https://doi.org/10.1140/epjc/s10052-008-0742-z
Regular Article - Theoretical Physics
Role of bare propagator poles in phenomenological Dyson–Schwinger type models
Rudjer Bošković Institute, Bijenička c. 54, 10 000, Zagreb, Croatia
* e-mail: alfred.svarc@irb.hr
Received:
1
April
2008
Revised:
26
August
2008
Published online:
2
October
2008
The generation of dressed meson–nucleon scattering-matrix poles is presented. A possible scenario for the interrelation of bare and dressed baryon poles is shown by using a particular version of coupled-channel Dyson–Schwinger type model. These findings are then applied to the Roper resonance, and the conclusion is drawn that it is dynamic in nature. A possible correlation between bare and dressed propagator poles on one side and the quantities of constituent quark-model calculations on the other side are discussed.
PACS: 14.20.Gk – / 12.38.-t – / 13.75.-n – / 25.80.Ek – / 13.85.Fb – / 14.40.Aq –
© Springer-Verlag , 2008
