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

M Aaboud1, G Aad2, B Abbott3

  • 1Faculté des Sciences, Université Mohamed Premier and LPTPM, Oujda, Morocco.

The European Physical Journal. C, Particles and Fields
|June 6, 2017
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Researchers developed new algorithms for reconstructing and identifying electrons at the Large Hadron Collider (LHC). These advanced methods achieve high efficiency in the ATLAS experiment, crucial for analyzing 2012 proton-proton collision data.

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Area of Science:

  • High-energy particle physics
  • Collider physics
  • Particle detection

Background:

  • The ATLAS detector at the Large Hadron Collider (LHC) requires precise electron reconstruction and identification for physics analyses.
  • Accurate electron identification is essential for studying Standard Model processes and searching for new physics.

Purpose of the Study:

  • To describe the algorithms used for electron reconstruction and identification in the ATLAS detector.
  • To present the performance of these algorithms using 2012 proton-proton collision data.

Main Methods:

  • Development and application of new electron reconstruction algorithms for the ATLAS detector.
  • Efficiency and charge misidentification rate measurements using data from Z and J/psi decays.
  • Evaluation of algorithms using simulated samples and 20.3 fb^-1 of integrated luminosity.

Main Results:

  • Electron reconstruction efficiency of 97% for |eta| < 1.37 and 99% for 1.52 < |eta| < 2.47.
  • Overall electron reconstruction and identification efficiency ranges from 65% to 95% depending on transverse momentum and background rejection.
  • Charge misidentification rates were measured and evaluated.

Conclusions:

  • The developed algorithms provide high efficiency and reliable performance for electron reconstruction and identification at ATLAS.
  • These algorithms are crucial for the analysis of 2012 LHC data and future high-energy physics research.
  • The performance meets the demands for precise measurements in particle physics.