Higgs boson decay to paired $B_c$: relativistic and one-loop corrections

The exclusive decays of the Higgs boson to $B_c B_c$ and $B_c^\ast B_c^\ast$ pairs are studied. The hard parts of the decay amplitudes are estimated within the perturbative Standard Model up to one-loop corrections. The soft fusion of heavy quarks to the quarkonium is described in framework of the relativistic quark model.
Comment: 18 pages, 5 figures. arXiv admin note: substantial text overlap with arXiv:1604.07633