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The particle physics input to the NN charge asymmetric potential due to {ρ}-{ω} mixing is updated. The calculated changes in scattering lengths {}a_nn-a_pp~1.3±0.2 fm are in good agreement with experiment ({~}1.4±{}0.8 fm), as are the contributions to the binding energy difference in the A=3 mirror nuclei.
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Coon et al. (1987) studied this question.
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