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Title
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Search for flavor-changing neutral currents in top-quark decays in collisions at = 8 TeV
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Author
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Institution/Organisation
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CMS Collaborat
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Abstract
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| A search for flavor-changing neutral currents in top-quark decays t -> Zq is performed in events produced from the decay chain (tt) over bar -> Zq + Wb, where both vector bosons decay leptonically, producing a final state with three leptons (electrons or muons). A data set collected with the CMS detector at the LHC is used, corresponding to an integrated luminosity of 19.7 fb(-1) of proton-proton collisions at a center-of-mass energy of 8 TeV. No excess is seen in the observed number of events relative to the standard model prediction; thus, no evidence for flavor-changing neutral currents in top-quark decays is found. A combination with a previous search at 7 TeV excludes a t. Zq branching fraction greater than 0.05% at the 95% confidence level. |
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Language
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English
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Source (journal)
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Physical review letters. - New York, N.Y., 1958, currens
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Publication
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New York, N.Y.
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American Physical Society
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2014
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ISSN
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0031-9007
[print]
1079-7114
[online]
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DOI
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10.1103/PHYSREVLETT.112.171802
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Volume/pages
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112
:17
(2014)
, 16 p.
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Article Reference
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171802
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ISI
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000336099500003
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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