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A leptonic $(\bar l l)$ decay of a heavy quark-antiquark bound state $T(\barQQ)$ with a Higgs-boson $H$ emission is investigated. The applying of thewell-known low-energy theorem to meson-Higgs coupling allows one to estimatethe probability of the decay $T(\bar QQ)\to \bar ll H$. The only a simpleversion of the Standard Model extension containing two-Higgs doublet isconsidered.Comment: 5 pages, 2 figure

On the leptonic decay of a heavy quarkonium with a Higgs-boson emission