990 articles – 4695 Notices  [english version]
 HAL : in2p3-00010861, version 1
 International Conference on High-Energy Physics (ICHEP 2000) 30, Osaka : Japon
 Search for charged Higgs bosons in $e^+ e^-$ collisions at energies up to $\sqrt{s}$ = 189 GeV
 ALEPH Collaboration(s)
 (2000)
 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.
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
Liste des fichiers attachés à ce document :
 PDF
 democrite-00010861.pdf(201.1 KB)
 in2p3-00010861, version 1 http://hal.in2p3.fr/in2p3-00010861 oai:hal.in2p3.fr:in2p3-00010861 Contributeur : Magali Damoiseaux <> Soumis le : Vendredi 15 Septembre 2000, 13:56:40 Dernière modification le : Vendredi 15 Septembre 2000, 13:56:40