Top-Quark Decay Via the Anomalous Coupling $\bar{t}c{\hat{I}}^3$ at Hadron Colliders

Abstract

We determine the constraints on the anomalous top-quark coupling associated with the flavor-changing neutral current vertex $\bar{t}c{\hat{I}}^3$ from the limits on the $b$-quark rare decay $b\to s{\hat{I}}^3$ and non-standard top-quark decays. Based on these constraints, we discuss the experimental observability of the rare decay mode $t\to c{\hat{I}}^3$, both at the Fermilab Tevatron with a luminosity-upgrade and at the LHC.

19 pages, 8 figures, RevTeX, postscript files available via anonymous ftp: ftp://ucdhep.ucdavis.edu/han/top/ (get paper_top.ps and fig*.ps)