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 161, 172 and 183~GeV. The analysis uses the , and 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 WW 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 mass obtained by varying the H hadrons decay branching ratio has been found to be 56.3~GeV/.