Reanalysis of our experimental results on ${}_{}{}^{12}{}_{}{}^{}\mathrm{B}$ and ${}_{}{}^{12}{}_{}{}^{}\mathrm{N}$ provides shape factors that yield ${({a_{-}}^0-{a_{+}}^0)}_{\exp }=+(0.86\mathrm{}\pm 0.24)\%$ Me${\mathrm{V}}^{-1\mathrm{}}$, still in good agreement with the theoretical prediction of ${({a_{-}}^0-{a_{+}}^0)}_{\mathrm{theo}}=+0.86\%$ Me${\mathrm{V}}^{-1\mathrm{}}$. The experimental evidence for the conserved-vector-current theory as manifested in the mass-12 triad is on no less firm ground than it was at the time of our previous publication.

• Received 11 March 1977

DOI:https://doi.org/10.1103/PhysRevLett.39.72