{pi}{ital NN} and {pi}{ital N}{Delta} form factors determined from a microscopic model for {pi}{ital N} scattering

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.54.1561· OSTI ID:385800

Schuetz, C; Haidenbauer, J; Holinde, K ^[1]

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1. Institut fuer Kernphysik, Forschungszentrum Juelich GmbH, D-52425 Juelich (Germany)

We determine the {pi}{ital NN} and {pi}{ital N}{Delta} form factors from the {ital P}{sub 11} ({ital P}{sub 33}) partial wave of {pi}{ital N} scattering by dressing corresponding bare vertices with the help of {pi}{ital N} non-{ital s}-pole contributions. The underlying model is based on meson exchange, and involves nucleon and delta-isobar pole and crossed-pole terms together with correlated {pi}{pi} exchange in the {ital J}{sup {ital P}}=0{sup +} ({sigma}) and 1{sup {minus}} ({rho}) channel. As a whole our results for the {pi}{ital NN} form factor are somewhat less soft than (i) those determined recently quite analogously by Saito and Afnan and (ii) our results for the {pi}{ital N}{Delta} form factor. The results for the {pi}{ital NN} form factor depend, due to trival kinematical factors, on the type of bare {pi}{ital NN} coupling (ps or pv); namely for ps coupling it is less soft. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 385800
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 4 Vol. 54; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COUPLING
DELTA BARYONS
EXCHANGE INTERACTIONS
FORM FACTORS
NUCLEON-NUCLEON INTERACTIONS
PARTIAL WAVES
PION-NUCLEON INTERACTIONS
VERTEX FUNCTIONS