Double vector quarkonia production in exclusive Higgs boson decays

Partial decay widths and branching fractions are calculated for the exclusive decays of the standard model Higgs boson into a pair of vector quarkonium states, $H\ensuremath{\rightarrow}J/\ensuremath{\psi}J/\ensuremath{\psi}$, $H\ensuremath{\rightarrow}\ensuremath{\Upsilon}\ensuremath{\Upsilon}$, $H\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\phi}$, $H\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\Upsilon}$, with relativistic corrections due to quark motion in mesons taken into account.