  A search is performed for heavy particle pairs produced in sqrt(s) = 7 TeV
proton-proton collisions with 35 inverse picobarns of data collected by the CMS
experiment at the LHC. The search is sensitive to squarks and gluinos of
generic supersymmetry models, provided they are kinematically accessible, with
minimal assumptions on properties of the lightest superpartner particle. The
kinematic consistency of the selected events is tested against the hypothesis
of heavy particle pair production using the dimensionless razor variable R,
related to the missing transverse energy. The new physics signal is
characterized by a broad peak in the distribution of MR, an event-by-event
indicator of the heavy particle mass scale. This new approach is complementary
to missing transverse energy-based searches. After background modeling based on
data, and background rejection based on R and MR, no significant excess of
events is found beyond the standard model expectations. The results are
interpreted in the context of the constrained minimal supersymmetric standard
model as well as two simplified supersymmetry models.
