Scalar form factors and nuclear interactions

Abstract

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.

Talk given at the 20EFB, Pisa, Italy, September 2007. 3 pages and 4 figures

References in corpus (4)

• Two-pion exchange three-nucleon potential: O(q^4) chiral expansion
• Two-pion exchange nucleon-nucleon potential:O(q^4) relativistic chiral expansion
• Relativistic $O(q^4)$ two-pion exchange nucleon-nucleon potential: configuration space
• Pion-delta sigma-term