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arXiv · 1011.2387

Analysis of the new Crystal Ball data on $K^-p\toπ^0Λ$ reaction with beam momenta of $514\sim 750$ MeV/$c$

Puze Gao·B. S. Zou·A. Sibirtsev
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Abstract

The Crystal Ball Collaboration has recently reported the differential cross sections and $Λ$ polarization for the reaction $K^-p\rightarrow π^0Λ$ using an incident $K^-$ beam with momenta between 514 and 750 MeV/$c$. We make a partial wave analysis for this process with an effective Lagrangian approach and study the properties of some $Σ$ resonances around this energy range. With the inclusion of the 4-star resonances $Σ(1189)$, $Σ^*(1385)$, $Σ(1670){3\over 2}^-$, $Σ(1775){5\over 2}^-$, as well as a $Σ(1635){1\over 2}^+$, which is compatible with the 3-star $Σ(1660){1\over 2}^+$ in PDG, our results can well reproduce the experimental data. The parameters on the $Σ$ resonances and related couplings are studied.

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Puze Gao, B. S. Zou, A. Sibirtsev. 2011-05-11. Analysis of the new Crystal Ball data on $K^-p\toπ^0Λ$ reaction with beam momenta of $514\sim 750$ MeV/$c$. https://doi.org/10.1016/j.nuclphysa.2011.07.008

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