Electron efficiency measurements with the ATLAS detector using 2012 LHC proton–proton collision data

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Electron efficiency measurements with the ATLAS detector using 2012 LHC proton–proton collision data

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Title: Electron efficiency measurements with the ATLAS detector using 2012 LHC proton–proton collision data
Author: Chan, Stephen Kam Wah; Clark, Brian Lee; Franklin, Melissa; Giromini, Paolo; Huth, John; Ippolito, Valerio; Lazovich, Tomo; Lopez Mateos, David; Morii, Masahiro; Rogan, Christopher S.; Roloff, Jennifer Kathryn; Sun, Siyuan; Tolley, Emma; Tong, Baojia; Tuna, Alexander; Zambito, Stefano

Note: Order does not necessarily reflect citation order of authors.

Citation: ATLAS Collaboration. 2017. “Electron Efficiency Measurements with the ATLAS Detector Using 2012 LHC Proton–proton Collision Data.” The European Physical Journal C 77 (3) (March). doi:10.1140/epjc/s10052-017-4756-2.
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Abstract: This paper describes the algorithms for the reconstruction and identification of electrons in the central region of the ATLAS detector at the Large Hadron Collider (LHC). These algorithms were used for all ATLAS results with electrons in the final state that are based on the 2012 pp collision data produced by the LHC at s√ = 8 TeV. The efficiency of these algorithms, together with the charge misidentification rate, is measured in data and evaluated in simulated samples using electrons from Z→ee, Z→eeγ and J/ψ→ee decays. For these efficiency measurements, the full recorded data set, corresponding to an integrated luminosity of 20.3 fb−1, is used. Based on a new reconstruction algorithm used in 2012, the electron reconstruction efficiency is 97% for electrons with ET=15 GeV and 99% at ET=50 GeV. Combining this with the efficiency of additional selection criteria to reject electrons from background processes or misidentified hadrons, the efficiency to reconstruct and identify electrons at the ATLAS experiment varies from 65% to 95%, depending on the transverse momentum of the electron and background rejection.
Published Version: doi:10.1140/epjc/s10052-017-4756-2
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:32942660
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