Like Sign Top Quark Pair Production at Linear Colliders

Abstract

In the general two Higgs doublet model with flavor changing neutral Higgs couplings, neutral Higgs bosons may decay dominantly via $t\bar{c}$ or $\bar{t}c$ final states. At the linear collider, $e^{+}{e}^{-}\to h^0{A}^0$ or $H^0{A}^0$ production processes may result in $b\bar{b}t\bar{c}$, $W^{+}{W}^{-}t\bar{c}$ or $tt\bar{c}\bar{c}$ (or $\bar{t}\bar{t}cc$) final states. The process $\gamma \gamma \to h^0,A^0\to t\bar{c}$ is also promising, but $e^{+}{e}^{-}\to (h^0,H^0)Z^0\to t\bar{c}{Z}^0$ is relatively suppressed. The possibility of observing like sign lepton pairs, usually the hallmark for neutral meson mixing, is quite interesting since $T^0$ mesons do not even form.

13 pages, REVTEX, 2 figures (not included)

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• Implications of a W^+W^- (ZZ) - Higgs - t c-bar$ Interaction for e^+e^- -> t c-bar ν_e ν_e-bar, t c-bar e^+ e^-, t c-bar Z and for t -> cW^+W^-, cZZ in a Two Higgs Doublet Model
• Probing Flavor Changing Neutral Higgs Couplings at LHC
• Flavor Changing Neutral Higgs Couplings and Top-Charm Production at Next Linear Collider
• One-loop renormalization group equations of the general framework with two Higgs doublets
• The process $e^{+}{e}^{-}\to \bar{t}c$ in topcolor-assisted technicolor models
• Probing flavor changing interactions in photon-photon collisions
• Search for t->ch at e+e- Linear Colliders
• Two Higgs Doublets Models and CP Violating Higgs Exchange in e+ e- -> t bar-t Z
• The flavor-changing top-charm quark production in the littlest Higgs model with T parity at the ILC
• Same-sign top pair production in an extra-dimension model of flavor at the CERN Large Hadron Collider
• Probing flavor changing interactions in hadron collisions
• CP Violating Asymmetries in the Flavor Changing Single Top Quark Production
• The flavor-changing top-charm associated productions at ILC in littlest Higgs model with T parity
• Searching for Charged Higgs Bosons via $e^{+}{e}^{-}\to H^{+}{H}^{-}\to c\bar{b}\bar{c}b$ at Linear Colliders