Tau Lepton Reconstruction and Identification at ATLAS

TL;DR

This paper discusses the methods and performance of reconstructing and identifying tau leptons in the ATLAS detector at the LHC, crucial for various physics analyses including Higgs and Supersymmetry searches.

Contribution

It provides an update on tau reconstruction and identification techniques, including efficiency measurements and systematic uncertainties, validated against Monte Carlo simulations.

Findings

Tau identification efficiencies are measured using W and Z decay events.

Systematic uncertainties in tau identification are quantified.

Results are compared with Monte Carlo predictions.

Abstract

Tau leptons play an important role in the physics program at the LHC. They are used in searches for new phenomena like the Higgs boson or Supersymmetry and in electroweak measurements. Identifying hadronically decaying tau leptons with good performance is an essential part of these analyses. We present the current status of the tau reconstruction and identification at the LHC with the ATLAS detector. The tau identification efficiencies and their systematic uncertainties are measured using W to tau nu and Z to tau tau events, and compared with the predictions from Monte Carlo simulations.