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• W2070522446 abstract "We discuss the experimental and theoretical status of charge-symmetry violation (CSV) in the elastic scattering of ${ensuremath{pi}}^{+}$ and ${ensuremath{pi}}^{ensuremath{-}}$ on ${}^{3}mathrm{H}$ and ${}^{3}mathrm{He}.$ Analysis of the experimental data for the ratios ${r}_{1},$ ${r}_{2},$ and R at ${T}_{ensuremath{pi}}=142,$ 180, 220, and 256 MeV provides evidence for the presence of CSV. We describe pion scattering from the three-nucleon system in terms of single- and double-scattering amplitudes. External and internal Coulomb interactions as well as the ${ensuremath{Delta}}_{33}$-mass splitting are taken into account as sources of CSV. Reasonable agreement between our theoretical calculations and the experimental data is obtained for ${T}_{ensuremath{pi}}=180,$ 220, and 256 MeV. For these energies, it is found that the ${ensuremath{Delta}}_{33}$-mass splitting and the internal Coulomb interaction are the most important contributions for CSV in the three-nucleon system. The CSV effects are rather sensitive to the choice of pion-nuclear scattering mechanisms, but at the same time, our theoretical predictions are much less sensitive to the choice of the nuclear wave function. It is found, however, that data for ${r}_{2}$ and R at ${T}_{ensuremath{pi}}=142mathrm{MeV}$ do not agree with the predictions of our model, which may indicate that there are additional mechanisms for CSV which are important only at lower energies." @default.
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• W2070522446 date "2002-11-27" @default.
• W2070522446 modified "2023-10-16" @default.
• W2070522446 title "Charge-symmetry violation in pion scattering from three-body nuclei" @default.
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• W2070522446 doi "https://doi.org/10.1103/physrevc.66.054007" @default.
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