Top quark production offers the unique opportunity to search for
a charged Higgs boson (H+/-), as the contribution from t --> H+b --> tau+
nu b can be large in extensions of the Standard Model. We use results from
a search for top quark pair production by the Collider Detector at Fermilab
(CDF) in the e tau + missing E(t) + jets and mu tau + missing E(t) + jets
signatures to set an upper limit on the branching ratio of Beta(t --> H+b)
in 106 pb-1 of data. The upper limit is in the range 0.5 to 0.6 at 95%
C.L. for H+ masses in the range 60 to 160 GeV, assuming the branching ratio
for H+ --> tau nu is 100%. The tau lepton is detected through its 1-prong
and 3-prong hadronic decays.
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Updated: Thursday, 2001 January 25 07:47:58 CST automatically from input from Carol Picciolo