Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-03-29
Phys.Rev.D76:014004,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, 4 figs
Scientific paper
10.1103/PhysRevD.76.014004
We evaluate the top-quark FCNC productions induced by the topcolor assisted technicolor (TC2) model at the LHC. These productions proceed respectively through the parton-level processes g g -> t c_bar, c g->t, c g -> t g, c g -> t Z and c g -> t \gamma. We show the dependence of the production rates on the relevant TC2 parameters and compare the results with the predictions in the minimal supersymmetric model. We find that for each channel the TC2 model predicts a much larger production rate than the supersymmetric model. All these rare productions in the TC2 model can be enhanced above the 3-sigma sensitivity of the LHC. Since in the minimal supersymmetric model only c g -> t is slightly larger than the corresponding LHC sensitivity, the observation of these processes will favor the TC2 model over the supersymmetric model. In case of unobservation, the LHC can set meaningful constraints on the TC2 parameters.
Cao Junjie
Liu Guoli
Yang Jin Min
Zhang Huanjun
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