Reconstruction and Identification of Hadronic Tau Decays with ATLAS

TL;DR

This paper discusses the methods used by the ATLAS detector to reconstruct and identify hadronically decaying tau leptons, crucial for Higgs and SUSY searches, emphasizing background discrimination techniques.

Contribution

It presents the reconstruction algorithm and performance evaluation for tau lepton identification in the ATLAS detector, highlighting background rejection capabilities.

Findings

Effective tau reconstruction across a wide energy range

High discrimination power against QCD jet backgrounds

Improved tau identification performance

Abstract

The presence of tau leptons in the final state is an important signature in many Higgs boson and SUSY searches. With the ATLAS detector, hadronically decaying tau leptons can be reconstructed in a wide range of transverse energies. The reconstruction algorithm for hadronically decaying tau leptons is explained and the performance of tau lepton identification is shown. Particularly important is the discrimination of hadronically decaying tau leptons against overwhelming backgrounds from QCD jets.