Search for Charged Higgs Bosons at LEP in General Two Higgs Doublet Models

Details Search for Charged Higgs Bosons at LEP in General Two Higgs Doublet Models Search for Charged Higgs Bosons at LEP in General Two Higgs Doublet Models

2004-04-09

arxiv.org/abs/hep-ex/0404012v1

Eur.Phys.J.C34:399-418,2004

Physics

High Energy Physics

High Energy Physics - Experiment

42 pages, 19 figures, Accepted by Eur. Phys. J. C

Scientific paper

10.1140/epjc/s2004-01732-6

A search for pair-produced charged Higgs bosons was performed in the data collected by the DELPHI detector at LEP II at centre-of-mass energies from 189 GeV to 209 GeV. Five different final states, tau+ nu_tau tau- anti-nu_tau, c sbar cbar s, c sbar tau- anti-nu_tau, W* A W* A and W* A tau- anti-nu_tau were considered, accounting for the major expected decays in type I and type II Two Higgs Doublet Models. No significant excess of data compared to the expected Standard Model processes was observed. The existence of a charged Higgs boson with mass lower than 76.7 GeV/c^2 (type I) or 74.4 GeV/c^2 (type II) is excluded at the 95% confidence level, for a wide range of the model parameters. Model independent cross-section limits have also been calculated.

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