Origin of resonances in the chiral unitary approach

DOI DOI Web Site Web Site 被引用文献52件 オープンアクセス

書誌事項

公開日
2008-08-06
権利情報
  • http://link.aps.org/licenses/aps-default-license
DOI
  • 10.1103/physrevc.78.025203
  • 10.48550/arxiv.0803.2550
公開者
American Physical Society (APS)

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説明

We study the origin of the resonances associated with pole singularities of the scattering amplitude in the chiral unitary approach. We propose a "natural renormalization" scheme using the low-energy interaction and the general principle of the scattering theory. We develop a method to distinguish dynamically generated resonances from genuine quark states [Castillejo-Dalitz-Dyson (CDD) poles] using the natural renormalization scheme and phenomenological fitting. Analyzing physical meson-baryon scatterings, we find that the Lambda(1405) resonance is largely dominated by the meson-baryon molecule component. In contrast, the N(1535) resonance requires a sizable CDD pole contribution, while the effect of the meson-baryon dynamics is also important.

RevTeX4, 14 pages, 4 figures, 4 tables, title changed by editors, final version to appear in Phys. Rev. C

収録刊行物

  • Physical Review C

    Physical Review C 78 (2), 025203-, 2008-08-06

    American Physical Society (APS)

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