Electron and Photon Performance and Electron pT Spectrum Measurement with ATLAS in pp Collisions at sqrt(s) = 7 TeV
Abstract
We discuss the early performance of the reconstruction of electrons and photons at ATLAS with a center-of-mass energy of 7 TeV. Using a data sample of about 15 nb-1, we present a measurement of the transverse momentum distribution of inclusive electrons, as well as an observation of prompt photons and a measurement of the purity of this sample. We also demonstrate the reconstruction of J/psi mesons with a data sample of 78 nb-1.
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