We have been studying the (Σπ)0 mass distribution based on data from an old Hydrogen Bubble Chamber collected by Thomas et al. concerning the p(π-, K0)Σπ reaction at pπ = 1.69 GeV/c. In this analysis we investigated the formation of the Λ(1405) state, using the Generalized Optical Theorem and T-matrix operator. We applied a combined transition operator, Tmix, which contains T21 (=TπΣ-KN) and T22 (= TπΣ-πΣ) due to the initial channel mixing in the Λ(1405) formation. We also considered a possible mixture of I = 0 and 1 in the wave function, as well as some background of the Σ(1385) population.

中文翻译：

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在pπ= 1.69 GeV / c的π-p→K0πΣ反应中的Λ（1405）生成数据分析。

我们一直在根据Thomas等人收集的旧氢气鼓室数据研究（Σπ）0质量分布。关于在pπ= 1.69 GeV / c时的p（π-，K0）Σπ反应。在此分析中，我们使用广义光学定理和T矩阵算符研究了Λ（1405）态的形成。由于Λ（1405）形成中的初始通道混合，我们应用了组合的过渡算子Tmix，其中包含T21（=TπΣ-KN）和T22（=TπΣ-πΣ）。我们还考虑了波动函数中I = 0和1的可能混合以及Σ（1385）总体的某些背景。