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    TH Meeting on Particle Physics Phenomenology

    The light sbottom mass window revisited

    by Patrick Janot (CERN)

    → Europe/Zurich
    TH Auditorium (CERN)

    TH Auditorium

    CERN
    Description
    An apparent excess of more than 4 sigma in the e+e- -> hadron cross-section for centre-of-mass energies between 20 and 209 GeV has recently been reported. This excess is claimed to be well reproduced over the whole energy range by the production of a pair of sbottoms with mass 6 GeV/c2 and mixing angle cos(theta_mix) = 0.18. I'll show that the reported excess essentially vanishes after the implementation of important improvements in the treatment of the PDG data. After these fixes, the combination of PEP, PETRA, TRISTAN and LEP data allows the 95% CL exclusion of a light sbottom decaying hadronically for any mixing angle, if its mass is below 6.0 GeV/ c2. The light sbottom mass window is closed.