Search for new physics with single-leptons at the LHC

Updated results are reported from a search for an excess of events containing a single, isolated, high-transverse momentum lepton (electron or muon), energetic jets, and large missing transverse momentum. The analysis is based on a 4.7 fb$^{-1}$ sample of proton-proton collisions at a center-of-mass energy of 7 TeV. The observed yields in the signal regions are consistent with predictions of the standard model backgrounds, which are based primarily on control samples in the data. The results are interpreted in terms of limits on the parameter space for the constrained minimal supersymmetric extension of the standard model.