Search for charged Higgs bosons in e+e- collisions at energies up to sqrt(s) = 189GeV

Details Search for charged Higgs bosons in e+e- collisions at energies up to sqrt(s) = 189GeV Search for charged Higgs bosons in e+e- collisions at energies up to sqrt(s) = 189GeV

2000-08-03

arxiv.org/abs/hep-ex/0008005v1

Phys.Lett.B487:253-263,2000

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 4 figures, ICHEP2000 Osaka

Scientific paper

10.1016/S0370-2693(00)00822-4

The data collected at centre-of-mass energies of 188.6 GeV by ALEPH at LEP, corresponding to an integrated luminosity of 176.2 pb-1, are analysed in a search for pair-produced charged Higgs bosons H+/-. Three analyses are employed to select the taunutaunu, taunucs and cscs final states. No evidence for a signal is found. Upper limits are set on the production cross section as a function of the branching fraction BR(H+ to tau nu) and of the mass M(H+), assuming that the sum of the branching ratios is equal to one. In the framework of a two-Higgs-doublet model, charged Higgs bosons with masses below 65.4 GeV/c2 are excluded at 95% confidence level independently of the decay mode.

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