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

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.