Search for charged Higgs bosons in $e^+ e^-$ collisions at energies up to $\sqrt{s}$ = 189 GeV

Abstract : 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.
Document type :
Conference papers

http://hal.in2p3.fr/in2p3-00010861
Contributor : Magali Damoiseaux <>
Submitted on : Friday, September 15, 2000 - 1:56:40 PM
Last modification on : Monday, March 29, 2021 - 3:22:09 PM
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• HAL Id : in2p3-00010861, version 1

Citation

R. Barate, D. Decamp, P. Ghez, C. Goy, S. Jezequel, et al.. Search for charged Higgs bosons in $e^+ e^-$ collisions at energies up to $\sqrt{s}$ = 189 GeV. International Conference on High-Energy Physics (ICHEP 2000) 30, Jul 2000, Osaka, Japan. pp.253-263. ⟨in2p3-00010861⟩

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