Search For Charged Higgs Decays of the Top Quark Using Hadronic Decays of the Tau Lepton

TL;DR

This paper reports a search for charged Higgs bosons produced in top quark decays, using hadronic tau decays in proton-antiproton collisions, to improve existing limits on such particles predicted by two-Higgs-doublet models.

Contribution

It introduces a novel search method focusing on hadronic tau decays to set new limits on charged Higgs production in top quark decays.

Findings

Extended limits on charged Higgs production in top decays.

Utilized hadronic tau decay channel for increased sensitivity.

Provided constraints on two-Higgs-doublet model parameters.

Abstract

This Letter describes a direct search for charged Higgs boson production in proton-antiproton collisions at sqrt(s)=1.8 TeV recorded by the Collider Detector at Fermilab. Two-Higgs-doublet extensions to the standard model predict the existence of charged Higgs bosons. In such models, the branching fraction for top quarks B(t --> H b --> 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 charged Higgs production.