Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2000-07-20
Eur.Phys.J.C18:425-445,2001
Physics
High Energy Physics
High Energy Physics - Experiment
36 pages, 17 figures, submitted to Eur. Phys. J. C
Scientific paper
10.1007/s100520000544
Searches for the neutral Higgs bosons h0 and A0, are used to obtain limits on the Type II Two Higgs Doublet Model (2HDM(II)) with no CP-violation in the Higgs sector and no additional particles besides the five Higgs bosons. The analysis combines approximately 170 pb-1 of data collected with the OPAL detector at sqrt{s} ~ 189 GeV with previous runs at sqrt{s} ~ mZ and sqrt{s} ~ 183 GeV. The searches are sensitive to the h0, A0 -> qq, gg, tau+tau- and h0 -> A0A0 decay modes of the Higgs bosons. For the first time, the 2HDM(II) parameter space is explored in a detailed scan, and new flavour independent analyses are applied to examine regions in which the neutral Higgs bosons decay predominantly into light quarks or gluons. Model-independent limits are also given.
Abbiendi Giovanni
collaboration The OPAL
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