Two Particle Azimuthal Correlations in 4.2A GeV C+Ta Collisions

TL;DR

This study investigates azimuthal correlations of protons and pions in 4.2A GeV C+Ta collisions, revealing different correlation patterns and analyzing flow without reaction plane estimation.

Contribution

It provides new insights into particle correlations and flow analysis in heavy-ion collisions at intermediate energies.

Findings

Protons exhibit weak back-to-back correlations.

Negative pions show side-by-side correlations.

Flow intensity is determined without reaction plane estimation.

Abstract

Two particle azimuthal correlations are studied in 4.2A GeV C+Ta collisions observed with the 2-m propane bubble chamber exposed at JINR Dubna Synchrophasotron. The correlations are analyzed both for protons and negative pions, and their dependence on the collision centrality, rapidity and rapidity difference is investigated. It is found that protons show a weak back-to-back correlations, while a side-by-side correlations are observed for negative pions. Restricting both protons to the target or projectile fragmentation region, the side-by-side correlations are observed for protons also. Using the two particle correlation function, the flow analysis is performed and intensity of directed flow is determined without event-by event estimation of the reaction plane.