Form factors of baryons in a confining and covariant diquark-quark model

Oettel, M.; Ahlig, S.; Alkofer, R.; Fischer, C.
March 2000
AIP Conference Proceedings;2000, Vol. 508 Issue 1, p73
Academic Journal
We treat baryons as bound states of scalar or axialvector diquarks and a constituent quark which interact through quark exchange. This description results as an approximation to the relativistic Faddeev equation for three quarks which yields an effective Bethe-Salpeter equation. Octet and decuplet masses and fully four-dimensional wave functions have been computed for two cases: assuming an essentially pointlike diquark on the one hand, and a diquark with internal structure on the other hand. Whereas the differences in the mass spectrum are fairly small, the nucleon electromagnetic form factors are greatly improved assuming a diquark with structure. First calculations to the pion-nucleon form factor also suggest improvements. © 2000 American Institute of Physics.


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