Study of ATLAS sensitivity to FCNC top decays

Details Study of ATLAS sensitivity to FCNC top decays Study of ATLAS sensitivity to FCNC top decays

2007-12-07

arxiv.org/abs/0712.1127v1

Eur.Phys.J.C52:999-1019,2007

Physics

High Energy Physics

High Energy Physics - Experiment

Scientific paper

10.1140/epjc/s10052-007-0434-0

The ATLAS experiment sensitivity to top quark Flavour Changing Neutral Current (FCNC) decays was studied at LHC using ttbar events. While one of the top quarks is expected to follow the dominant Standard Model decay t->bW, the other decays through a FCNC channel, i.e. t-> Z u(c), t-> gamma u(c) or t-> g u(c). Different types of analyses, applied to each FCNC decay mode, were compared. The FCNC branching ratio sensitivity (assuming a 5sigma signal significance) and 95% confidence level limits on the branching ratios (in the hypothesis of signal absence) were obtained.

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