Pion-nucleon P_33 and P_11 scatterings in the Lippmann-Schwinger approach

Details Pion-nucleon P_33 and P_11 scatterings in the Lippmann-Schwinger approach Pion-nucleon P_33 and P_11 scatterings in the Lippmann-Schwinger approach

2007-10-16

arxiv.org/abs/0710.3026v1

ECONFC070910:240,2007

Physics

Nuclear Physics

Nuclear Theory

4 pages, 3 figures, to appear in the proceedings of the 11th International Conference on Meson-Nucleon Physics and the Structu

Scientific paper

We study the pion-nucleon P_33 and P_11 scattering, where the Delta and the Roper resonances are seen, respectively. We use the Lippmann-Schwinger equation extended to couple to a one-body state, and investigate nature of these resonances by taking and omitting a one-baryon state into account. We see validity and puzzle of the standard quark model interpretation, for the Delta and the Roper resonances, respectively.

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