Top-quark FCNC Productions at LHC in Topcolor-assisted Technicolor Model

Abstract

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 γ. 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.

5 pages, 4 figs

References in corpus (47)

• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Automatized One-Loop Calculations in 4 and D dimensions
• Topcolor Assisted Technicolor
• Top Quark Seesaw Theory of Electroweak Symmetry Breaking
• Natural Topcolor--Assisted Technicolor
• GIM Violation and New Dynamics of the Third Generation
• A new evaluation of the t->cH decay width in the standard model
• Top quark condensation
• Parton Distributions and the Strong Coupling Strength: CTEQ6AB PDFs
• 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
• SUSY-induced FCNC top-quark processes at the Large Hadron Collider
• A New Model of Topcolor-Assisted Technicolor
• Flavor-changing Top Quark Decays In R-Parity Violating SUSY
• Single-top-quark production at hadron colliders
• New Supersymmetric Contributions to $t->cV$
• Top-quark rare decay $t\to ch$ in R-parity-violating SUSY
• Flavour changing top decays in supersymmetric extensions of the standard model
• 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
• Model-independent Constraints on Topcolor from $R_b$
• $t\to cV$ via SUSY FCNC couplings in the unconstrained MSSM
• New Features in FormCalc 4
• The rare top quark decays $t\to cV$ in the topcolor-assisted technicolor model
• 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
• 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
• Reexamination of the Constraint on Topcolor-Assisted Technicolor Models from R_b
• Top flavour violating decays in general supersymmetric models
• 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 Production via Gluon Fusion at CERN LHC
• Single top quark production via SUSY-QCD FCNC couplings at the CERN LHC in the unconstrained MSSM
• Single top-quark production by direct supersymmetric flavor-changing neutral-current interactions at the LHC
• Rare top quark decay t --> u_1 \bar{u}_2 u_2 in the standard model
• The rare top decay $t\to cg$ in topcolor assisted technicolor models
• Flavor changing scalar couplings and $t\gamma (Z)$ production at hadron colliders

Cited by in corpus (29)

• A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector
• Top quark forward-backward asymmetry at the Tevatron: a comparative study in different new physics models
• Top quark forward-backward asymmetry, FCNC decays and like-sign pair production as a joint probe of new physics
• Probe Anomalous $tq\gamma$ couplings through Single Top Photoproduction at the LHC
• Calculations of three-nucleon reactions with N3LO chiral forces: achievements and challenges
• Zt, gamma t and t production at hadron colliders via strong flavour-changing neutral couplings
• R-parity violating effects in top quark FCNC productions at LHC
• Probing top quark FCNC couplings in the triple-top signal at the high energy LHC and future circular collider
• Next-to-leading order QCD corrections to the single top quark production via model-independent t-q-g flavor-changing neutral-current couplings at hadron colliders
• In search of an unbiased temperature estimator for statistically poor X-ray spectra
• Top quark FCNC decays and productions at LHC in littlest Higgs model with T-parity
• The flavor-changing single-top quark production in the littlest Higgs model with T parity at the LHC
• Top-Quark FCNC Decay t->cgg in Topcolor-assisted Technicolor Model
• Probing New Physics from Top Quark FCNC Processes at LHC: A Mini Review
• Next-to-leading order QCD corrections to the top quark associated with $\gamma$ production via model-independent flavor-changing neutral-current couplings at hadron colliders
• Top quark three-body decays in the R-parity violating MSSM
• Top quark decay t -> cb\bar{b} in topcolor-assisted technicolor models
• Probing the anomalous $tq\gamma$ couplings through single top production at the future lepton-hadron colliders
• Flavor-changing decays of the top quark in 5D warped models
• Probing the topcolor-assisted technicolor model via the single t-quark production at Hadron colliders
• Single top or bottom production associated with a scalar in γp collision as a probe of topcolor-assisted technicolor
• Single top production associated with a neutral scalar at LHC in topcolor-assisted technicolor
• PGB pair production at LHC and ILC as a probe of the topcolor-assisted technicolor models
• Probing the anomalous tqgamma couplings in photon-proton collisions
• The flavor-changing bottom-strange quark production in the littlest Higgs model with T parity at the ILC
• Searches for the technicolor signatures via gg --> W^{\pm}π_t^{\mp} at the Large Hadron Collider
• Associated production of a neutral top-Higgs with a heavy-quark pair in the γγcollisions at ILC
• Investigation of the FCNC couplings between the top quark and the photon in $\gamma \gamma$ and ${\gamma }^{\ast }{\gamma }^{\ast }$ collisions at the CLIC
• The charged top-pion production associated with the bottom quark pair as a probe of the topcolor-assisted technicolor model at the LHC