  Basic chiral QCD parameters (the pion decay constant, the quark and gluon
condensates, the dynamically generated quark mass, etc) as well as the vacuum
energy density (up to the sign, by definition, the bag constant) have been
calculated from first principles within a recently proposed zero modes
enhancement (ZME) model of the true QCD vacuum. Our unique input data was
chosen to be the pion decay constant in the chiral limit as given by the chiral
perturbation theory at the hadronic level (CHPTh). In order to analyze our
numerical results we set a scale by two different ways. In both cases we obtain
almost the same numerical results for all chiral QCD parameters.
Phenomenological estimates of these quantites as well as vacuum energy density
are in good agreement with our numerical results. Complementing them by the
numerical value of the instanton contribution to the vacuum energy density, we
predict new, more realistic values for the vacuum energy density, the bag
constant and the gluon condensate.
