DELPHI
PUBLISHED
BEYOND SM
Search for Charged Higgs Bosons at LEP 2

A search for pair produced charged Higgs bosons has been performed in the high energy data collected by DELPHI at LEP with s=\sqrt{s} = 161, 172 and 183~GeV. The analysis uses the τντν\tau \nu \tau \nu, csˉτνc \bar s \tau \nu and csˉcˉsc \bar s \bar c s final states and a combination of event shape variables, di-jet masses and jet flavour tagging for the separation of a possible signal from the dominant W+^+W^- and QCD backgrounds. The number of selected events has been found to be compatible with the expected background. The lower excluded value of the H±^{\pm} mass obtained by varying the H±^{\pm} \rightarrow hadrons decay branching ratio has been found to be 56.3~GeV/c2c^2.

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