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

A leptonic $(\bar{l}l)$ decay of a heavy quark-antiquark bound state $T(\bar QQ)$withaHiggs-boson$H$ emission is investigated. The applying of the well-known low-energy theorem to meson-Higgs coupling allows one to estimate the probability of the decay $T(\bar{Q}Q)\to \bar{l}lH$. The only a simple version of the Standard Model extension containing two-Higgs doublet is considered.