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Measurements of ttbar+X using the ATLAS detector

The large integrated luminosity provided by the LHC enables the production significant numbers of top quark pairs in association with additional jets or additional gauge bosons. The production of top quark pairs in association with $W$ and $Z$ bosons is presented. The measurement uses events with mu...

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Autor principal: Bessidskaia Bylund, Olga
Lenguaje:eng
Publicado: 2015
Materias:
Acceso en línea:http://cds.cern.ch/record/2058076
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author Bessidskaia Bylund, Olga
author_facet Bessidskaia Bylund, Olga
author_sort Bessidskaia Bylund, Olga
collection CERN
description The large integrated luminosity provided by the LHC enables the production significant numbers of top quark pairs in association with additional jets or additional gauge bosons. The production of top quark pairs in association with $W$ and $Z$ bosons is presented. The measurement uses events with multiple leptons and in particular probes the coupling between the top quark and the $Z$ boson. A significance of five standard deviations is found for the production of a top quark pair with a $W$ boson. The cross section measurement of photons produced in association with top quark pairs is presented. The measurement uses a data driven technique to extract the signal from the background and achieves a significance of greater than 5 standard deviations. In addition, the production cross section of top quark pairs in association with jets is presented. This process allows better understanding of QCD effects and is an important background to many searches for physics beyond the Standard Model.
id cern-2058076
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2015
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spelling cern-20580762019-09-30T06:29:59Zhttp://cds.cern.ch/record/2058076engBessidskaia Bylund, OlgaMeasurements of ttbar+X using the ATLAS detectorParticle Physics - ExperimentThe large integrated luminosity provided by the LHC enables the production significant numbers of top quark pairs in association with additional jets or additional gauge bosons. The production of top quark pairs in association with $W$ and $Z$ bosons is presented. The measurement uses events with multiple leptons and in particular probes the coupling between the top quark and the $Z$ boson. A significance of five standard deviations is found for the production of a top quark pair with a $W$ boson. The cross section measurement of photons produced in association with top quark pairs is presented. The measurement uses a data driven technique to extract the signal from the background and achieves a significance of greater than 5 standard deviations. In addition, the production cross section of top quark pairs in association with jets is presented. This process allows better understanding of QCD effects and is an important background to many searches for physics beyond the Standard Model.ATL-PHYS-PROC-2015-100oai:cds.cern.ch:20580762015-10-08
spellingShingle Particle Physics - Experiment
Bessidskaia Bylund, Olga
Measurements of ttbar+X using the ATLAS detector
title Measurements of ttbar+X using the ATLAS detector
title_full Measurements of ttbar+X using the ATLAS detector
title_fullStr Measurements of ttbar+X using the ATLAS detector
title_full_unstemmed Measurements of ttbar+X using the ATLAS detector
title_short Measurements of ttbar+X using the ATLAS detector
title_sort measurements of ttbar+x using the atlas detector
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2058076
work_keys_str_mv AT bessidskaiabylundolga measurementsofttbarxusingtheatlasdetector