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

M. Aaboud; G. Aad; B. Abbott; J. Adballah; O. Abdinov; B Abeloos; O.S. AbouZeid; NL Abraham; H. Abramowicz; H. Abreu; R. Abreu; Y. Abulaiti; B.S. Acharya; H. Adachi; L. Adamczyk; David L. Adams; J P Adelman; S. Adomeit; T. Adye; A. A. Affolder; Mogens Dam; Jørn Dines Hansen; Jørgen Beck Hansen; Stefania Xella; Peter Henrik Hansen; Troels Christian Petersen; Ask Emil Løvschall-Jensen; xtf324 xtf324; James William Monk; Lars Egholm Pedersen; Graig Wiglesworth; Gorm Aske Gram Krohn Galster; Simon Holm Stark; Geert-Jan Besjes; Fabian Alexander Jürgen Thiele; Flavia de Almeida Dias; Milena Bajic

doi:10.1140/epjc/s10052-017-4756-2

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

M. Aaboud, G. Aad, B. Abbott, J. Adballah, O. Abdinov, B Abeloos, O.S. AbouZeid, NL Abraham, H. Abramowicz, H. Abreu, R. Abreu, Y. Abulaiti, B.S. Acharya, H. Adachi, L. Adamczyk, David L. Adams, J P Adelman, S. Adomeit, T. Adye, A. A. AffolderMogens Dam, Jørn Dines Hansen, Jørgen Beck Hansen, Stefania Xella, Peter Henrik Hansen, Troels Christian Petersen, Ask Emil Løvschall-Jensen, xtf324 xtf324, James William Monk, Lars Egholm Pedersen, Graig Wiglesworth, Gorm Aske Gram Krohn Galster, Simon Holm Stark, Geert-Jan Besjes, Fabian Alexander Jürgen Thiele, Flavia de Almeida Dias, Milena Bajic

Experimental Particle Physics

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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 E_T= 15 GeV and 99% at E_T= 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.

Original language	English
Article number	195
Journal	European Physical Journal C
Volume	77
Issue number	3
ISSN	1434-6044
DOIs	https://doi.org/10.1140/epjc/s10052-017-4756-2
Publication status	Published - 1 Mar 2017

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Aaboud, M., Aad, G., Abbott, B., Adballah, J., Abdinov, O., Abeloos, B., AbouZeid, O. S., Abraham, NL., Abramowicz, H., Abreu, H., Abreu, R., Abulaiti, Y., Acharya, B. S., Adachi, H., Adamczyk, L., Adams, D. L., Adelman, J. P., Adomeit, S., Adye, T., ... Bajic, M. (2017). Electron efficiency measurements with the ATLAS detector using 2012 LHC proton-proton collision data. European Physical Journal C, 77(3), Article 195. https://doi.org/10.1140/epjc/s10052-017-4756-2

Aaboud, M, Aad, G, Abbott, B, Adballah, J, Abdinov, O, Abeloos, B, AbouZeid, OS, Abraham, NL, Abramowicz, H, Abreu, H, Abreu, R, Abulaiti, Y, Acharya, BS, Adachi, H, Adamczyk, L, Adams, DL, Adelman, JP, Adomeit, S, Adye, T, Affolder, AA, Dam, M , Hansen, JD , Hansen, JB , Xella, S , Hansen, PH , Petersen, TC, Løvschall-Jensen, AE, xtf324, X, Monk, JW, Pedersen, LE, Wiglesworth, G, Galster, GAGK, Stark, SH, Besjes, G-J, Thiele, FAJ, de Almeida Dias, F & Bajic, M 2017, 'Electron efficiency measurements with the ATLAS detector using 2012 LHC proton-proton collision data', European Physical Journal C, vol. 77, no. 3, 195. https://doi.org/10.1140/epjc/s10052-017-4756-2

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title = "Electron efficiency measurements with the ATLAS detector using 2012 LHC proton-proton collision data",

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.",

author = "M. Aaboud and G. Aad and B. Abbott and J. Adballah and O. Abdinov and B Abeloos and O.S. AbouZeid and NL Abraham and H. Abramowicz and H. Abreu and R. Abreu and Y. Abulaiti and B.S. Acharya and H. Adachi and L. Adamczyk and Adams, {David L.} and Adelman, {J P} and S. Adomeit and T. Adye and Affolder, {A. A.} and Mogens Dam and Hansen, {J{\o}rn Dines} and Hansen, {J{\o}rgen Beck} and Stefania Xella and Hansen, {Peter Henrik} and Petersen, {Troels Christian} and L{\o}vschall-Jensen, {Ask Emil} and xtf324 xtf324 and Monk, {James William} and Pedersen, {Lars Egholm} and Graig Wiglesworth and Galster, {Gorm Aske Gram Krohn} and Stark, {Simon Holm} and Geert-Jan Besjes and Thiele, {Fabian Alexander J{\"u}rgen} and {de Almeida Dias}, Flavia and Milena Bajic",

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T1 - Electron efficiency measurements with the ATLAS detector using 2012 LHC proton-proton collision data

AU - Aaboud, M.

AU - Aad, G.

AU - Abbott, B.

AU - Adballah, J.

AU - Abdinov, O.

AU - Abeloos, B

AU - AbouZeid, O.S.

AU - Abraham, NL

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abreu, R.

AU - Abulaiti, Y.

AU - Acharya, B.S.

AU - Adachi, H.

AU - Adamczyk, L.

AU - Adams, David L.

AU - Adelman, J P

AU - Adomeit, S.

AU - Adye, T.

AU - Affolder, A. A.

AU - Dam, Mogens

AU - Hansen, Jørn Dines

AU - Hansen, Jørgen Beck

AU - Xella, Stefania

AU - Hansen, Peter Henrik

AU - Petersen, Troels Christian

AU - Løvschall-Jensen, Ask Emil

AU - xtf324, xtf324

AU - Monk, James William

AU - Pedersen, Lars Egholm

AU - Wiglesworth, Graig

AU - Galster, Gorm Aske Gram Krohn

AU - Stark, Simon Holm

AU - Besjes, Geert-Jan

AU - Thiele, Fabian Alexander Jürgen

AU - de Almeida Dias, Flavia

AU - Bajic, Milena

PY - 2017/3/1

Y1 - 2017/3/1

N2 - 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.

AB - 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.

U2 - 10.1140/epjc/s10052-017-4756-2

DO - 10.1140/epjc/s10052-017-4756-2

M3 - Journal article

C2 - 28579919

SN - 1434-6044

VL - 77

JO - European Physical Journal C

JF - European Physical Journal C

IS - 3

M1 - 195

ER -

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

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