Search for charged Higgs bosons in decays of top quarks

We present a search for charged Higgs bosons in decays of top quarks, in the mass range $80<{m}_{{H}^{\ifmmode\pm\else\textpm\fi{}}}<155\text{ }\text{ }\mathrm{GeV}$, assuming the subsequent decay ${H}^{+}\ensuremath{\rightarrow}{\ensuremath{\tau}}^{+}{\ensuremath{\nu}}_{\ensuremath{\tau}}$ (and its charge conjugate). Using $0.9\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of $\mathrm{\text{lepton}}+\mathrm{\text{jets}}$ data collected with the D0 detector at the Fermilab Tevatron $p\overline{p}$ collider, operating at a center of mass energy $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$, we find no evidence for a ${H}^{\ifmmode\pm\else\textpm\fi{}}$ signal. Hence we exclude branching ratios $B(t\ensuremath{\rightarrow}{H}^{+}b)>0.24$ for ${m}_{{H}^{\ifmmode\pm\else\textpm\fi{}}}=80\text{ }\text{ }\mathrm{GeV}$ and $B(t\ensuremath{\rightarrow}{H}^{+}b)>0.19$ for ${m}_{{H}^{\ifmmode\pm\else\textpm\fi{}}}=155\text{ }\text{ }\mathrm{GeV}$ at the 95% C.L.

Search for charged Higgs bosons in decays of top quarks | Litlas