Commissioning of the ATLAS Muon Trigger Selection

TL;DR

This paper evaluates the performance of the ATLAS muon trigger system using LHC data, focusing on commissioning, prompt muon selection, and trigger evolution with luminosity.

Contribution

It presents the first comprehensive evaluation of the ATLAS muon trigger performance during commissioning with real data.

Findings

Successful commissioning of the muon trigger system.

Effective selection of prompt muons from J/ψ.

Insights into trigger evolution with increasing luminosity.

Abstract

The performance of the three-level ATLAS muon trigger as evaluated by using LHC data is presented. Events have been selected by using only the hardware-based Level-1 trigger in order to commission and to subsequently enable the (software-based) selections of the High Level Trigger. Studies aiming at selecting prompt muons from J/{\psi} and at reducing non prompt muon contamination have been performed. A brief overview on how the muon triggers evolve with increasing luminosity is given.