Quantization of the Nambu-Jona-Lasinio soliton and the nucleon-delta splitting
1991; Elsevier BV; Volume: 256; Issue: 3-4 Linguagem: Inglês
10.1016/0370-2693(91)91769-r
ISSN1873-2445
AutoresK. Goeke, A. Z. Górski, F. Grümmer, Th. Meißner, Hugo Reinhardt, R. Wünsch,
Tópico(s)Particle physics theoretical and experimental studies
ResumoThe self-consistent chiral soliton of the Nambu-Jona-Lasinio model is quantized by means of the collective coordinate method and the rotational moment of inertia is evaluated. For constituent masses around 400 MeV the nucleon-delta splitting agrees well with the experimental data. The contribution of the sea quarks to the moment of inertia is about 20%. In this region the isoscalar quadratic radius of the nucleon is reproduced as well and a clear valence quark picture prevails.
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