Search for flavor changing neutral currents in decays of top quarks

Details Search for flavor changing neutral currents in decays of top quarks Search for flavor changing neutral currents in decays of top quarks

2011-03-23

arxiv.org/abs/1103.4574v2

Physics Letters B 701 (2011), pp. 313-320

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 5 figures, Submitted to Physics Letters B. Paper updated Sept. 7, 2011 to include PLB referee's comments and suggest

Scientific paper

We present a search for flavor changing neutral currents in decays of top quarks. The analysis is based on a search for ttbar -> l'null + jets (l, l' = e, mu) final states using 4.1 fb^-1 of integrated luminosity of ppbar collisions at sqrt(s) = 1.96 TeV. We extract limits on the branching ratio B(t -> Zq) (q = u, c quarks), assuming anomalous tuZ or tcZ couplings. We do not observe any sign of such anomalous coupling and set a limit of B < 3.2% at 95% C.L.

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