A Study of Pseudo-Central Collision Events Observed in Pion-Nucleus Interactions

TL;DR

This study analyzes pseudo-central collision events in pion-nucleus interactions at 340 GeV, focusing on charged particle distributions and correlations, revealing independence of pseudo-rapidity from collision multiplicities.

Contribution

It investigates pseudo-central collision events using high-energy pion interactions, providing insights into particle distribution characteristics and their independence from collision multiplicities.

Findings

Pseudo-rapidity distribution shows bimodality absence.

Mean pseudo-rapidity is independent of collision multiplicities.

Correlation between different particle multiplicities is discussed.

Abstract

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.