Centrality and rapidity dependence of particle ratios in Au+Au and Cu+Cu collisions at $\sqrt{s_{NN}}$ = 62.4 GeV

TL;DR

This paper presents measurements of particle ratios, average transverse momenta, and their dependence on centrality and rapidity in Au+Au, Cu+Cu, and p+p collisions at 62.4 GeV, providing insights into particle production mechanisms.

Contribution

It provides new experimental data on particle ratios and spectra across different collision systems and centralities at 62.4 GeV.

Findings

Particle ratios vary with centrality and rapidity.

Anti-particle to particle ratios are analyzed.

K/π ratios are studied across different collision types.

Abstract

We report on preliminary identified particle ratios from Au+Au collisions at $\sqrt{s_{NN}} = 62.4$ GeV in different centrality classes, measured with the BRAHMS spectrometer. Results from Cu+Cu and p+p collisions at mid-rapidity at the same energy are also included. The average transverse momenta of particle spectra, anti-particle to particle ratios and $K/\pi$ ratios dependence on centrality and rapidity are shown and discussed.