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Heavy Quark Solitons in the Nambu--Jona-Lasinio Model
L. Gamberg, H. Weigel, U. Zückert +1
The Nambu--Jona-Lasinio model (NJL) is extended to incorporate heavy quark spin-symmetry. In this model baryons containing one heavy quark are analyzed as bound-states of light bar…
Radiative Decays of Hyperons in the Skyrme Model: E2/M1 Transitions
A. Abada, H. Weigel, H. Reinhardt
We study the radiative decays of baryons in the framework of the SU(3) collective approach to the Skyrme model. We present the predictions for the decay widths…
Strange Nucleons and Hyperons as Chiral Solitons in the NJL Model
R. Alkofer, H. Weigel, H. Reinhardt +1
In the chirally symmetric Nambu--Jona-Lasinio model baryons are described as chiral solitons of mesonic quark--antiquark bound states. Hyperons are investigated in two complementar…
Monopole Excitations of Baryons in the Nambu--Jona--Lasinio Soliton Model
A. Abada, R. Alkofer, H. Reinhardt +1
We investigate the monopole excitations of the soliton in the Nambu--Jona--Lasinio model. By studying the solutions to the corresponding Bethe--Salpeter equation in the background…
On the strange vector form factors of the nucleon in the NJL soliton model
H. Weigel, A. Abada, R. Alkofer +1
Within the Nambu--Jona--Lasinio model strange degrees of freedom are incorporated into the soliton picture using the collective approach of Yabu and Ando. The form factors of the n…
Diquarks in a chiral soliton field
U. Zückert, R. Alkofer, H. Weigel +1
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 to…