Parity-Nonconserving One-Pion-Exchange Potential

Abstract

It is argued that the strangeness-conserving weak currents can contribute to the single-pion-exchange parity-nonconserving potential between nucleons bound in nuclei. Although this contribution is reduced by $\frac{{V}_{\mathrm{nuclear}}}{M}\ensuremath{\sim}0.04$, it may be comparable in strength with that usually calculated. Estimates of the strength of an off-mass-shell $\mathrm{NN}\ensuremath{\pi}$ vertex are carried out; neutral pion emission can occur. It is shown that the $\ensuremath{\Delta}(1236)N\ensuremath{\pi}$ weak vertex can be neglected.