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Triggering in the ATLAS experiment

The ATLAS experiment at the LHC can record about 1 kHz of physics collisions, out of an LHC design bunch crossing rate of 40 MHz. To achieve a high selection efficiency for rare physics events (such as beyond the Standard Model physics) while reducing the significant background rate, a two-level tri...

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Autor principal: Montejo Berlingen, Javier
Lenguaje:eng
Publicado: 2020
Materias:
Acceso en línea:https://dx.doi.org/10.22323/1.390.0756
http://cds.cern.ch/record/2742661
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author Montejo Berlingen, Javier
author_facet Montejo Berlingen, Javier
author_sort Montejo Berlingen, Javier
collection CERN
description The ATLAS experiment at the LHC can record about 1 kHz of physics collisions, out of an LHC design bunch crossing rate of 40 MHz. To achieve a high selection efficiency for rare physics events (such as beyond the Standard Model physics) while reducing the significant background rate, a two-level trigger system is used. The event selection is based on physics signatures, such as the presence of energetic leptons, photons, jets or missing energy. In addition, the trigger system exploits algorithms using topological information and multivariate methods to carry out the filtering for the many physics analyses pursued by the ATLAS collaboration. In Run 2, around 1500 individual selections, the trigger chains, are comprised in the trigger menu specifying the selection algorithms to be used for data taking, their rate and the bandwidth. Trigger menus must reflect the physics goals for a given data-taking period, taking the instantaneous luminosity of the LHC and limitations from the ATLAS detector readout and offline processing farm into account. An overview of the 2015-2018 trigger and its performance is presented.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2020
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spelling cern-27426612021-10-11T10:04:18Zdoi:10.22323/1.390.0756http://cds.cern.ch/record/2742661engMontejo Berlingen, JavierTriggering in the ATLAS experimentParticle Physics - ExperimentThe ATLAS experiment at the LHC can record about 1 kHz of physics collisions, out of an LHC design bunch crossing rate of 40 MHz. To achieve a high selection efficiency for rare physics events (such as beyond the Standard Model physics) while reducing the significant background rate, a two-level trigger system is used. The event selection is based on physics signatures, such as the presence of energetic leptons, photons, jets or missing energy. In addition, the trigger system exploits algorithms using topological information and multivariate methods to carry out the filtering for the many physics analyses pursued by the ATLAS collaboration. In Run 2, around 1500 individual selections, the trigger chains, are comprised in the trigger menu specifying the selection algorithms to be used for data taking, their rate and the bandwidth. Trigger menus must reflect the physics goals for a given data-taking period, taking the instantaneous luminosity of the LHC and limitations from the ATLAS detector readout and offline processing farm into account. An overview of the 2015-2018 trigger and its performance is presented.ATL-DAQ-PROC-2020-023oai:cds.cern.ch:27426612020-10-23
spellingShingle Particle Physics - Experiment
Montejo Berlingen, Javier
Triggering in the ATLAS experiment
title Triggering in the ATLAS experiment
title_full Triggering in the ATLAS experiment
title_fullStr Triggering in the ATLAS experiment
title_full_unstemmed Triggering in the ATLAS experiment
title_short Triggering in the ATLAS experiment
title_sort triggering in the atlas experiment
topic Particle Physics - Experiment
url https://dx.doi.org/10.22323/1.390.0756
http://cds.cern.ch/record/2742661
work_keys_str_mv AT montejoberlingenjavier triggeringintheatlasexperiment