Truncation of the operator-product expansion for the〈qq¯〉-condensate component of the quark mass

Quark-condensate contributions to $m_{\mathrm{dyn}}$, the quark mass generated by the dynamical breakdown of chiral symmetry, are shown to arise from only the first two terms of the operator-product expansion (OPE) for the appropriate $O\left(g^2\right)$ nonperturbative vacuum expectation value. Since the $\frac{m}{\mathrm{}\left|p\right|\mathrm{}}$ expansion parameter of the OPE is unity on the gauge-invariant $p=m_{\mathrm{dyn}}$ propagator pole, such truncation of OPE contributions is an essential support to the calculation of $m_{\mathrm{dyn}}$.