Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data

Agustoni, Marco; Beck, Hans Peter; Cervelli, Alberto; Ereditato, Antonio; Gallo, Valentina; Haug, Sigve; Kruker, Tobias; Marti, Lukas; Meloni, Federico; Schneider, Basil; Sciacca, Gianfranco; Stramaglia, Maria; Stucci, Stefania Antonia; Weber, Michael (2014). Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data. European physical journal. C - particles and fields, 74(10) EDP Sciences 10.1140/epjc/s10052-014-3071-4

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This paper presents the electron and photon energy calibration achieved with the ATLAS detector using about 25 fb−1 of LHC proton–proton collision data taken at centre-of-mass energies of √s = 7 and 8 TeV. The reconstruction of electron and photon energies is optimised using multivariate algorithms. The response of the calorimeter layers is equalised in data and simulation, and the longitudinal profile of the electromagnetic showers is exploited to estimate the passive material in front of the calorimeter and
reoptimise the detector simulation. After all corrections, the Z resonance is used to set the absolute energy scale. For electrons from Z decays, the achieved calibration is typically
accurate to 0.05% in most of the detector acceptance, rising to 0.2% in regions with large amounts of passive material. The remaining inaccuracy is less than 0.2–1% for electrons
with a transverse energy of 10 GeV, and is on average 0.3% for photons. The detector resolution is determined with a relative inaccuracy of less than 10% for electrons and photons up to 60 GeV transverse energy, rising to 40% for transverse energies above 500 GeV.

Item Type:

Journal Article (Original Article)


10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Agustoni, Marco, Beck, Hans Peter, Cervelli, Alberto, Ereditato, Antonio, Gallo, Valentina, Haug, Sigve, Kruker, Tobias, Marti, Lukas, Meloni, Federico, Schneider, Basil, Sciacca, Gianfranco, Stramaglia, Maria Elena, Stucci, Stefania, Weber, Michele


500 Science > 530 Physics




EDP Sciences




Jan Dirk Brinksma

Date Deposited:

10 Jun 2015 09:06

Last Modified:

02 Mar 2023 23:26

Publisher DOI:


Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt.





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