Limits on charge nonconservation studied by nuclear excitation ofI127

Lower limits on the mean lives of the charge-nonconserving (CNC) processes, ${}_{}{}^{127}{}_{}{}^{}\mathrm{I}$+${\mathit{e}}_{\mathit{K}}$ ${\to }^{127}$ ${\mathrm{I}}^{\mathrm{*}}$+ν, leading to the first (second) excited state of ${}_{}{}^{127}{}_{}{}^{}\mathrm{I}$, were obtained as τ>0.58(0.56)×${10}^{23}$ yr by searching for the γ decay from the first (second) excited state of ${}_{}{}^{127}{}_{}{}^{}\mathrm{I}$. Upper limits on the ratios of the CNC strengths to the charge-conserving ones through the weak boson and photon mediating processes are obtained as ${\mathrm{\epsilon }}_{\mathit{W}}^2$<11×${10}^{\mathrm{-}25}$ and ${\mathrm{\epsilon }}_{\gamma }^2$<4.8×${10}^{\mathrm{-}40}$.