Performance of τ-lepton reconstruction and identification in CMS
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The performance of τ-lepton reconstruction and identification algorithms is studied using a data sample of proton-proton collisions at √s = 7 TeV, corresponding to an integrated luminosity of 36 pb−1 collected with the CMS detector at the LHC. The τ 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 τ leptons produced in Z-boson decays. The τ-lepton misidentification rates for jets and electrons are determined.
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CMS Collaboration. "Performance of τ-lepton reconstruction and identification in CMS." Journal of Instrumentation, 7, (2012) IOP Publishing: P01001. http://dx.doi.org/10.1088/1748-0221/7/01/P01001.