets and missing transverse momentum with the ATLAS detector in root s=7 TeV proton-proton collisions RID F-6345-2010 RID A-4857-2011 RID F-2602-2010 RID A-9201-2012 RID F-7696-2011 RID B-1016-2012 RID A-6738-2012 RID C-5889-2009 RID G-5156-2010 RID A-9192-2012 RID C-1161-2011 RID H-5578-2011 RID G-6305-2011 RID F-7543-2011 RID B-2261-2010 RID F-3085-2011 RID B-4633-2010 RID G-1087-2011 RID B-6717-2011 RID A-6640-2010 RID C-9883-2009

A search for squarks and gluinos in final states containing jets, missing transverse momentum and no electrons or muons is presented. The data were recorded by the ATLAS experiment in root s = 7 TeV proton-proton collisions at the Large Hadron Collider. No excess above the Standard Model background expectation was observed in 35 pb(-1) of analysed data. Gluino masses below 500 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. The exclusion increases to 870 GeV for equal mass squarks and gluinos. In MSUGRA/CMSSM models with tan beta = 3, A(0) = 0 and mu > 0, squarks and gluinos of equal mass are excluded below 775 GeV. These are the most stringent limits to date. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.