Effective field theory contribution to charge symmetry breaking NN scattering

Details Effective field theory contribution to charge symmetry breaking NN scattering Effective field theory contribution to charge symmetry breaking NN scattering

2001-08-08

arxiv.org/abs/nucl-th/0108015v1

Phys.Rev. C65 (2002) 037001

Physics

Nuclear Physics

Nuclear Theory

8 pages, 4 eps figures

Scientific paper

10.1103/PhysRevC.65.037001

The effect of isospin breaking pion s-wave rescattering is included in elastic NN scattering at low energies using effective field theory. Although this mechanism gave a large contribution to charge symmetry breaking in np --> d pi0, the effect is rather small in pp vs. nn scattering parameters and in the 3H-3He binding energy difference. This smallness is caused by large cancellation of the up-down quark mass difference contribution and electromagnetic effects to the np mass difference.

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