Diquark electromagnetic form factors in a Nambu-Jona-Lasinio model

Details Diquark electromagnetic form factors in a Nambu-Jona-Lasinio model Diquark electromagnetic form factors in a Nambu-Jona-Lasinio model

1993-05-06

arxiv.org/abs/hep-ph/9305215v1

Phys.Lett.B312:6-12,1993

Physics

High Energy Physics

High Energy Physics - Phenomenology

(11 pages, including one LaTeX figure) UNITU-THEP-4/1993

Scientific paper

10.1016/0370-2693(93)90477-Y

Electromagnetic properties of diquarks are investigated in the framework of a color-octet Nambu-Jona-Lasinio model, which describes baryons as bound states of diquarks and quarks. We calculate the electromagnetic form factors of scalar and axial vector diquark bound states using the gauge--invariant proper--time regularization. The nucleon charge radii and magnetic moments are estimated in a simple additive diquark--quark model. This picture reproduces the qualitative features such as the negative charge radius of the neutron. Within this model axial vector diquarks are seen to be important.

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