Nucleon Form Factors in a Covariant Diquark-Quark Model

Details Nucleon Form Factors in a Covariant Diquark-Quark Model Nucleon Form Factors in a Covariant Diquark-Quark Model

1997-05-08

arxiv.org/abs/hep-ph/9705267v1

Nucl.Phys.A627:679-709,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

33 Pages, 10 figures, modfied elsart.sty included

Scientific paper

10.1016/S0375-9474(97)00514-9

In a model where constituent quarks and diquarks interact through quark exchange the Bethe-Salpeter equation in ladder approximation for the nucleon is solved. Quark and diquark confinement is effectively parametrized by choosing appropriately modified propagators. The coupling to external currents is implemented via nontrivial vertex functions for quarks and diquarks to ensure gauge invariance at the constituent level. Nucleon matrix elements are evaluated in a generalised impulse approximation, and electromagnetic, pionic and axial form factors are calculated.

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