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We present an analytical calculation of additional real or virtual radiationof the light fermion pair in the fermionic decay of the Higgs boson $ H \tof_1\bar f_1$ for arbitrary ratios of the Higgs boson mass to the $f_1$ fermionmass.  This result gives us a value of the $O(N_f \alpha _s^2)$ radiative correctionto the inclusive decay rate $ H \to f_1\bar f_1$. Using this result in theframework of the Brodsky-Mackenzie-Lepage scheme, we discuss the scale settingin the one-loop QCD correction to the decay width $ H \to f_1\bar f_1$ forarbitrary relation between the Higgs boson and fermion masses.Comment: Latex, 18 pages, 4 uuencoded figures, some misprints in formulas are  correcte

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

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