Bc-mesons physics

In the framework of potential models for heavy quarkonium the mass spectrum for the system (b-bar c) is considered. The relations, following from the approximate spin symmetry for the heavy quarks in the heavy quarkonium, are analysed for the form factors of the semileptonic weak exclusive decays of Bc. The Bc lifetime is evaluated with account taken of the corrections to the spectator mechanism of the decay, because of the quark binding into the meson. The total and differential cross sections of the Bc production in different interactions are calculated. The analytic expressions for the fragmentational production cross sections of Bc are derived. The possibility of the practical Bc search in the current and planning experiments in electron-positron and hadron colliders is analysed. 94 refs., 23 refs., 28 tabs