Study of ATLAS sensitivity to FCNC top decays

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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...

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Detalles Bibliográficos
Autores principales: Carvalho, J., Castro, Nuno Filipe, Chikovani, L., Djobava, T., Dodd, J., McGrath, S., Onofre, A., Parsons, J., Veloso, F.
Lenguaje:eng
Publicado: 2007
Materias:
Detectors and Experimental Techniques
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1140/epjc/s10052-007-0434-0
http://cds.cern.ch/record/1074014
Descripción
Sumario: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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