CERN Accelerating science

ATLAS Slides
Report number	ATL-PHYS-SLIDE-2010-271
Title	Electron and Photon Performance and Electron pT Spectrum Measurement with ATLAS in pp Collisions at $\sqrt{s}=7 TeV$
Author(s)	Snyder, S (BNL)
Collaboration	ATLAS Collaboration
Submitted to	35th International Conference on High Energy Physics, Paris, France, 22 - 28 Jul 2010
Submitted by	snyder@fnal.gov on 07 Sep 2010
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	EGAMMA
Abstract	We discuss the early performance of electron/photon reconstruction 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 direct photons and a measurement of the purity of this sample. We also demonstrate the reconstruction of J/psi mesons.