“…+ .................. (46), where ∆ B ∼ 1 GeV is an auxiliary scale (the Borel mass [109]) which separates "short" and "long" distance in the QCD sum rule analysis. While Ioffe's formula needs to be improved by including condensates of higher dimensions, it nevertheless demonstrates the close connection between dynamical mass generation and spontaneous chiral symmetry breaking n QCD.…”