DELPHI
PUBLISHED
BEYOND SM
Search for Charged Higgs Bosons in e+ee^{+} e^{-} Collisions at s\sqrt{s}=189-202 GeV

A search for pair-produced charged Higgs bosons was performed in the high energy data collected by the DELPHI detector at LEP II at centre-of-mass energies from 189~GeV to 202~GeV\@. The three different final states, τντν\tau \nu \tau \nu, csˉcˉsc \bar s \bar c s and csˉτνc \bar s \tau \nu were considered. New methods were applied to reject wrong hadronic jet pairings and for the tau identification, where a discriminator based on tau polarisation and polar angles was used. No excess of data compared to the expected Standard Model processes was observed and the existence of a charged Higgs boson with mass lower than 71.5 GeV/c2c^2 is excluded at the 95\% confidence level.

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