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Electron and photon energy calibration with the ATLAS detector using LHC Run 2 data

Aad, G ; Åkesson, Torsten LU orcid ; Doglioni, Caterina LU ; Ekman, Alexander LU ; Hedberg, Vincent LU ; Herde, Hannah LU orcid ; Konya, Balazs LU ; Lytken, Else LU orcid ; Pöttgen, Ruth LU orcid and Simpson, Nathan Daniel LU , et al. (2024) In Journal of Instrumentation 19(2).
Abstract
This paper presents the electron and photon energy calibration obtained with the ATLAS detector using 140 fb−1 of LHC proton-proton collision data recorded at √s = 13 TeV between 2015 and 2018. Methods for the measurement of electron and photon energies are outlined, along with the current knowledge of the passive material in front of the ATLAS electromagnetic calorimeter. The energy calibration steps are discussed in detail, with emphasis on the improvements introduced in this paper. The absolute energy scale is set using a large sample of Z-boson decays into electron-positron pairs, and its residual dependence on the electron energy is used for the first time to further constrain systematic uncertainties. The achieved calibration... (More)
This paper presents the electron and photon energy calibration obtained with the ATLAS detector using 140 fb−1 of LHC proton-proton collision data recorded at √s = 13 TeV between 2015 and 2018. Methods for the measurement of electron and photon energies are outlined, along with the current knowledge of the passive material in front of the ATLAS electromagnetic calorimeter. The energy calibration steps are discussed in detail, with emphasis on the improvements introduced in this paper. The absolute energy scale is set using a large sample of Z-boson decays into electron-positron pairs, and its residual dependence on the electron energy is used for the first time to further constrain systematic uncertainties. The achieved calibration uncertainties are typically 0.05% for electrons from resonant Z-boson decays, 0.4% at ET ∼ 10 GeV, and 0.3% at ET ∼ 1 TeV; for photons at ET ∼ 60 GeV, they are 0.2% on average. This is more than twice as precise as the previous calibration. The new energy calibration is validated using J/ → ee and radiative Z-boson decays. © 2024 Institute of Physics. All rights reserved. (Less)
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Contribution to journal
publication status
published
subject
keywords
calibration, Calorimeter methods; Pattern recognition, cluster finding, fitting methods; Performance of High Energy Physics Detectors, Bosons, Calorimeters, Electron energy levels, Electrons, Pattern recognition, Photons, Tellurium compounds, Calorimeter method;, Cluster finding, Electrons energy, Energy calibration, Fitting method, Fitting method;, High energy physics detector, Performance, Performance of high energy physic detector, Photon energy, Calibration
in
Journal of Instrumentation
volume
19
issue
2
article number
P02009
publisher
IOP Publishing
external identifiers
  • scopus:85185886671
ISSN
1748-0221
DOI
10.1088/1748-0221/19/02/P02009
language
English
LU publication?
yes
id
e006cc7e-6f10-44c9-b531-0608ad773897
date added to LUP
2024-03-28 11:51:04
date last changed
2024-03-28 11:52:05
@article{e006cc7e-6f10-44c9-b531-0608ad773897,
  abstract     = {{This paper presents the electron and photon energy calibration obtained with the ATLAS detector using 140 fb−1 of LHC proton-proton collision data recorded at √s = 13 TeV between 2015 and 2018. Methods for the measurement of electron and photon energies are outlined, along with the current knowledge of the passive material in front of the ATLAS electromagnetic calorimeter. The energy calibration steps are discussed in detail, with emphasis on the improvements introduced in this paper. The absolute energy scale is set using a large sample of Z-boson decays into electron-positron pairs, and its residual dependence on the electron energy is used for the first time to further constrain systematic uncertainties. The achieved calibration uncertainties are typically 0.05% for electrons from resonant Z-boson decays, 0.4% at ET ∼ 10 GeV, and 0.3% at ET ∼ 1 TeV; for photons at ET ∼ 60 GeV, they are 0.2% on average. This is more than twice as precise as the previous calibration. The new energy calibration is validated using J/ → ee and radiative Z-boson decays. © 2024 Institute of Physics. All rights reserved.}},
  author       = {{Aad, G and Åkesson, Torsten and Doglioni, Caterina and Ekman, Alexander and Hedberg, Vincent and Herde, Hannah and Konya, Balazs and Lytken, Else and Pöttgen, Ruth and Simpson, Nathan Daniel and Smirnova, Oxana and Zwalinski, L.}},
  issn         = {{1748-0221}},
  keywords     = {{calibration; Calorimeter methods; Pattern recognition; cluster finding; fitting methods; Performance of High Energy Physics Detectors; Bosons; Calorimeters; Electron energy levels; Electrons; Pattern recognition; Photons; Tellurium compounds; Calorimeter method;; Cluster finding; Electrons energy; Energy calibration; Fitting method; Fitting method;; High energy physics detector; Performance; Performance of high energy physic detector; Photon energy; Calibration}},
  language     = {{eng}},
  number       = {{2}},
  publisher    = {{IOP Publishing}},
  series       = {{Journal of Instrumentation}},
  title        = {{Electron and photon energy calibration with the ATLAS detector using LHC Run 2 data}},
  url          = {{http://dx.doi.org/10.1088/1748-0221/19/02/P02009}},
  doi          = {{10.1088/1748-0221/19/02/P02009}},
  volume       = {{19}},
  year         = {{2024}},
}