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Electron efficiency measurements with the ATLAS detector using 2012 LHC proton–proton collision data
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
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Number of Authors: 28532017 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, no 3, article id 195Article in journal (Refereed) Published
Abstract [en]

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 [Formula: see text] = 8 [Formula: see text]. The efficiency of these algorithms, together with the charge misidentification rate, is measured in data and evaluated in simulated samples using electrons from [Formula: see text], [Formula: see text] and [Formula: see text] decays. For these efficiency measurements, the full recorded data set, corresponding to an integrated luminosity of 20.3 fb[Formula: see text], is used. Based on a new reconstruction algorithm used in 2012, the electron reconstruction efficiency is 97% for electrons with [Formula: see text] [Formula: see text] and 99% at [Formula: see text] [Formula: see text]. 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.

Place, publisher, year, edition, pages
Springer, 2017. no 3, article id 195
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-327129DOI: 10.1140/epjc/s10052-017-4756-2ISI: 000398956200005PubMedID: 28579919OAI: oai:DiVA.org:uu-327129DiVA, id: diva2:1129598
Note

ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1140/epjc/s10052-017-4756-2

Available from: 2017-08-04 Created: 2017-08-04 Last updated: 2018-01-03Bibliographically approved

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