High Energy Theory Seminar
19 November 2010
Elizabeth Simmons (Michigan State University)
Models with an SU(3) × SU(3) color group have been proposed to explain
the FNAL observations of a positive enhancement of the top quark
forward-backward asymmetry relative to standard model
predictions. We show that this class of models cannot
explain the asymmetry while remaining consistent with other data,
including flavor-changing neutral currents in the b-quark sector.
Along the way, we examine specific models, phenomenological
approaches, and the implications of new LHC bounds on colored gauge
bosons. Finally, we consider the impact of extending the
color group to SU(3) × SU(3) × SU(3), as one might if embedding the
model in an extra-dimensional framework.
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