Dynamical gluon mass corrections in heavy quarkonia decays

Using the expression of the dynamical gluon mass obtained through the opera tor product expansion we discuss the relevance of gluon mass effects in the decays V --> hadrons (V = J/psi, Y), Relativistic and radiative correction s are also introduced to calculate alpha(s)(m(c)) and alpha(s)(m(b)) compar ing them with other values available in the literature. The effects of dyna mical gluon masses are negligible for Y decay but important for J/psi decay . (C) 2000 Elsevier Science B.V. All rights reserved.