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Higher-order field effects in pion absorption on two nucleons

Journal Article · · Phys. Rev. C; (United States)
We estimate the importance of rescattering diagrams involving intrinsically third-order effects in the pionic field for the process of pion absorption at rest on a pair of nucleons. The calculation is performed using a chiral bag model adapted for the correct description of higher-order pionic effects. The model provides the form factors needed in order to achieve a convergent result. The third-order diagrams cancel in part; nevertheless, the net result is as important as the conventional second-order s-wave rescattering mechanism for reasonable bag radii Rapprox.1 fm and becomes dominant for bag radii R< or approx. =0.7 fm for internucleon distances less than about 2 fm.
Research Organization:
Department of Physics and Astronomy, Tel Aviv University, 69978 Tel Aviv, Israel
OSTI ID:
5465776
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 28:3; ISSN PRVCA
Country of Publication:
United States
Language:
English