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A study of meson-baryon couplings in the constituent quark model

  • Hadron Physics
  • Published:
Zeitschrift für Physik A Atomic Nuclei

Abstract

Within the framework of the constituent quark model we discuss the effects of different types of meson-baryon-baryon vertex operators on the form factors and the coupling strengths of the lowest-lying positive and negative parity non-strange baryons. We compare the quark pair creation model (3P0-model) with the SU(6)-model in which mesons are treated as elementary fields that directly couple to the quarks. The latter model is employed both in the so-called static limit and in a modification motivated by Galilei invariance. It is demonstrated that the inclusion of non-static effects simulates some features of the3P0 vertex. Especially the reaction πN→ππN is found to be very sensitive to the different assumptions on the dynamics of theq¯q pair creation process. More indirect hints for the internal structure of the mesons might be obtained from the predicted asymmetry for the two form factors ofN→Δ+π andΔ→N+π, which occurs in the3P0-model, only.

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Author notes

  1. S. Furui

    Present address: School of Science and Engineering, Teikyo University, 320, Utsunomiya, Japan

  2. R. Kaiser

    Present address: Institut für Theoretische Physik, Universität Karlsruhe, Kaiserstr. 12, W-7500, Karlsruhe, Germany

Authors and Affiliations

  1. Institut für Theoretische Kernphysik, Universität Bonn, Nussallee 14-16, W-5300, Bonn, Germany

    W. H. Blask, S. Furui, R. Kaiser, B. C. Metsch & M. G. Huber

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  1. W. H. Blask
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  2. S. Furui
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  3. R. Kaiser
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  4. B. C. Metsch
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  5. M. G. Huber
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Blask, W.H., Furui, S., Kaiser, R. et al. A study of meson-baryon couplings in the constituent quark model. Z. Physik A - Atomic Nuclei 337, 451–463 (1990). https://doi.org/10.1007/BF01294983

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  • DOI: https://doi.org/10.1007/BF01294983

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