Search for Charged Higgs Bosons in Decays of Top Quark Pairs

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21 June 1999

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 82 (25) , 4975-4980
https://doi.org/10.1103/physrevlett.82.4975

Abstract

We present a search for charged Higgs bosons in decays of pair-produced top quarks using

109.2 \pm 5.8 {pb}^{- 1}

of data recorded from

p \bar{p}

collisions at

\sqrt{s} = 1.8 TeV

by the D0 detector during 1992–1996 at the Fermilab Tevatron. No evidence is found for charged Higgs production, and most parts of the

[M_{H^{+}}, \tan β]

parameter space where the decay

t \to H^{+} b

has a branching fraction close to or larger than that for

t \to W^{+} b

are excluded at

95 %

confidence level. Assuming

m_{t} = 175 GeV

and

σ (p \bar{p} \to t \bar{t}) = 5.5 pb

, for

M_{H^{+}} = 60 GeV

, we exclude

\tan β < 0.97

and

\tan β > 40.9

.

Keywords

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