Compact Muon Solenoid
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| CMS-TOP-12-037 ; CERN-PH-EP-2013-208 | ||
| Search for flavor-changing neutral currents in top-quark decays $ \mathrm{ t \to Zq } $ in pp collisions at $\sqrt{s}$ = 8 TeV | ||
| CMS Collaboration | ||
| 15 December 2013 | ||
| Phys. Rev. Lett. 112 (2014) 171802 | ||
| Abstract: A search for flavor-changing neutral currents in top-quark decays $ \mathrm{ t \to Zq } $ is performed in events produced from the decay chain $ \mathrm{ t\bar{t} \to Zq+Wb } $, where both vector bosons decay leptonically, producing a final state with three leptons (electrons or muons). A dataset collected with the CMS detector at the LHC is used, corresponding to an integrated luminosity of 19.7 inverse femtobarns 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 $ \mathrm{ t \to Zq } $ branching fraction greater than 0.05% at the 95% confidence level. | ||
| Links: e-print arXiv:1312.4194 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; Public twiki page ; CADI line (restricted) ; | ||
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Compact Muon Solenoid LHC, CERN |
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