Using ATLAS data corresponding to 70 +- 8 nb^-1 of integrated luminosity from
the 7 TeV proton-proton collisions at the LHC, distributions of relevant
supersymmetry-sensitive variables are shown for the final state containing
jets, missing transverse momentum and one isolated electron or muon. With
increased integrated luminosities, selections based on these distributions will
be used in the search for supersymmetric particles: it is thus important to
show that the Standard Model backgrounds to these searches are under good
control.Comment: 3 pages, to appear in the Proceedings of the Hadron Collider Physics
Symposium 2010, Toronto, Ontario, Canada, 23 - 27 Aug 2010, available on the
CERN document server under the number ATL-PHYS-PROC-2010-07