Consistent off-shell $\pi N N$ vertex and nucleon self-energy

Groningen; O. Scholten (Kernfysisch Versneller Instituut; S. Kondratyuk; the Netherlands)

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Consistent off-shell $\pi N N$ vertex and nucleon self-energy

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arxiv nucl-th/9807077 v2 pith:ND6Z7WNQ submitted 1998-07-30 nucl-th

S. Kondratyuk , O. Scholten (Kernfysisch Versneller Instituut , Groningen , The Netherlands) This is my paper

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keywords nucleonvertexconsistentpion-nucleonself-energyadmixturecalculationcoupling

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We present a consistent calculation of half-off-shell form factors in the pion-nucleon vertex and the nucleon self-energy. Numerical results are presented. Near the on-shell point the pion-nucleon vertex is dominated by the pseudovector coupling, while at large nucleon invariant masses we find a sizable pseudoscalar admixture.

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