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 root(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 tilde 10 GeV, and 0.3% at ET tilde 1 TeV; for photons at ET tilde 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/psi -> ee and radiative Z-boson decays.

Aad, G., Abbott, B., Abeling, K., Abicht, N.j., Abidi, S.h., Aboulhorma, A., et al. (2024). Electron and photon energy calibration with the ATLAS detector using LHC Run 2 data. JOURNAL OF INSTRUMENTATION, 19(02) [10.1088/1748-0221/19/02/P02009].

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

Aielli, G.;Camarri, P.;Cerrito, L.;De Sanctis, U.;Di Ciaccio, A.;
2024-01-01

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 root(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 tilde 10 GeV, and 0.3% at ET tilde 1 TeV; for photons at ET tilde 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/psi -> ee and radiative Z-boson decays.
2024
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/01
English
Con Impact Factor ISI
Calorimeter methods; Pattern recognition, cluster finding, calibration and fitting methods; Performance of High Energy Physics Detectors
Aad, G., Abbott, B., Abeling, K., Abicht, N.j., Abidi, S.h., Aboulhorma, A., et al. (2024). Electron and photon energy calibration with the ATLAS detector using LHC Run 2 data. JOURNAL OF INSTRUMENTATION, 19(02) [10.1088/1748-0221/19/02/P02009].
Aad, G; Abbott, B; Abeling, K; Abicht, Nj; Abidi, Sh; Aboulhorma, A; Abramowicz, H; Abreu, H; Abulaiti, Y; Acharya, Bs; Adam Bourdarios, C; Adamczyk, ...espandi
Articolo su rivista
File in questo prodotto:
File Dimensione Formato  
jinst.19.2024.P02009.pdf

accesso aperto

Tipologia: Versione Editoriale (PDF)
Licenza: Creative commons
Dimensione 3.15 MB
Formato Adobe PDF
3.15 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/350924
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 15
  • ???jsp.display-item.citation.isi??? 0
social impact