Charge symmetry violation due to the Coulomb force in the elastic scattering of ${\pi }^{\pm }$ from ${}_{}{}^3{}_{}{}^{}\mathrm{H}$ and ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ is studied using a theoretical optical potential with spin. Our calculated results compare favorably with the experimental differential cross sections of Källne et al. and of Nefkens et al., indicating that the observed violation of the charge symmetry can be due to direct Coulomb effects.

• Received 30 March 1987

DOI:https://doi.org/10.1103/PhysRevC.36.2155