Hyperon I: Partial wave amplitudes for $K^{-}p$ scattering

Abstract

Early data on $K^{-}$ induced reactions off protons are collected and used in a coupled-channel partial wave analysis (PWA). Data which had been published in the form of Legendre coefficients are included in the PWA. In a {\it primary} fit using 3* and 4* resonances only, we observe some significant discrepancies with the data. In a systematic search for new $\Lambda$ and $\Sigma$ hyperon resonances, additional candidates are found. The significance of the known and of the additional resonances is evaluated. Seventeen resonances listed with 1* or 2* and one resonance listed with 3* in the Review of Particle Properties cannot be confirmed, five new hyperons are suggested. The partial-wave amplitudes deduced in this analysis are compared to those from other analyses.

arXiv comment28 pages, 27 figures, 9 Tables

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• 50 Years of Quantum Chromodynamics
• Review of the $\mathbf{\Lambda }$(1405): A curious case of a strange-ness resonance
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• Partial wave analysis of the charmed baryon hadronic decay ${\Lambda }_c^{+}\to \Lambda {\pi }^{+}{\pi }^0$
• New insights into the pole parameters of the $\Lambda (1380)$, the $\Lambda (1405)$ and the $\Sigma (1385)$
• Photo- and electro-production of narrow exotic states: from light quarks to charm and up to bottom
• $\Lambda$ and $\Sigma$ Excitations and the Quark Model
• Double-strangeness exchange reactions in a hybrid Regge-plus-resonance approach
• A possible interpretation of $\Lambda$ baryon spectrum with pentaquark components
• Amplitude analysis of the ${\Lambda }_b^0\to p{K}^{-}\gamma$ decay
• The $\Lambda (1405)$ resonance as a genuine three-quark or molecular state
• Low-lying $\Lambda$ and $\Sigma$ resonances studied with the forward $K^{\ast }$ productions off the proton induced by a high-momentum $\pi$ beam