Probing New Physics from Top-charm Associated Productions at Linear Colliders

Abstract

The top-charm associated productions via $e^{+}{e}^{-}$, $e^{-}\gamma$ and $\gamma \gamma$ collisions at linear colliders, which are extremely suppressed in the Standard Model (SM), could be significantly enhanced in some extensions of the SM. In this article we calculate the full contribution of the topcolor-assisted technicolor (TC2) to these productions and then compare the results with the existing predictions of the SM, the general two-Higgs-doublet model and the Minimal Supersymmetric Model. We find that the TC2 model predicts much larger production rates than other models and the largest-rate channel is $\gamma \gamma \to t\bar{c}$, which exceeds 10 fb for a large part of the parameter space. From the analysis of the observability of such productions at the future linear colliders, we find that the predictions of the TC2 model can reach the observable level for a large part of the parameter space while the predictions of other models are hardly accessible.

discussions added (version in Eur. Phys. J. C)

References in corpus (6)

• SUSY-Induced Top Quark FCNC Processes at Linear Colliders
• Probing Topcolor-Assisted Technicolor from Top-Charm Associated Production at LHC
• Top quark associated production of topcolor pions at hadron colliders
• The process $e^{+}{e}^{-}\to \bar{t}c$ in topcolor-assisted technicolor models
• Detecting top-Higgs at high energy $e^{+}{e}^{-}$ colliders
• Signatures of the neutral top-pion in $e\gamma$ collisions

Cited by in corpus (28)

• SUSY-induced FCNC top-quark processes at the Large Hadron Collider
• Top quark forward-backward asymmetry at the Tevatron: a comparative study in different new physics models
• Single Top-Quark Production in Flavor-Changing Z' Models
• Flavor Changing Neutral Currents involving Heavy Quarks with Four Generations
• Probe Anomalous $tq\gamma$ couplings through Single Top Photoproduction at the LHC
• Constraints on top quark FCNC from electroweak precision measurements
• Top-quark FCNC Productions at LHC in Topcolor-assisted Technicolor Model
• R-parity violating effects in top quark FCNC productions at LHC
• Constraints on flavor-changing neutral-current $Htq$ couplings from the signal of $tH$ associated production with QCD next-to-leading order accuracy at the LHC
• Higgs mediated flavor violating top quark decays t --> u_i H, u_i gamma, u_i gamma gamma, and the process gamma gamma --> t c in effective theories
• Top quark FCNC decays and productions at LHC in littlest Higgs model with T-parity
• In search of an unbiased temperature estimator for statistically poor X-ray spectra
• 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
• Lepton flavour violating processes at the International Linear Collider
• Top quark three-body decays in the R-parity violating MSSM
• The flavor-changing top-charm quark production in the littlest Higgs model with T parity at the ILC
• Study of the single neutral top-pion production process at $\gamma \gamma$ collider
• Higgs boson production in photon-photon collision at ILC: a comparative study in different little Higgs models
• Top quark decay t -> cb\bar{b} in topcolor-assisted technicolor models
• Single top or bottom production associated with a scalar in γp collision as a probe of topcolor-assisted technicolor
• Probing Lepton Flavor Violation Signal via γγ\to l_i\barl_j in the Left-Right Twin Higgs Model at the ILC
• Single top production associated with a neutral scalar at LHC in topcolor-assisted technicolor
• Technicolor corrections to b\bar{b} -> W^{\pm}π^{\mp}_t at the CERN Large Hadron Collider
• The flavor-changing bottom-strange quark production in the littlest Higgs model with T parity at the ILC
• Single production of the gauge boson $W$ via polarized $e^{-}\gamma$ collisions in the littlest Higgs model
• The flavor-changing top-charm associated productions at ILC in littlest Higgs model with T parity
• The charged top-pion production associated with the bottom quark pair as a probe of the topcolor-assisted technicolor model at the LHC