S - and P - wave states of b̄c - quarkonium

In the leading O(α 4 s) order of the perturbative QCD, the hadronic production cross-sections of Sand P-wave states of B c meson are calculated. The results for the S-wave levels are compared with the values given in other papers as well as in the model of the b quark fragmenatation into B c. In the given order, the cross-sections of the hadronic production of the P-wave states are calculated for the first time. Their contribution into the B c meson production is less than 10%. There is a strong difference between the predictions of the fragmentation model and the exact perturbative calculations. These difeerences are discussed in details for the differential distributions over variuos kinematical quantities.