Rare decays of the top quark in the minimal supersymmetric model

Abstract

The decays $t\ensuremath{\rightarrow}\mathrm{cV}$ ($V=\ensuremath{\gamma},g or Z$) induced through loop processes are calculated in the minimal supersymmetric model. We find that these new contributions can enhance the standard model branching fractions by as much as 3-4 orders of magnitude, i.e., $B(t\ensuremath{\rightarrow}cg)\ensuremath{\sim}{10}^{\ensuremath{-}6}$, $B(t\ensuremath{\rightarrow}cZ)\ensuremath{\sim}{10}^{\ensuremath{-}8}$, and $B(t\ensuremath{\rightarrow}c\ensuremath{\gamma})\ensuremath{\sim}{10}^{\ensuremath{-}8}$, for favorable values of the parameters.