Bounds on the Cabibbo-Kobayashi-Maskawa matrix elements vertical strokeVtdvertical stroke and vertical strokeVtsvertical stroke from experiments on B0-anti B0 mixings

We present a theoretical analysis of the process panti p → μ±μ±X, μ±X', μ+μ-X' due to heavy flavour production and decays, based on perturbative quantum chromodynamics, QCD. We find reasonable agreement for the inclusive rates and distributions between the UA1 measurement and our calculations, with the exception of the dimuon ratio R(±±/+--), which is found typically a factor ≅ 1.8 smaller than the UA1 data. We interpret this excess in terms of Bs0-anti Bs0 mixing and obtain a lower bound on the mixing probability, ρs > 0.14. In the standard model this implies a lower bound on the Cabibbo-Kobayashi-Maskawa matrix element vertical strokeVtsvertical stroke given the top quark mass. The lower bound on vertical strokeVtsvertical stroke and the upper bound on vertical strokeVtdvertical stroke, obtained from the (upper bound) Bd0-anti Bd0 mixing probability, ρd, from e+e- experiments are worked out. (orig.)