Search for top quark decays via Higgs-boson-mediated flavor changing neutral currents in pp collisions at~$\sqrt{s}$~=~8~TeV
A search for top quark decays via Higgs-boson-mediated flavor changing neutral currents ${\rm pp \rightarrow t\bar{t} \rightarrow \rm Hc + Wb}$ in events containing a trilepton or same-sign dilepton is presented. The search is performed with a data sample with an integrated luminosity of 19.7 fb$^{-...
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Publicado: |
2015
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Acceso en línea: | http://cds.cern.ch/record/2001934 |
_version_ | 1780946034913968128 |
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author | CMS Collaboration |
author_facet | CMS Collaboration |
author_sort | CMS Collaboration |
collection | CERN |
description | A search for top quark decays via Higgs-boson-mediated flavor changing
neutral currents ${\rm pp \rightarrow t\bar{t} \rightarrow \rm Hc + Wb}$ in events
containing a trilepton or same-sign dilepton is presented. The search
is performed with a data sample with an integrated luminosity of
19.7 fb$^{-1}$ of pp collisions at $\sqrt{s} = 8 \rm TeV$ collected with
the CMS detector at the CERN LHC. The observed number of events agrees
with the SM prediction, and no evidence for top quark decays via
Higgs-boson-mediated flavor changing neutral currents are found. The
measured 95\% confidence level observed and expected upper limits on the
$\rm t \to Hc$ branching fraction are 0.93\% and 0.89\% respectively.
This corresponds to an observed upper limit on top-charm flavor
violating Higgs Yukawa coupling of
$\sqrt{\left|\lambda_{tc}^{H}\right|^{2} +
\left|\lambda_{ct}^{H}\right|^{2}} < 0.18$. |
id | cern-2001934 |
institution | Organización Europea para la Investigación Nuclear |
publishDate | 2015 |
record_format | invenio |
spelling | cern-20019342019-09-30T06:29:59Zhttp://cds.cern.ch/record/2001934CMS Collaboration Search for top quark decays via Higgs-boson-mediated flavor changing neutral currents in pp collisions at~$\sqrt{s}$~=~8~TeVParticle Physics - ExperimentA search for top quark decays via Higgs-boson-mediated flavor changing neutral currents ${\rm pp \rightarrow t\bar{t} \rightarrow \rm Hc + Wb}$ in events containing a trilepton or same-sign dilepton is presented. The search is performed with a data sample with an integrated luminosity of 19.7 fb$^{-1}$ of pp collisions at $\sqrt{s} = 8 \rm TeV$ collected with the CMS detector at the CERN LHC. The observed number of events agrees with the SM prediction, and no evidence for top quark decays via Higgs-boson-mediated flavor changing neutral currents are found. The measured 95\% confidence level observed and expected upper limits on the $\rm t \to Hc$ branching fraction are 0.93\% and 0.89\% respectively. This corresponds to an observed upper limit on top-charm flavor violating Higgs Yukawa coupling of $\sqrt{\left|\lambda_{tc}^{H}\right|^{2} + \left|\lambda_{ct}^{H}\right|^{2}} < 0.18$.CMS-PAS-TOP-13-017oai:cds.cern.ch:20019342015 |
spellingShingle | Particle Physics - Experiment CMS Collaboration Search for top quark decays via Higgs-boson-mediated flavor changing neutral currents in pp collisions at~$\sqrt{s}$~=~8~TeV |
title | Search for top quark decays via Higgs-boson-mediated flavor changing
neutral currents in pp collisions at~$\sqrt{s}$~=~8~TeV |
title_full | Search for top quark decays via Higgs-boson-mediated flavor changing
neutral currents in pp collisions at~$\sqrt{s}$~=~8~TeV |
title_fullStr | Search for top quark decays via Higgs-boson-mediated flavor changing
neutral currents in pp collisions at~$\sqrt{s}$~=~8~TeV |
title_full_unstemmed | Search for top quark decays via Higgs-boson-mediated flavor changing
neutral currents in pp collisions at~$\sqrt{s}$~=~8~TeV |
title_short | Search for top quark decays via Higgs-boson-mediated flavor changing
neutral currents in pp collisions at~$\sqrt{s}$~=~8~TeV |
title_sort | search for top quark decays via higgs-boson-mediated flavor changing
neutral currents in pp collisions at~$\sqrt{s}$~=~8~tev |
topic | Particle Physics - Experiment |
url | http://cds.cern.ch/record/2001934 |
work_keys_str_mv | AT cmscollaboration searchfortopquarkdecaysviahiggsbosonmediatedflavorchangingneutralcurrentsinppcollisionsatsqrts8tev |