85 research outputs found

    Search for particles with unexpected mass and charge in Z decays

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    Update of electroweak parameters from Z decays

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    Measurement of the Mass of the Z-Boson and the Energy Calibration of Lep

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    Contains fulltext : 26847___.PDF (publisher's version ) (Open Access

    Electroweak parameters of the z0 resonance and the standard model

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    Contains fulltext : 124399.pdf (publisher's version ) (Open Access

    A search for pair-produced charged Higgs bosons in Z0 decays

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    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 . 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 25 000 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± → ντ] = 100%, 8.3 to 40.6 GeV for BR[H±→ντ] = BR[H±→cs] = 50%, and 14.4 to 35.4 GeV for BR[H±→cs] = 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±→ντ] = BR[H±→cb] = 50%, and 16.2 to 35.7 GeV for BR[H±→cb] = 100%

    Searches for the standard Higgs boson

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    A data sample corresponding to about 100 000 hadronic Z decays collected by ALEPH at LEP has been used to search for the standard Higgs boson produced in the reaction . No indication for any signal was found, and a 95% CL lower limit on the Higgs boson mass has been set at 41.6 GeV
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