Spin Correlation and W Helicity in Top Events with ATLAS

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In 7 TeV proton-proton collisions at the LHC, pairs of top and anti-top quarks are expected to be mostly produced through gluon fusion, in contrast to production at the Tevatron, where quark annihilation dominates. The ATLAS experiment has now recorded a large number of top quark pairs, allowing thi...

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Autor principal: Juengst, M
Lenguaje:eng
Publicado: 2012
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/1490274
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author Juengst, M
author_facet Juengst, M
author_sort Juengst, M
collection CERN
description In 7 TeV proton-proton collisions at the LHC, pairs of top and anti-top quarks are expected to be mostly produced through gluon fusion, in contrast to production at the Tevatron, where quark annihilation dominates. The ATLAS experiment has now recorded a large number of top quark pairs, allowing this domain to be explored in detail. We present measurements of the spin corre- lation between top and anti-top quarks. The helicity fractions of W bosons from top quark decays are precisely predicted by the Standard Model and a deviation could reveal the presence of new physics. We also present a measurement of the W helicity fractions from top quark decays in ATLAS.
id cern-1490274
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
record_format invenio
spelling cern-14902742019-09-30T06:29:59Zhttp://cds.cern.ch/record/1490274engJuengst, MSpin Correlation and W Helicity in Top Events with ATLASDetectors and Experimental TechniquesIn 7 TeV proton-proton collisions at the LHC, pairs of top and anti-top quarks are expected to be mostly produced through gluon fusion, in contrast to production at the Tevatron, where quark annihilation dominates. The ATLAS experiment has now recorded a large number of top quark pairs, allowing this domain to be explored in detail. We present measurements of the spin corre- lation between top and anti-top quarks. The helicity fractions of W bosons from top quark decays are precisely predicted by the Standard Model and a deviation could reveal the presence of new physics. We also present a measurement of the W helicity fractions from top quark decays in ATLAS.ATL-PHYS-PROC-2012-237oai:cds.cern.ch:14902742012-10-27
spellingShingle Detectors and Experimental Techniques
Juengst, M
Spin Correlation and W Helicity in Top Events with ATLAS
title Spin Correlation and W Helicity in Top Events with ATLAS
title_full Spin Correlation and W Helicity in Top Events with ATLAS
title_fullStr Spin Correlation and W Helicity in Top Events with ATLAS
title_full_unstemmed Spin Correlation and W Helicity in Top Events with ATLAS
title_short Spin Correlation and W Helicity in Top Events with ATLAS
title_sort spin correlation and w helicity in top events with atlas
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1490274
work_keys_str_mv AT juengstm spincorrelationandwhelicityintopeventswithatlas

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