This page features public results from the ATLAS Electron and Photon Performance Group.

For preliminary public plots see bottom of page.

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Public PLOTS

2022

• EGAM-2022-01: Electron performance in 2016 p+Pb collisions
• EGAM-2022-02: Electron efficiency measurements with full Run2 superseeded by EGAM-2021-01
• EGAM-2022-03: Zee peak with first Run3 data
• EGAM-2022-04: Electron identification efficiency with Run3 early data

2021

• EGAM-2021-01: Photon identification efficiency measurements in full Run 2 data
• EGAM-2021-02: Photon conversion fractions for HL-LHC : Photon conversion

2020

• EGAM-2020-001: Egamma shower shapes in Geant4 10.6.

2019

• EGAM-2019-01: In-situ electromagnetic energy scale calibration, for low and high pile-up datasets.
• EGAM-2019-02: Cut maps on topoETcone20 and pTvarcone20, in the (|eta|,ET) plane, for the electron Gradient isolation working point.
• EGAM-2019-03: Forward (2.5 < || < 4.9) electron identification efficiency measurements and energy calibration.

2018

• EGAM-2018-001: Summary of electron and photon energy calibration with 2015 and 2016 data.
• EGAM-2018-002: Electron efficiency measurements in 2017 data and electron identification discriminating variables in 2016.
• EGAM-2018-003: Z to ee mass distribution for early 2018 data.
• EGAM-2018-004: Z to ee mass distribution for 2017 data : comparison of low-mu and standard runs.
• EGAM-2018-005: Electron identification discriminating variables and efficiency measurements in 2017 data : evolution versus pileup
• EGAM-2018-006: Electron isolation efficiency measurements in 2017 data : evolution versus $p_{\mathrm{T}}, \eta$ and pileup
• EGAM-2018-007: Photon identification and isolation efficiency measurements in 2017 data : evolution versus ET and pileup.
• EGAM-2018-008: Z to ee invariant mass distribution and evolution with the average number of pp-collisions in 128 fb$^{-1}$ of Run II data.

2017

• Expected electron and photon energy calibration performance with the ATLAS detector using Super-Clusters superseeded by ATL-PHYS-PUB-2017-022
• Central electrons energy scale factors and resolution constant term using Z→ee events from 2015 and 2016 data (Winter 2017) superseeded by EGAM-2017-005
• Electron reconstruction and identification efficiency measurements in 2016 Data
• Photon identification efficiencies using the full 2015+2016 dataset
• EGAM-2017-005: Central electrons energy scale factors and resolution constant term using Z→ee events from 2015 and 2016 data (Summer 2017)
• Z to ee mass distribution for early 2017 data
• Measurement of material up to the first layer of the EM calorimeter using 2015 and 2016 data.
• Photon isolation efficiencies using radiative Z decays in 2017 data.
• EGAM-2017-009: Evolution of Z to ee mass with the average number of pp-collisions in 2017 data. superseeded by EGAM-2017-010
• EGAM-2017-010: Evolution of Z to ee mass and photon ID and isolation efficiencies with the average number of pp-collisions in 2017 data.
• EGAM-2017-011: Evolution of electron identification efficiencies with the average number of pp-collisions in 2017 data.

2016

• Z->ee mass distribution for low and high mu events in 2016 data
• ATLAS Electron/Photon Identification and Calibration performance as a function of pile-up during the 2016 LHC data taking
• Optimization of electron likelihood identification for 2015 Pb-Pb collisions
• Photon Identification Effieciencies Using 2016 Data
• Electron identification efficiency measured with Z->ee events using 2016 data
• Reconstructed invariant mass of Z->ee candidates in early 2016 and 2015 data

2015

• Electron isolation efficiency, full 2015 data with 25ns bunch spacing
• Electron reconstruction and identification efficiencies, full 2015 data with 25ns bunch spacing
• Electron identification efficiency with early 2015 data
• Photon conversion reconstruction
• Electron shower shapes, tracking, isolation and invariant mass distributions from Z→ee and J/ψ→ee events
• Efficiency of the photon identification for 2015
• pi0->gamma gamma with first May 2015 13 TeV commissioning data

2014

• Measurements of the photon identification efficiencies using 20.3 fb^-1 of pp collisions collected by ATLAS at √s = 8 TeV in 2012
• Illustration of experimental methods for data-driven measurements of electron efficiencies

2013

• Electron Efficiency Measurements for 2012 and 2011 Data
• Photon Shower Shapes Data/MC Comparisons from Z+γ events
• Inclusive E_T spectrum of isolated photon candidates in 20.3 fb^-1 of pp data at 8 TeV
• Photon Efficiency Measurement with Radiative Photons in Z events (Z->llg) (All 2012, 20 fb-1)

2012

• Electron energy response stability with pile-up in 2012 data up to HCP-dataset (Sep. 2012, 13 fb-1)
• Electron energy response stability with time in 2012 data up to HCP-dataset (Sep. 2012, 13 fb-1)
• Stability of photon conversion reconstruction with pile-up
• Electron energy response stability with pile-up in 2012 data
• Electron efficiency measurements in early 2012 OBSOLETE
• Calorimeter isolation with TopoClusters versus pile-up
• Electron energy response stability with time and pile-up
• Electron identification efficiency dependence on pileup (update)

2011

• Calorimeter isolation versus out-of-time pile-up
• Pile-up impact on calorimeter pointing
• Identification efficiency measurement for electrons with transverse energy between 7 and 50 GeV OBSOLETE
• Calibrated Z->ee mass with 2011 data
• Electron identification efficiency dependence on pileup
• Data/MC Comparison for Calorimeter Shower Shapes of High Et Electrons
• Position Resolution of Photon Conversions
• Calorimeter Energy Response with π⁰→γγ
• Update of Inter-alignment between the electromagnetic calorimeter and the inner detector
• Inter-alignment between the electromagnetic calorimeter and the inner detector OBSOLETE
• Calibrated J/Psi invariant mass OBSOLETE
• Central-Forward calibrated Z -> ee invariant mass OBSOLETE
• Photon conversion plots 2011

2010

• Calibrated Z->ee mass OBSOLETE
• ET distribution of inclusive electron candidates . OBSOLETE
• Di-electron Invariant Mass Spectrum OBSOLETE
• Calibrated Z->ee mass OBSOLETE
• pT/ET for converted photon candidates
• display photon/pi0
• Electron performance of the ATLAS detector using the J/psi -> e + e - decays
• Photon conversion plots
• Electron plots
• J/psi ->e+ e- plots
• Neutral pion plots

2009

• ObsoleteEgammaResults (here only for historical reasons please do use updated plots)

CSC Plots

• Egamma CSC Chapter Figures

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