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The effects of charge-symmetry breaking of nuclear forces can be observed in neutron-proton elastic scattering. We present and apply a formalism used to compute the effects. The major contributions arise from the neutron-proton mass difference in one-pion and one-rho exchanges, from the neutron anomalous magnetic moment in one-photon exchange, and from rho-omega meson mixing. Two-pion exchange and quark effects were found to be very small. We find our results in agreement with the one existing measurement.
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Williams et al. (1987) studied this question.
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