QCD Analysis of \Delta S=0 Hadronic Parity Violation

We revisit the QCD analysis of the effective weak Hamiltonian at hadronic energy scales for strangeness-nonchanging ($\Delta S=0$) hadronic processes. Performing a leading-order renormalization group analysis in QCD from the weak to hadronic energy scales, we derive the pertinent effective Hamiltonian for hadronic parity violation, including the effects of both neutral and charged weak currents at the electroweak scale. We determine the additional four-quark operators that enter at low energy scales from QCD operator mixing effects, and we analyze the operator matrix elements using the factorization {\it Ansatz} and recent assessments of the quark axial charges of the nucleon in lattice QCD. We compute the weak meson-nucleon couplings for comparison with existing work.