  The performance of tau-lepton reconstruction and identification algorithms is
studied using a data sample of proton-proton collisions at sqrt(s)=7 TeV,
corresponding to an integrated luminosity of 36 inverse picobarns collected
with the CMS detector at the LHC. The tau leptons that decay into one or three
charged hadrons, zero or more short-lived neutral hadrons, and a neutrino are
identified using final-state particles reconstructed in the CMS tracker and
electromagnetic calorimeter. The reconstruction efficiency of the algorithms is
measured using tau leptons produced in Z-boson decays. The tau-lepton
misidentification rates for jets and electrons are determined.
