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Role of bare propagator poles in phenomenological Dyson–Schwinger type models

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Abstract

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.

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Author notes

  1. S. Ceci

    Present address: Department of Physics and Astronomy, University of Georgia, Athens, GA, 30602, USA

Authors and Affiliations

  1. Rudjer Bošković Institute, Bijenička c. 54, 10 000, Zagreb, Croatia

    S. Ceci, A. Švarc & B. Zauner

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  1. S. Ceci
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  2. A. Švarc
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  3. B. Zauner
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Correspondence to A. Švarc.

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Ceci, S., Švarc, A. & Zauner, B. Role of bare propagator poles in phenomenological Dyson–Schwinger type models. Eur. Phys. J. C 58, 47–56 (2008). https://doi.org/10.1140/epjc/s10052-008-0742-z

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  • DOI: https://doi.org/10.1140/epjc/s10052-008-0742-z

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