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The ATLAS Hadronic Tau Trigger

As proton-proton collisions at the LHC reach luminosities close to 10$^{\mathrm{34}}$ cm$^{\mathrm{-2}}$ s $^{\mathrm{-1}}$, the strategies for triggering have become more important than ever for physics analyses. Simplistic single tau lepton triggers suffer from severe rate limitation, despite the...

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Autor principal: Brost, E
Lenguaje:eng
Publicado: 2014
Materias:
Acceso en línea:http://cds.cern.ch/record/1693474
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author Brost, E
author_facet Brost, E
author_sort Brost, E
collection CERN
description As proton-proton collisions at the LHC reach luminosities close to 10$^{\mathrm{34}}$ cm$^{\mathrm{-2}}$ s $^{\mathrm{-1}}$, the strategies for triggering have become more important than ever for physics analyses. Simplistic single tau lepton triggers suffer from severe rate limitation, despite the sophisticated algorithms used in the tau identification. The development of further fast algorithms and the design of topological selections are the main challenges to allow a large program of physics analysis. The tau triggers provide many opportunities to study new physics beyond the Standard Model, and to get precise measurements of the properties of the Higgs boson decaying to tau-leptons. We present the performance of the hadronic tau trigger taken in Run 1 data with the ATLAS detector at $\sqrt{s}$ = 8 TeV pp collision. One of the major challenges is to sustain high efficiencies in events with multiple interactions. To do this we introduced faster tracking methods, multivariate selection techniques, and new topological criteria in the software trigger. We present measurements of the trigger efficiency using Z to tau tau events as the application to searches for tau tau resonances, such as the Higgs boson searches. We also outline the upgrade plan expected for Run 2 for the 14(13) TeV LHC pp collisions.
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institution Organización Europea para la Investigación Nuclear
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publishDate 2014
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spelling cern-16934742019-09-30T06:29:59Zhttp://cds.cern.ch/record/1693474engBrost, EThe ATLAS Hadronic Tau TriggerDetectors and Experimental TechniquesAs proton-proton collisions at the LHC reach luminosities close to 10$^{\mathrm{34}}$ cm$^{\mathrm{-2}}$ s $^{\mathrm{-1}}$, the strategies for triggering have become more important than ever for physics analyses. Simplistic single tau lepton triggers suffer from severe rate limitation, despite the sophisticated algorithms used in the tau identification. The development of further fast algorithms and the design of topological selections are the main challenges to allow a large program of physics analysis. The tau triggers provide many opportunities to study new physics beyond the Standard Model, and to get precise measurements of the properties of the Higgs boson decaying to tau-leptons. We present the performance of the hadronic tau trigger taken in Run 1 data with the ATLAS detector at $\sqrt{s}$ = 8 TeV pp collision. One of the major challenges is to sustain high efficiencies in events with multiple interactions. To do this we introduced faster tracking methods, multivariate selection techniques, and new topological criteria in the software trigger. We present measurements of the trigger efficiency using Z to tau tau events as the application to searches for tau tau resonances, such as the Higgs boson searches. We also outline the upgrade plan expected for Run 2 for the 14(13) TeV LHC pp collisions.ATL-DAQ-SLIDE-2014-129oai:cds.cern.ch:16934742014-04-04
spellingShingle Detectors and Experimental Techniques
Brost, E
The ATLAS Hadronic Tau Trigger
title The ATLAS Hadronic Tau Trigger
title_full The ATLAS Hadronic Tau Trigger
title_fullStr The ATLAS Hadronic Tau Trigger
title_full_unstemmed The ATLAS Hadronic Tau Trigger
title_short The ATLAS Hadronic Tau Trigger
title_sort atlas hadronic tau trigger
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1693474
work_keys_str_mv AT broste theatlashadronictautrigger
AT broste atlashadronictautrigger