Search for flavor-changing neutral currents in $t\rightarrow cH$, with $H\to\gamma\gamma$, and limit on the tcH coupling

A search for flavour changing neutral currents in top quark decays $t\rightarrow cH$, with $H\to\gamma\gamma$ at $m_{H} = 126.8$ GeV, using 20 fb$^{-1}$ of $\sqrt{s}$ = 8 TeV and 5 fb$^{-1}$ of $\sqrt{s}$ = 7 TeV data collected by the ATLAS experiment at the LHC, is reported. The analysis is based o...

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Detalles Bibliográficos
Autor principal: The ATLAS collaboration
Lenguaje:eng
Publicado: 2013
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/1565103
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author The ATLAS collaboration
author_facet The ATLAS collaboration
author_sort The ATLAS collaboration
collection CERN
description A search for flavour changing neutral currents in top quark decays $t\rightarrow cH$, with $H\to\gamma\gamma$ at $m_{H} = 126.8$ GeV, using 20 fb$^{-1}$ of $\sqrt{s}$ = 8 TeV and 5 fb$^{-1}$ of $\sqrt{s}$ = 7 TeV data collected by the ATLAS experiment at the LHC, is reported. The analysis is based on $t\bar{t}$ events in which one top decays to $cH$, the other decays to $bW$, and both the hadronic and the leptonic decay modes of the $W$ are used and combined. No significant signal is observed and an upper limit on the branching ratio of 0.83% (0.53% expected) at the 95% confidence level is set. The corresponding limit on the $tcH$ coupling is 0.17 (0.14 expected).
id cern-1565103
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
record_format invenio
spelling cern-15651032021-04-18T19:38:04Zhttp://cds.cern.ch/record/1565103engThe ATLAS collaborationSearch for flavor-changing neutral currents in $t\rightarrow cH$, with $H\to\gamma\gamma$, and limit on the tcH couplingDetectors and Experimental TechniquesA search for flavour changing neutral currents in top quark decays $t\rightarrow cH$, with $H\to\gamma\gamma$ at $m_{H} = 126.8$ GeV, using 20 fb$^{-1}$ of $\sqrt{s}$ = 8 TeV and 5 fb$^{-1}$ of $\sqrt{s}$ = 7 TeV data collected by the ATLAS experiment at the LHC, is reported. The analysis is based on $t\bar{t}$ events in which one top decays to $cH$, the other decays to $bW$, and both the hadronic and the leptonic decay modes of the $W$ are used and combined. No significant signal is observed and an upper limit on the branching ratio of 0.83% (0.53% expected) at the 95% confidence level is set. The corresponding limit on the $tcH$ coupling is 0.17 (0.14 expected).ATLAS-CONF-2013-081oai:cds.cern.ch:15651032013-07-29
spellingShingle Detectors and Experimental Techniques
The ATLAS collaboration
Search for flavor-changing neutral currents in $t\rightarrow cH$, with $H\to\gamma\gamma$, and limit on the tcH coupling
title Search for flavor-changing neutral currents in $t\rightarrow cH$, with $H\to\gamma\gamma$, and limit on the tcH coupling
title_full Search for flavor-changing neutral currents in $t\rightarrow cH$, with $H\to\gamma\gamma$, and limit on the tcH coupling
title_fullStr Search for flavor-changing neutral currents in $t\rightarrow cH$, with $H\to\gamma\gamma$, and limit on the tcH coupling
title_full_unstemmed Search for flavor-changing neutral currents in $t\rightarrow cH$, with $H\to\gamma\gamma$, and limit on the tcH coupling
title_short Search for flavor-changing neutral currents in $t\rightarrow cH$, with $H\to\gamma\gamma$, and limit on the tcH coupling
title_sort search for flavor-changing neutral currents in $t\rightarrow ch$, with $h\to\gamma\gamma$, and limit on the tch coupling
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1565103
work_keys_str_mv AT theatlascollaboration searchforflavorchangingneutralcurrentsintrightarrowchwithhtogammagammaandlimitonthetchcoupling

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