Abstract
We construct to all orders in the pion field and to one power of pion momentum the most general lagrangian for parity-violating pion-nucleon interactions that can arise from weak interactions. In particular, we show that in addition to the previously discussed P-violating πNN vertex, there are independent ππNN, and πγNN interactions. All three may be relevant for nuclear and atomic parity-violation experiments, as well as P-violating elastic nucleon scattering. We give numerical estimates for the interactions, and show that there is reason to believe that the Z°-induced strange-quark operator ( sγ μγ 5s)( uγ μu− dγ μd) contributes significantly in the ΔI = 1 channel.
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