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The Spin of the Nucleon in Effective Models
Herbert Weigel
The three flavor soliton approach for baryons is utilized to discuss effects of flavor symmetry breaking in the baryon wave--functions on axial current matrix elements. The flavor…
Strongly Distorted Baryon Wave-Functions: Hyperon Beta-Decay and the Spin of the Lambda and the Nucleon
H. Weigel
Within the collective coordinate approach to chiral soliton models we suggest that breaking of SU(3) flavor symmetry mainly resides in the baryon wave-functions while the charge op…
The Skyrme Model for Baryons
J. Schechter, H. Weigel
We review the Skyrme model approach which treats baryons as solitons of an effective meson theory. We start out with a historical introduction and a concise discussion of the origi…
Strangeness content of the nucleon within the NJL soliton model
Abdellatif Abada, H. Weigel, R. Alkofer +1
We investigated the form factors of the nucleon associated with the nonet vector current in the framework of the generalized Yabu--Ando approach to the chiral soliton of the Nambu-…
Topologically non--trivial chiral transformations and their representations in a finite model space
R. Alkofer, H. Reinhardt, J. Schlienz +1
The role of chiral transformations in effective theories modeling Quantum Chromo Dynamics is reviewed. In the context of the Nambu--Jona--Lasinio model the hidden gauge and massive…
The Proton Spin Structure in Skyrme Type Models
H. Weigel
It is demonstrated how in the soliton approach to baryons a small but non-vanishing matrix element of the axial singlet current is obtained. Furthermore it is shown that these mode…