Search for Charged Higgs Boson Decays of the Top Quark using Hadronic Decays of the Tau Lepton

This Letter describes a direct search for charged Higgs boson production in $p\overline{p}$ collisions at $\sqrt{s}=1.8\mathrm{}\mathrm{TeV}$ recorded by the Collider Detector at Fermilab. Two-Higgs-double extensions to the standard model predict the existence of charged Higgs bosons $\left(H^{\pm }\right)$. In such models, the branching fraction for top quarks $B(t\to H^{+}b\to {\tau }^{+}\nu b)$ can be large. This search uses the hadronic decays of the tau lepton in this channel to significantly extend previous limits on $H^{\pm }$ production.