Scalar form factors and nuclear interactions
classification
⚛️ nucl-th
keywords
effectsformscalarabnormallyanomalyargueassociatedchiral
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The scalar-isoscalar term in the two-pion exchange $NN$ potential is abnormally large and does not respect the hierarchy of effects predicted by chiral perturbation theory. We argue that this anomaly is associated with non-perturbative effects, which are also present in the $\pi N$ scalar form factor.
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