  A search for physics beyond the standard model is performed in events with at
least three jets and large missing transverse momentum produced in
proton-proton collisions at sqrt(s) = 7 TeV. No significant excess of events
above the expected backgrounds is observed in 4.98 inverse femtobarns of data
collected with the CMS detector at the Large Hadron Collider. The results are
presented in the context of the constrained minimal supersymmetric extension of
the standard model and more generically for simplified models. For the
simplified models of gluino-gluino and squark-squark production, gluino masses
below 1.0 TeV and squark masses below 0.76 TeV are excluded in case the
lightest supersymmetric particle mass is below 200 GeV. These results
significantly extend previous searches.
