PRODUCTION OF 4 HEAVY QUARKS AND B(C)-MESONS AT THE Z(0)-BOSON POLE

The cross section of bbccBAR quark production in e+e- annihilation is calculated in the framework of perturbative QCD. It is found to be app roximately sigma(e+e- --> bbccBAR)/sigma)(e+e- --> bbBAR) approximatel y 10(-2) at square-root s = M(Z). The cross sections of associated pro duction of 1S and 2S states of a B(c) meson in the reaction e+e- --> B (c)bcBAR are obtained by using the nonrelativistic model of heavy quar konium. The yield of LAMBDA(bc)-hyperons that is to be expected at LEP is estimated under the assumption of quark-hadron duality.