Probing new physics from top quark FCNC processes at linear colliders : a mini review

Abstract

We briefly review the studies on the top quark FCNC processes at a next-generation linear collider. Such processes, including various FCNC top quark rare decays and top-charm associated productions, are extremely suppressed in the standard model (SM) but could be significantly enhanced in some extensions. We compared the predictions from different typical new physics models: the SM, the minimal supersymmetric model (MSSM), the general two-higgs-doublet model (2HDM) and the topcolor-assisted technicolor (TC2) model. Our conclusion is: (1) While all the new physics models can enhance the rates by several orders relative to the SM predictions, the TC2 model predicts much larger rates than other models; (2) The optimal channel for probing the top quark FCNC is the top-charm associated production in γ-γcollision, which occurs at a much higher rate than e^+ e^- or e^- γcollision and can reach the detectable level for a large part of the parameter space.

12 pages, 12 figs, talk given at APPI2004, Iweta, Japan

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• The process $e^{+}{e}^{-}\to \bar{t}c$ in topcolor-assisted technicolor models
• Detecting top-Higgs at high energy $e^{+}{e}^{-}$ colliders
• CP Violating Asymmetries in the Flavor Changing Single Top Quark Production

Cited by in corpus (33)

• SUSY-induced FCNC top-quark processes at the Large Hadron Collider
• Deciphering top flavor violation at the LHC with B factories
• New Physics effects in the flavor-changing neutral couplings of the Top quark
• Experimental Constraints on Scharm-Stop Flavor Mixing and Implications in Top-quark FCNC Processes
• Constraints on top quark FCNC from electroweak precision measurements
• Top-quark FCNC Productions at LHC in Topcolor-assisted Technicolor Model
• Rare Decay of the Top t->c l lbar and Single Top Production at International Linear Collider
• R-parity violating effects in top quark FCNC productions at LHC
• Enhancing $thj$ Production from Top-Higgs FCNC Couplings
• 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
• 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
• Improved sensitivity on the electromagnetic dipole moments of the top quark in $\gamma \gamma$, $\gamma {\gamma }^{\ast }$ and ${\gamma }^{\ast }{\gamma }^{\ast }$ collisions at the CLIC
• Searches for top-Higgs FCNC couplings via the Whj signal with $h\to \gamma \gamma$ at the LHC
• Top-Quark FCNC Decay t->cgg in Topcolor-assisted Technicolor Model
• Probing model-independent limits on $W^{+}{W}^{-}\gamma$ triple gauge boson vertex at the LHeC and the FCC-he
• Bounds on the non-standard $W^{+}{W}^{-}\gamma$ couplings at the LHeC and the FCC-he
• Search for anomalous quartic $ZZ\gamma \gamma$ couplings in photon-photon collisions
• Top quark three-body decays in the R-parity violating MSSM
• Searches for the FCNC couplings from top-Higgs associated production signal with $h\to \gamma \gamma$ at the LHC
• Top quark anomalous FCNC production via $tqg$ couplings at FCC-hh
• FCNC Top Quark Decays in Extra Dimensions
• Probing anomalous $tq\gamma$ and $tqg$ couplings via single top production in association with photon at FCC-hh
• Higgs Quark Flavor Violation: Simplified Models and Status of General Two-Higgs-Doublet Model
• Top quark rare three-body decays in the littlest Higgs model with T-parity
• Sensitivity physics expected to the measurement of the quartic $WW\gamma \gamma$ couplings at the LHeC and the FCC-he
• 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 anomalous top-Higgs couplings at the HL-LHC via $H\to W{W}^{\ast }$ decay channels
• Single top production associated with a neutral scalar at LHC in topcolor-assisted technicolor
• The flavor-changing bottom-strange quark production in the littlest Higgs model with T parity at the ILC
• The single t-quark productions via the flavor-changing processes in the topcolor-assisted technicolor model at the hadron colliders
• Exploring Anomalous Flavor-Changing Neutral tqh Transitions at Future Muon Colliders: Insights from ${\mu }^{+}{\mu }^{-}\to t\bar{q}h$ Interactions