A search for pair-produced charged Higgs bosons in decays of the Z0 has been performed using the ALEPH detector at LEP for the decay channels H+ H- -> nu tau+ antinu tau-, H+ H--> c sbar cbar s. Searches for two additional decay channels in which cs is replaced by cb were also performed. With 1.17 pb−1 of integrated luminosity, corresponding to about 25000 hadronic decays of the Z0, the charged Higgs has been excluded at 95% CL in the mass range 7.6 to 43.0 GeV for BR(H+/- -> nu_tau tau)=100%, 8.3 to 40.6 GeV for BR(H+/- -> nu_tau tau)=BR(H+/- -> c s)=50%, and 14.4 to 35.4 GeV for BR(H+/- -> c s)=100% . With cs replaced by cb, the charged Higgs has been excluded at 95% CL in the mass range 12.0 to 40.7 GeV for BR(H+/- -> nu_tau tau)=BR(H+/- -> c b)=50%, and 16.2 to 35.7 GeV for BR(H+/- -> c b)=100%.
A Search For Pair-produced Charged Higgs Bosons In Z0 Decays
CIOCCI, MARIA AGNESE;BATIGNANI, GIOVANNI;FERRANTE, ISIDORO;FIDECARO, FRANCESCO;FORTI, FRANCESCO;GIORGI, MARCELLO;MESSINEO, ALBERTO MARIA;TONELLI, GUIDO EMILIO;TRIGGIANI, GIUSEPPE;
1990-01-01
Abstract
A search for pair-produced charged Higgs bosons in decays of the Z0 has been performed using the ALEPH detector at LEP for the decay channels H+ H- -> nu tau+ antinu tau-, H+ H--> c sbar cbar s. Searches for two additional decay channels in which cs is replaced by cb were also performed. With 1.17 pb−1 of integrated luminosity, corresponding to about 25000 hadronic decays of the Z0, the charged Higgs has been excluded at 95% CL in the mass range 7.6 to 43.0 GeV for BR(H+/- -> nu_tau tau)=100%, 8.3 to 40.6 GeV for BR(H+/- -> nu_tau tau)=BR(H+/- -> c s)=50%, and 14.4 to 35.4 GeV for BR(H+/- -> c s)=100% . With cs replaced by cb, the charged Higgs has been excluded at 95% CL in the mass range 12.0 to 40.7 GeV for BR(H+/- -> nu_tau tau)=BR(H+/- -> c b)=50%, and 16.2 to 35.7 GeV for BR(H+/- -> c b)=100%.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.