Direct Search for Charged Higgs Bosons in Decays of Top Quarks

TL;DR

This paper reports a search for charged Higgs bosons in top quark decays at the Fermilab Tevatron, setting limits on their existence and properties based on collision data.

Contribution

First search for charged Higgs bosons in top decays at Tevatron, providing exclusion limits on parameter space with no evidence of signal.

Findings

No evidence of charged Higgs bosons was observed.

Excluded large regions of the (M_higgs, tan beta) parameter space.

Set upper limits on the branching fraction of t->H b decays.

Abstract

We present a search for charged Higgs bosons in decays of pair-produced top quarks in pbar p collisions at sqrt(s) = 1.8 TeV using 62.2 pb^-1 of data recorded by the D0 detector at the Fermilab Tevatron collider. No evidence is found for signal, and we exclude at 95% confidence most regions of the (M higgs, tan beta) parameter space where the decay t->H b has a branching fraction greater than 0.36 and B(H -> tau nu) is large.