Aspects of strangeness -1 meson-baryon scattering
| Autor: | José Antonio Oller, Joaquim Prades, Michela Verbeni |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics Chiral perturbation theory Nuclear Theory Meson Scattering FOS: Physical sciences Sigma Strangeness Lambda Nuclear Theory (nucl-th) Baryon High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Content (measure theory) |
| Zdroj: | The European Physical Journal A. 31:527-533 |
| ISSN: | 1434-601X 1434-6001 |
| Popis: | We consider meson-baryon interactions in S-wave with strangeness -1. This is a sector populated by plenty of resonances interacting in several two-body coupled channels. We consider a large set of experimental data, where the recent experiments are remarkably accurate. This requires a sound theoretical description to account for all the data and we employ Unitary Chiral Perturbation Theory up to and including O(p^2). The spectroscopy of our solutions is studied within this approach, discussing the rise from the pole content of two \Lambda(1405) resonances and of the \Lambda(1670), \Lambda(1800), \Sigma(1480), \Sigma(1620) and \Sigma(1750). We finally argue about our preferred fit. Comment: 6 figures, 3 figures, talk given in the IVth International Conference on Quarks and Nuclear Physics (QNP06), Madrid June 5th and 10th, 2006. One reference is updated |
| Databáze: | OpenAIRE |
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