Like Sign Top Pair Production via $e^{+}{e}^{-}\to h^0{A}^0\to tt\bar{c}\bar{c}$

Abstract

We discuss the possibility and likelihood that one may observe {\it like sign} top quark pair production at the Linear Collider. In general two Higgs models, flavor changing couplings involving top quark could be quite sizable. Exotic neutral Higgs bosons may decay dominantly via $t\bar{c}$ or $\bar{t}c$ channels. At the linear collider, $e^{+}{e}^{-}\to h^0{A}^0$ or $H^0{A}^0$ production processes could lead to $b\bar{b}t\bar{c}$, $W^{+}{W}^{-}t\bar{c}$ or $tt\bar{c}\bar{c}$ (or $\bar{t}\bar{t}cc$) final states. These would mimic $T$-$\bar{T}$ mixing effect, except that $T$ mesons do not even form.

Comments: 10 pages, latex, no figures. Talk presented at LCWS95, September 1995, Morioka-Appi, Japan