Diquarks in a chiral soliton field

Abstract

In the Nambu--Jona-Lasinio model baryons are either considered as quark-diquark-composites or the soliton configurations of the model are interpreted as baryons. As a first step towards constructing a hybrid model, which possesses a dynamical interplay between both pictures, the Bethe-Salpeter equation for diquarks in the background of a soliton configuration is solved. The presence of the soliton causes a significant reduction of the resulting bound state eigenenergy of the diquark. As a consequence a unit baryon number configuration may be constructed with a mass lower than the energy of the soliton. An estimate of the influence of the diquark on the meson fields indicates a small decrease of the extension of the soliton due to diquark correlations.

8 pages, LaTeX, 2 figures not included, complete postscript file available at http://infoserv.zdv.uni-tuebingen.de/uni/pii/

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Cited by in corpus (4)

• Baryons as Chiral Solitons in the Nambu--Jona-Lasinio Model
• Nucleon Form Factors in a Covariant Diquark-Quark Model
• Baryons as Hybrids of Solitons and Three Quark Bound States
• Dynamical Interplay of Quarks and Solitonic Meson Clouds in Baryons