Two-pion-exchange contributions to the pp\to ppπ^0 reaction

Details Two-pion-exchange contributions to the pp\to ppπ^0 reaction Two-pion-exchange contributions to the pp\to ppπ^0 reaction

2007-04-11

arxiv.org/abs/0704.1342v2

Phys.Lett.B657:187-191,2007

Physics

Nuclear Physics

Nuclear Theory

11 pages, minor change, a few references are added

Scientific paper

10.1016/j.physletb.2007.10.023

Our previous study of the near-threshold pp\to pp\pi^0 reaction based on a hybrid nuclear effective field theory is further elaborated by examining the momentum dependence of the relevant transition operators. We show that the two-pion exchange diagrams give much larger contributions than the one-pion exchange diagram, even though the former is of higher order in the Weinberg counting scheme. The relation between our results and an alternative counting scheme, the momentum counting scheme, is also discussed.

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