Eur. Phys. J. C 19, 213-227
Measurements of and and upper limits on andThe ALEPH Collaboration R. Barate and et al.
Laboratoire de Physique des Particules (LAPP), IN2P3-CNRS, 74019 Annecy-le-Vieux Cedex, France
(Received: 2 October 2000 / Published online: 15 March 2001 -© Springer-Verlag 2001)
Inclusive branching ratios involving transitions are measured in approximately four million hadronic Z decays collected by the ALEPH detector at LEP. The fully-inclusive branching ratio and the semi-inclusive branching ratio are measured to be and , in agreement with the standard model predictions. Upper limits on the branching fractions and are set to and at the 90% C.L. These results allow a 90% C.L. lower limit of 0.40 (GeV/c2)-1 to be set on the ratio, in the framework of type-II two-Higgs-doublet models.
© Società Italiana di Fisica, Springer-Verlag 2001