Performance of the ATLAS Tau and Missing Energy triggers with 7 TeV proton proton collisions at the LHC

TL;DR

This paper evaluates the performance of ATLAS tau and missing energy triggers using 7 TeV proton-proton collision data from the LHC, comparing real data with simulations to assess accuracy and identify discrepancies.

Contribution

It provides a detailed comparison of trigger performance between data and Monte Carlo simulations, highlighting areas of agreement and discrepancy for the first time at 7 TeV.

Findings

Tau trigger results agree well with simulations

Minor deviations in tau shower shape quantities

Missing transverse energy correlates well with offline reconstructions

Abstract

A study of the performance of the ATLAS tau and missing energy triggers with data collected in spring 2010 at {\surd}s = 7 TeV proton-proton collisions at the Large Hadron Collider (LHC) is presented. A comparison was performed between data and Monte Carlo simulations for the tau and missing transverse energy triggers. As well as a comparison between missing transverse energy trigger quantities and their offline reconstructed counterparts. Tau trigger results compare well with predictions from Monte Carlo simulations. Slight deviations are observed for tau shower shape quantities. Possible sources contributing to the discrepancy such as the simulation of the underlying event are currently being studied. The missing transverse energy reconstructed by the Event Filter is well correlated with the offline result. In addition, there is good agreement between the results obtained with collision data and Monte Carlo simulations.