Top-Quark FCNC Decay t->cgg in Topcolor-assisted Technicolor Model

Abstract

The topcolor-assisted technicolor (TC2) model predicts several pseudo-scalars called top-pions and at loop level they can induce the FCNC top quark decay t->cgg which is extremely suppressed in the Standard Model (SM). We find that in the allowed parameter space the TC2 model can greatly enhance such a FCNC decay and push the branching ratio up to 10^{-3}, which is much larger than the predictions in the SM (10^{-9}) and in the minimal supersymmetric model (10^{-4}). We also compare the result with the two-body FCNC decay t-> cg and find that the branching ratio of t-> cgg is slightly larger than t-> cg. Such enhanced FCNC top quark decays may serve as a good probe of TC2 model at the future top quark factory.

arXiv comment11 pages, 4 figures

References in corpus (51)

• Topcolor Assisted Technicolor
• Single Top Production as a Window to Physics Beyond the Standard Model
• Top Production: Sensitivity to New Physics
• Natural Topcolor--Assisted Technicolor
• A new evaluation of the t->cH decay width in the standard model
• Top quark condensation
• FCNC top quark decay in the MSSM: a door to SUSY physics in high luminosity colliders?
• New Method for Detecting Charged (Pseudo-)Scalars at Colliders
• A New Model of Topcolor-Assisted Technicolor
• SUSY-induced FCNC top-quark processes at the Large Hadron Collider
• Flavor-changing Top Quark Decays In R-Parity Violating SUSY
• New Supersymmetric Contributions to $t->cV$
• Top-quark rare decay $t\to ch$ in R-parity-violating SUSY
• Dimension-six CP-conserving operators of the third-family quarks and their effects on collider observables
• Review of Top Quark Physics
• Flavour changing top decays in supersymmetric extensions of the standard model
• Top-Quark Decay Via Flavor-Changing Neutral Currents at Hadron Colliders
• Probing top flavour-changing neutral scalar couplings at the CERN LHC
• Scalars from Top-condensation Models at Hadron Colliders
• Flavour changing top quark decay within the minimal supersymmetric standard model
• Single Top Quark Production via FCNC Couplings at Hadron Colliders
• Direct Top Quark Production at Hadron Colliders as a Probe of New Physics
• $t\to cV$ via SUSY FCNC couplings in the unconstrained MSSM
• Searching for $t\to cg$ at the Fermilab Tevatron
• Top-Charm Strong Flavor-Changing Neutral Currents at the Tevatron
• Top-Quark Decay Via the Anomalous Coupling $\bar{t}c\gamma$ at Hadron Colliders
• The rare top quark decays $t\to cV$ in the topcolor-assisted technicolor model
• Probing anomalous top quark interactions at the Fermilab Tevatron Collider
• SUSY-Induced Top Quark FCNC Processes at Linear Colliders
• New Physics effects in the flavor-changing neutral couplings of the Top quark
• Probing Topcolor-Assisted Technicolor from Top-Charm Associated Production at LHC
• Anomalous t-c-g coupling: The connection between single top production and top decay
• Experimental Constraints on Scharm-Stop Flavor Mixing and Implications in Top-quark FCNC Processes
• Multilepton production via top flavour-changing neutral couplings at the CERN LHC
• Z -> b\bar{b} Versus Dynamical Electroweak Symmetry Breaking involving the Top Quark
• Top flavour violating decays in general supersymmetric models
• Reexamination of the Constraint on Topcolor-Assisted Technicolor Models from R_b
• Top-quark FCNC Productions at LHC in Topcolor-assisted Technicolor Model
• Probing New Physics from Top-charm Associated Productions at Linear Colliders
• Rare Decay of the Top t->c l lbar and Single Top Production at International Linear Collider
• Probing new physics from top quark FCNC processes at linear colliders : a mini review
• Probing Topcolor-Assisted Technicolor from Like-sign Top Pair Production at LHC
• Neutral top-pion and top-charm production in high energy $e^{+}{e}^{-}$ collisions
• FCNC production of same sign Top quark pairs at the LHC
• Single top-quark production by direct supersymmetric flavor-changing neutral-current interactions at the LHC
• Single top quark production via SUSY-QCD FCNC couplings at the CERN LHC in the unconstrained MSSM
• Single Top Production via Gluon Fusion at CERN LHC
• Rare Decay of the Top t -> cgg in the Standard Model
• Rare top quark decay t --> u_1 \bar{u}_2 u_2 in the standard model
• Single top-quark production by strong and electroweak supersymmetric flavor-changing interactions at the LHC
• The rare top decay $t\to cg$ in topcolor assisted technicolor models

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• Probing the anomalous $tq\gamma$ couplings through single top production at the future lepton-hadron colliders
• Top quark decay t -> cb\bar{b} in topcolor-assisted technicolor models
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• Single top or bottom production associated with a scalar in γp collision as a probe of topcolor-assisted technicolor
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• Investigation of the FCNC couplings between the top quark and the photon in $\gamma \gamma$ and ${\gamma }^{\ast }{\gamma }^{\ast }$ collisions at the CLIC