Production of Bound States of Quarks and Leptons in Rare Higgs Boson Decays

The production of heavy quark and lepton bound states in the decay of the Higgs boson has been studied. Various decay mechanisms have been considered that make a significant contribution to the Higgs boson decay width. When calculating the decay widths, we take into account relativistic corrections both in the decay amplitude and in the wave function of the bound state of the particles.