Production of the B_c Meson
  The production of the B_c and B_c^* mesons was studied in the framework of the factorization formalism and perturbative QCD. Predicted results implied that an observable number of B_c and B_c^* events can be produced at LEP I and at Tevatron. The fragmentation approximation describes the production of the B_c and B_c^* mesons very well in high energy e^+e^- collisions. In hadronic collisions, it is valid when and only when the transverse momentum P_T of the produced B_c and B_c^* is much larger than the mass of the B_c meson. 
Yu-Qi Chen