Article ; Online: Search for flavor-changing neutral currents in top-quark decays t → Zq in pp collisions at sqrt[s] = 8 TeV.
2014 Volume 112, Issue 17, Page(s) 171802
Abstract: A search for flavor-changing neutral currents in top-quark decays t → Zq is performed in events ... A combination with a previous search at 7 TeV excludes a t → Zq branching fraction greater than 0.05% at the 95 ...
Abstract | A search for flavor-changing neutral currents in top-quark decays t → Zq is performed in events produced from the decay chain tt → 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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MeSH term(s) | Models, Theoretical ; Neutrons ; Nuclear Physics/methods ; Thermodynamics |
Language | English |
Publishing date | 2014-05-02 |
Publishing country | United States |
Document type | Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S. |
ZDB-ID | 208853-8 |
ISSN | 1079-7114 ; 0031-9007 |
ISSN (online) | 1079-7114 |
ISSN | 0031-9007 |
DOI | 10.1103/PhysRevLett.112.171802 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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