Measurement of the Tau Polarization in $Z\rightarrow\tau\tau$ Decays with the ATLAS Detector

This thesis presents a measurement of the tau polarization in Z decays in proton-proton collision at √s = 7 TeV. The measurement is based on 4.6 fb−1 data that was collected in 2011 with the ATLAS experiment situated at the Large Hadron Collider. The polarization was measured in one prong hadronic t...

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Detalles Bibliográficos
Autor principal: Deigaard, Ingrid
Lenguaje:eng
Publicado: 2012
Materias:
Particle Physics - Experiment
Acceso en línea:http://cds.cern.ch/record/1464097
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author Deigaard, Ingrid
author_facet Deigaard, Ingrid
author_sort Deigaard, Ingrid
collection CERN
description This thesis presents a measurement of the tau polarization in Z decays in proton-proton collision at √s = 7 TeV. The measurement is based on 4.6 fb−1 data that was collected in 2011 with the ATLAS experiment situated at the Large Hadron Collider. The polarization was measured in one prong hadronic tau decays, by use of a variable that measures the energy asymmetry between charged and neutral pions. Templates from right- and left-handed taus were fitted to the data. A measurement of the tau polarization was performed and the systematic uncertainties on background and signal were investigated. The result of the measurement was Pτ =−0.258±0.048(stat.)±0.028(MC)±0.073(sys.).
id cern-1464097
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
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spelling cern-14640972019-09-30T06:29:59Zhttp://cds.cern.ch/record/1464097engDeigaard, IngridMeasurement of the Tau Polarization in $Z\rightarrow\tau\tau$ Decays with the ATLAS DetectorParticle Physics - ExperimentThis thesis presents a measurement of the tau polarization in Z decays in proton-proton collision at √s = 7 TeV. The measurement is based on 4.6 fb−1 data that was collected in 2011 with the ATLAS experiment situated at the Large Hadron Collider. The polarization was measured in one prong hadronic tau decays, by use of a variable that measures the energy asymmetry between charged and neutral pions. Templates from right- and left-handed taus were fitted to the data. A measurement of the tau polarization was performed and the systematic uncertainties on background and signal were investigated. The result of the measurement was Pτ =−0.258±0.048(stat.)±0.028(MC)±0.073(sys.).CERN-THESIS-2012-091oai:cds.cern.ch:14640972012-07-26T13:58:31Z
spellingShingle Particle Physics - Experiment
Deigaard, Ingrid
Measurement of the Tau Polarization in $Z\rightarrow\tau\tau$ Decays with the ATLAS Detector
title Measurement of the Tau Polarization in $Z\rightarrow\tau\tau$ Decays with the ATLAS Detector
title_full Measurement of the Tau Polarization in $Z\rightarrow\tau\tau$ Decays with the ATLAS Detector
title_fullStr Measurement of the Tau Polarization in $Z\rightarrow\tau\tau$ Decays with the ATLAS Detector
title_full_unstemmed Measurement of the Tau Polarization in $Z\rightarrow\tau\tau$ Decays with the ATLAS Detector
title_short Measurement of the Tau Polarization in $Z\rightarrow\tau\tau$ Decays with the ATLAS Detector
title_sort measurement of the tau polarization in $z\rightarrow\tau\tau$ decays with the atlas detector
topic Particle Physics - Experiment
url http://cds.cern.ch/record/1464097
work_keys_str_mv AT deigaardingrid measurementofthetaupolarizationinzrightarrowtautaudecayswiththeatlasdetector

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