The present study is based on the interactions caused by 340-GeV negative pions with emulsion nuclei. The main aim of this paper is to investigate some aspects of central collision events. Thus, the events in which the total number of charged shower particles is greater than or equal to twenty eight (Ns geq 28) were chosen for the analysis. They are not exactly central collision events, but may be considered as pseudo-central collision events. The angular characteristics of relativistic charged secondaries have been studied in terms of pseudo-rapidity, and bimodality is found to be absent in the distributions. The mean pseudo-rapidity seems to be independent of grey and heavy particle multiplicities, which indicates its independence with number of collisions. Finally, the correlation between different particle multiplicities in this paper is discussed.

中文翻译：

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在 Pion-Nucleus 相互作用中观察到的伪中心碰撞事件的研究

本研究基于 340-GeV 负离子与乳液核引起的相互作用。本文的主要目的是研究中心碰撞事件的某些方面。因此，选择带电淋浴粒子总数大于或等于二十八 (Ns geq 28) 的事件进行分析。它们不完全是中心碰撞事件，但可以被认为是伪中心碰撞事件。相对论带电次级的角特性已经在伪快速性方面进行了研究，并且发现分布中不存在双峰性。平均伪快速性似乎与灰色和重粒子的多重性无关，这表明它与碰撞次数无关。最后，